PSHS General Specifications and Technical Specifications

8/12/2019 PSHS General Specifications and Technical Specifications

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TECHNICAL SPECIFICATIONS

TABLE OF CONTENTS

DIVISION 2 - SITE W OR K

0211 0 Clearing of Site02200 Earthwork02280 Termite Proofing0240 0 Site Drainag e

DIVISION 3 - CONCRETE

03100 Concrete Form work03160 Structural decking03200 Concrete Reinforceme nt03300 Cast- in-place Concrete0345 1 Archite ctural Precast Fiber Concre te Wall pane ls

DIVISION 4 - MASONRY

04100 Mortar04200 Unit Ma sonry

DIVISION 5 - METALS

05100 Structural Steel05170 Miscel laneo us Metal

DIVISION 6 - CARPENTRY

06100 On-Site Carpen try06220 Millworks

DIVISION 7 - THER MA L & MO ISTURE PROTECTION

07100 Waterproofing07320 Tiled Roofing07400 Metal roofing


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DIVISION 8 -DOORS & WINDOWS

08100 Stee l Wind ow

08510 Steel Doors08200 Wo od Doors08520 Aluminu m Windo ws08710 Finish Hardw are08730 Wea ther Str ipping08800 Glass and Glazing

DIVISION 9 - FINISHES

09220 Cem ent Finishes09310/90 Ceramic & Cem ent Tilework09340 Marble Finish09390 Cem ent Tile09610 Pebble Wa shou t Finish0965 0 Vinyl Floor Finish09900 Painting

DIVISION 10 - SPECIALTIES

10521 Fire Extingu ishers10820 Toilet Acce ssorie s

DIVISION 11 - MECHANICAL

11320 Laborato ry Gas Piping System11400 Plumb ing Works

DIVISION1 2 - ELECTRICAL WORKS


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DIVISION 2 - SITEWORK

SECTION 02110 CLEAR ING OF SITE

PART 1 GEN ERAL

1.01 SCOPE

Furnish equipm ent and perform labor required to com plete removal ofsalvage ma terials, disposal of resulting trash, waste , timb er stump s, andother vegetation. See drawing for area covering of work involved.

1.02 PERMITS

Secure and pay for all necessary permits required for the work.

1.04 PROTECTION

Protect adjacent properties, persons, shrubs, trees, lawn, structures, andutilities therein against harm or damage.

PART 2 EXECUT ION

2.01 DEMOLITION

a. Dem olish and remove from site existing structures and otherobstructions within the building area as indicated in the plans.

b. W here existing concrete on grou nd is to be dem olished. Remove allexisting concrete and other obstructions to a depth of 0.60 meterbelow grade.

c. Cap all existing utility lines, consult ow ner before com me ncing work.

2 .02 CLEARING AND GRUBBING

a. Uproot trees or cut down as show n in the plans or as directed by theArchitect.

2.03 REPAIRS

a. Repair dam ages done to property of any person or persons or off thepremises, by reason of the required work for demolition, Clearing and

Grubbing.

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SECTION 02200 EARTHW ORK

PART 1 GEN ERA L

1.01 SCOPE

a. Furnish material and equipm ent and perform labor required tocomplete

StrippingSite gradingExcavationTrenchingBackfillingCompactionDewatering

b. See drawings for location and extend of wo rk required.

1.02 VERIFICATION OF EXISTING CON DITIONS

a. Verify and exam ine the site of work to familiarize with the characterof materials to be encountered and all other existing conditionsaffecting the work.

1.03 PROTECTION

a. Provide adequ ate protection me asures to protect materials, men andadjoining property.

b. Provide shoring, sheeting and bracing to prevent carving, erosion orgullying of sides of excava tion.

c. Provide for surface drainage during the period of construction in such

manner as to avoid creating a nuisance to adjacent areas. Keep allexcavation free of wa ter at all times.

PART 2 PRO DUC TS

2.01 MATERIALS

a. Select fill material shall be laboratory appro ved from off site source,passing a 75 mm (3 in.) sieve. The fraction passing a C.425 mm(No. 40) sieve shall have a liquid limit not exceeding 35% and a

plasticity index not exceeding 12%

b. Granu lar fill gravel base to form a capillary water barrier shall beclean crushed non-poro us rock; crushe d or uncrush ed gravel,

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uniformly graded and of a size which will pass a 1-inch mesh screenand be retained on a No. 4 mesh screen.

c. Excavated material app roved for use as backfill shall be free of stoneslarger than 50 mm in longest dimension, roots and organic materials.

PART 3 EXEC UTIO N

3.01 STRIPPING

a. Strip top soil only in areas required as sho wn in the plans. Rem ovetop soil to depths indicated or as required by the Architect but in nocase less than 100 mm in depth, prior to start of regular excavation orbackfilling work.

b. Stock pile the rem oved top soil sepa rate from other excavatedmaterials in locations designated by the Architect and or spread andcompact with a light roller in areas indicated in the plans or wheredirected by the Architect.

3 .02 SITE GRA DING

a. Cut & fill and ma chine grade the site area. D eposit materials inhorizon tal layer not exce eding 200 m m in dep th and com pact inaccordance with metho d A of AS TM D 1557-667. Rough gradeelevations and levels shal l be approxim ately 150 mm below thebottom of the slabs on grade, 250 mm below finish grades in areas tobe lawn seeded or landscaped.

3 .03 STAKES AND BATTER BOARD S

a. Stake ou t building accurately and establish grade s.

b. Batter board s and reference shall be erected at location wh ere they

will not be disturbed during the construction.

c. Construct two perm anent bench marks of previously knownelevations near the site of construction.

3.04 EXCAVATION

a. Excavate to the dim ensio ns and elevation s indicated on the draw ings.Carry excavation to depth s directed by the Archite ct shou ldunsuitable bearing be encountered at elevations indicated.

b. Excavation carried to a greater dep th or size indicated or requiredthrough error, shall be corrected by filling such additional depth orsize with lean concrete.

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c. Bottom s of excavation shall be level, free from loose material, andbroug ht to indicated or required levels in undisturb ed earth or incompacted fill .

d. Excavate with proper allow ance m ade for floor slabs, form erection,shoring, drain t i le , waterproofing, masonry and adequate space forinspection of found ations.

3 .05 DEWATERING

a. Control grading around building so that ground is pitched to preventwater from running into excavated areas of buildings or damagingother structures.

b. Pum p wa ter out of excavate areas thro ugh out the construc tion, wate rshall not be conduced into adjacent developed property.

3 .06 TREN CHING FOR SUB-DRA INAIGE

a. Excavate trench es for und ergro und utility system and drain lines,grade and tamp to provide firm bed trenches for drain lines.

b. W he n rock is enco unte red, excavate to a dep th of 150 mm below thebottom elevation of the pipe and fill with sand and gravel or crushedstones thoroughly compacted before laying pipe.

3.07 BACKFILLING

a. Prior to backfilling aroun d structures, rem ove all form s, trash anddebris. Use only approved backfill material and place symmetricallyon all sides in layers, moistened in accordance with item 3.09 of thissection.

b. Backfill arou nd structures only after the conc rete has attained

sufficient strength to resist lateral pressure resulting from the backfill .

3 .08 SOIL COM PACTION

a. All existing earth within building lines that has been disturbed shallbe placed in 150 mm layers and compa cted to 95% of maxim umdensity at optimum moisture content required for fill in accordanceto AASHO method.

3.09 DISPO SAL OF EXCAVATED MATER IAL

a. Surp lus ma terial resulting from all earth wo rk ope rations not requiredor unsuitable for fill or backfill shall be disposed off.

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PART 4 SOIL BEAR ING CAPACITY

4.01 If durin g excavation, conditions discovered at the site does not conform to

the f indings of the "SOILS INVEST IGATIONS REP OR T" subm itted by the soi lenginee r, th e o wn er shall im me diately notify th e architect or hisrepresentative, in writing, of such conditions.

4.02 Th e soil eng ineer and the structural eng inee r shall visit the site and make thechanges in foundation design as necessary.

4.03 No footin g shall rest on fill unless directed oth erw ise by th e structuralengineer.

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SECTION 02280 TER MIT E PROO FING : Bukbok Proofing

PART 1 GEN ERAL

SCOPE OF WORK

The ow ner shall hire the services of the specified pesticide com pany tofurnish all labor, materials, equipment, tools, plants, and services tocom plete the termite proofing and b ukbok proofing work hereinafterdescribed.

PART 2 PRO DUC TS

CHEMICALS AND EQUIPMENT

For termites, use only "CHLORDANE" diluted with water at the proportion ofONE (1) PART CHLORDANE to FIFTY (50) parts water. Dilution shall be done atthe job site in the present of the owner's Project Engineer or the Architect.Use MO TORIZ ED POW ER SPRA YERS ONLY. For bukbok, usepentachlorophenon (with organs chlorine) colorless, and at ratio 1:100.

PART 3 EXECU TION

3.01 APPLICATION AND TREATMENT

a. Foundation Treatme nt

Prior to pouring foundations, apply ONE (1) gallon of the preparedmixture per linear meter of all excavations for footings, foundations,around sewer pipes, conduits and other concrete works.

b. Backfill Treatme nt

Apply another ONE (1) gallon per linear meter of all backfill materials

as it is being replaced into the trenche s after the footing slab arepoured.

c. Floor Slab Treatme nt

Prior to pouring concrete slabs apply ONE (1) gallon per square meteras an overall treatment.

d. Other Areas

Treat all voids found in masonry walls such as in concrete blocks andto all surfaces as in concrete blocks and to all surfaces before veneerfinish es are place with ON E (1) gallo n per linear meter. PVC pipesshould be treated with powd er form Aldrin.

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e. Wo od Drenching

Ceiling joists, runners, nailers, etc. wherein untreated lumber is used

shall receive treatment as deemed necessary by the termite proofingsubcontractor.

f. Term ite Mo und s

Demolish and treat all termite mounds within the property if any.

g. Bukbok Proofing

Kiln dried wood, plywood, tanguile, lauan, apitong, cabinets, dividersand paneling shall be brush with bukbok proofing chemicals beforepainting or varnishing.

3 .02 WARRANTY

The term ite proofing wo rk herein called for sh all be guaran teed for amin imum of FIVE (5) years with free sem i-annual check-up s and retreatmentin case of infestation.

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SECTION 02400 SITE DRA INAGE

PART 1 GEN ERA L

1.01 SCOPE

Furnish materials and equipment and perform labor required to completethe storm drainage external to the building.

1.02 PROTECTION

Protect materials from loss, injury or defacement. Lost or damaged materialsshall be replaced by the contractor at his own expense.

PART 2 PRO DUC TS

2.02 MATERIALS

a) Drainage pipes:

1. Plain conc rete drain pipe and fittings 10 in. and below indiameter: T & G conforming to AD TM C-14-59.

2. Reinforce d conc rete drain pipes fittings 12 in. and bigger:

Centrifugally cast or vibrated, T & G conform ingt o - A S T M C -7 6 -5 9 T.

b) Joining material - one part cem ent to two parts sand.

c) Building storm drain conne ction to ma in-concrete wye branch andclean out, T & G or used junction boxes.

d) Area drain catch basin - load - bea ring 4.8 Mp a (700 PSI) concretehollow blocks (CHB) or reinforced concrete as indicated in the

drawings with steel grating.

PART 3 EXECU TION

3.01 EXCAVATION

a) Excavation trenche s for all underg round pipe lines to required depths,slope and trades.

b) Rest/pipes on well tam ed solid bedd ing along its entire length.

c) Lay wa ter and sewe r pipes in separate trench es.

d) See SECTION 02200 : EARTH WO RK, ITEM 3.06.

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3.02 BACKFILLING

a) Pipe lines shall be tested by contra ctor and by Ow ner's representative

prior to backfilling.

b) Clean and free all excavation from trash and debris.

c) Backfill shall consist of the sam e mate rial excavated or otherapproved materials. Free backfill of the debris and big stones. Placebackfill in horizontal layers not exceeding 300 mm or as indicated ordirected.

e) Prope rly moisten each backfill layer and com pa ct by hand or ma chineto an optimism density that will prevent excessive settlement andshrinkage.

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DIVISION 3 CON CRETE

SECTION 03100 CONCR ETE FORMW ORK

PART 1 GEN ERA L

1.01 SCOPE

a. Furnish materials and equipm ent and perform labor required tocomplete all cast-in place concrete form work.

b. All work shall be done in accord ance with the minim um requirementsof the AM ERICAN CO NCRETE INSTITUTE BUILDING CODE FORREINFORCED CONCRETE ACI 318-88 except as modified herein.

c. Refer to the general conditions for all pertinent provisions.

1.02 PROTECTION

a. Provide adequ ately braced form s that will produ ce correctly alignedconcrete, able to meet the specific we ights and side pressure ofnewly placed concrete.

b. Choo se form fittings that are adeq uate to the purpose.

c. Exercise care in the choice of the surface form s and form fittings thatwill be in contact with concrete.

PART 2 PROD UCTS

MATERIALS

Forms

1. Use the plywo od, metal, or surfaced lumbe r form s whe re it will bestgive the most advantage in the specific concrete work involved.

2. For the beam s and colum ns, use not less than (12m m thick) plywoodforms for exposed concrete and 20mm T & G for covered concrete.

PART 3 EXECU TION

3.01 PREPARATION

a. Chec k all forms to the shape, lines and dim ensio ns of the mem bers ascalled for in the plans.

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2. Variation from the level or from the grade s indicated on the drawing s:

I. In floors (before remo val of form s), ceiling beam s, soffits and

rises:

In 3m 6m mIn any way or 6m max 10mmIn 12m or more 10mm

3. Variation of the linear building lines from the established position inplan and related position of columns, walls and partitions:

In any way or 6m max 12mmIn 12m or more 25m m

4. Variation in the sizes and location of sleeves, floor open ings andin thickness of s labs and wall open ings . . . . 6m m

5. Variation in cross-sectiona l dim ensio ns of colum ns and beam s and inthickness of slabs and walls:

Minus 6mm

Plus 12mm

6. Footings

I. Variation of dim ensio ns in plan

Minus 12mmPlus 50mm

(applies to concrete only and not to reinforcing bars or dowels.)

II. M isplacem ents of eccentricity, 5% at the footing wid th in the

direct ion of misplacem ent but not to exceed 50m m (applies toconcrete only and not to reinforcing steel and dowels)

III. Red uction in thickne ss:

Minus 5 of specified thickness

7. Varia tion in steps:

I. In a flight of steps:

Rise . .Thread

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II. In Con secu tive steps:

Rise 2mm

Thread 3mm


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DIVISION 3 - CON CRETE

SECTION 03160 STRUCTU RAL DECKING

PART 1 GEN ERAL

1.01 SCOPE

a. Furnish materials and equipm ent and perform labor required tocomplete all structural decking for all suspended slab in accordancewith the drawings.

b. All work shall be done in accord ance with the min imum requirem entsof the AM ERICAN INSTITUTE BUILDING COD E FOR REINFORCEDCONCRETE ACI 318-88 as positive reinforcement for composite slaband as per Manufacturer's specifications.

1.02 PROTECTION

Handling and Storage

a. Stack panels clear of the guard of the groun d with a fall or drainage.

b. Protect panels with wate rproof covering ensuring space is leftbetween the cover and panels to allow air to circulate.

c. Care mu st be taken wh en lifting long length bundles and it isrecom me nded that several lifting points be utilized to preventbuckling. When removing individual sheets from bundles, they shouldbe lifted directly and not dragged.

d. Provide adequ ate protection against corrosion through painting ofcorrosion inhibiting coats such as epoxy polyurethane type.

PART 2 PRO DUC TS

MATERIALS

The decking shall be cold formed section manufactured from highstrength hot dipped zinc galvanized steel of 0.75 mm thickness inaccordance with ASTM A446 Grade E and ASTM A525 G90. The basesteel shall have a minimum yield stress of 550 Mpa and minimumcoating mass of 275 gsm.

- 0.75m m thick CON DECK Panels by Construction Decking SystemInternational Corporation or equivalent. In case of other systems,submit technical literature and sample to the Engineer for review and

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appropriate design modification.

PART 3 EXECU TION

3.01 INSTALLATION

Cutt ing and Openings

Structural decking can be cut using a power saw with suitable disk. Whencutting, the panels should be turned over with the ribs downward. If holes oropenings are required, these are classified as follows:

a. Less than 250 m m (me asured at right angle s) req uires no specialtreatment. These holes or openings are usually for passage of othertrades or alternately they can be formed prior to the concrete pour,and once the concrete has attained 70% of its design strength, thepanel can then be cut out by a hole saw or drill .

b. For ope ning s of 250 -750 m m the dec king can be reinforced prior tothe concrete pour by using reinforcing bars or small channels, weldedto the panel around the perimeter of the opening; this distributes theloads to the adjoining panels.

c. For large prede term ined ope ning s greate r than 750 m m , such as for

stairs, elevators, etc., the most practical method generally is to supplysupplem ental framing to the support system for the structuraldecking.

Fixings

Dec kings shall be accurately aligned, side laps fully lappe d and the gapbetween the abutt ing ends kept to a minimum. Panels should be al ignedover the support ensuring a minimum end bearing of 50mm by sl iding theminto place with adjacent panels hard up against the precious one and the rib

overlapping the adjacent panel 's rib. After panels have been placed over thesuppo rts , they should be secured imm ediately against wind l if t. Wh erepanels are acting as a work platform, care should be taken not to overloadpanel after they have been erected. Heavy points should be distributed bym ean s of tim ber planking . Fix pane ls by use o f nail directly to beamformwork .

Propping

One or two lines of temporary props may be required in accordance with

manufacturer 's recommendation or as shown in the drawings. Propping shal lconsist of timber supported by a line of props adjusted to prevent settlementduring the concrete placement and curing. The propping must be designedto suppo rt the weight of wet concrete plus a tem pora ry construct ion load.

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Provide caneite or similar materials between the props and panels to reducethe effect of propping line since the exposed soffit will be used as ceiling.

Propping may be erected before or after the installation of the decking andshould be left until the concrete has reached sufficient strength of at least70% of its design strength.

Side Lap Joints

Side lap shall be fastened by 16mmXgalO Hex head self drilling and tappingscrews which can be placed either through the side or through the top of theribs at quarter points of the span.

3.02 Negative and Seco ndary Reinforcem ents

Negative and secondary reinforcements shall be provided in accordance withthe drawings. Sufficient tied lap splices shall be provided in both direction.

3.03 Inspection

No concre ting shall b egin until lapping, reinforcem ent placem ent andconnectors have been inspected and approved by the Engineer.

3.04 Concre te Placing

Decking panels must be clear of grease, oil and dirt. The concrete should beplaced continuously and if the placing is interrupted, the construction jointsshould be provided by stop boards located over suppo rting beams. Theconcrete should be placed in accordance with Section 03300 of thisspecifications. In addition, pouring shall be done parallel to the panels thisis very important

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SECTION 03200 CONCR ETE REINFORCEMENT

PART 1 GEN ERA L

1.01 SCOPE

a. Furnish materials and equipm ent and perform labor required tocomplete

steel reinforcing barsbars supports andmiscellaneous reinforcement accessories

b. All pertinent provisions of the Genera l Cond itions form part of thissection.

1.02 PROTECTIO N AN D STORAG E

Protect steel reinforcement adequately from rusting and store under cover.

1.03 TESTING

Test shall conform to ASTM Designation of specified materials.

PART 2 PRO DUC TS

2.01 MATERIALS

a. Stee l Bars

1. Sha ll be new and free from rust, oil, grea se, defects or kinks.

2. Shall conform to the latest edition of AST M Designation A61 5Specification for Deform ed Billet Steel Bars for Concrete

Reinforcement. Minimum yield strength shall be 275 Mpa formain bars including column ties, slab rebars and 230 Mpa forbeam stirrups of 10mm dia. and lower.

PART 3 EXECU TION

3.01 PREPARATION

a. Before placing reinforcement and before pouring of concrete, removeall loose rust, mill scale, oil, or other adhering materials which tend toreduce or destroy bond between concrete and reinforcement.

b. All bars shall be bent cold. Bends for stirrup s and ties shall shall bemade around pins with & diameter of at least twice the thickness of

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the bars; for bars 25m m and smaller, six tim es the thickne ss; for

larger bars, eight times the thickness.

3 .02 PLACING REINFOR CEME NT

a. Me tal Reinforce me nt

1. Placing shall be in acco rdan ce with the plans furnished. Referto the Engineer in case of doubt in placing of steel.

2. Reinforcing bars shall be accura tely placed and adequ atelysecured with concrete metal wires, or metal chair spacers.

3. Wire mesh reinforcem ent wh ere sho wn in slabs shall besecured in position by spacer bars and chairs. Spacer bars shallbe lapped not less than 125mm. In slabs on ground, precastconcrete blocks may be substituted for chairs.

b. Bar Spa cing

1. Spa cing of bars shall be don e in acco rdan ce with the ACI -Building Code or as follows:

Clear distance between parallel bars shall be one and one half

(1 Vi) time s the dia me ter of the bars.

2. Clear distance shal l not be less than 11 /3 t imes the maxim umsize of aggregate, nor less than 25mm.

3. W he re bars are used in tw o or mo re layers, the bars in theupper layers shall be placed directly above those in the lowerlayers at a clear distance of not less than 25mm.

3.03 OFFSET AND SPLICE REINFORCEM ENT

a. Splices

1. Gene rally, avoid splices in slabs, bea m s and girders at points ofmaximum stress. Splices may be allowed only as shown ornoted in the plans.

2. Splices in adjace nt bars shall be stagge red a min imu mdistance of forty (40) bar diameters.

b. Offsets

Where changes in cross section of columns occurs, longitudinal barsshall be offset in a region where lateral support is afforded.

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Where offset, the slope of the included portion shall not be morethan one on six (1:6) and in case of tied columns, the ties shall bespaced 75mm on center for a distance of 300mm below and above

the point of offset.

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SECTION 03300 CAST-IN PLACE CON CRETE

PART 1 GEN ERA L

1.01 SCOPE

a. Furnish material and equip me nt and perform labor required tocomplete

proportioningmixingplacementcuring andfinishing of concrete

b. All pertinent provisions of the Gene ral Cond itions form part of thissection.

1.02 PROTEC TION & STORA GE

a. Cem ent - Store dry, watertight, properly ventilated structure.

b. Aggreg ate - prevent from inclusion of foreign matter. Maintainstorage piles in a ma nner that will afford good drainage. Prevent

segregation of particle size.

1.03 DESIGN STREN GTH OF CON CRETE

All stren gth of conc rete shall be at least 24 M pa for slabs, stairs, beam s,columns, tie beams, and footings, and 21 Mpa for slab on fill , and 10 Mpa fortemporary encasement of dowel bars for all roof/floor/tie beams towardsphase 2 area, or as indicated on the Construction Notes.

1.04 TESTING AND ACCEPTA NCE

Testing and acceptance shall conform to applicable sections of ACI 318-88and as specified below.

PART 2 PRO DUC TS

2.01 MATERIALS

a. Cement

Use only one brand of cement throughout. Portland cement shallconform to th e Standard Specification s for Portland Cem ent(ASTM Designation C-150-latest revision) for type 1 Portland Cement.

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b. Concrete Aggregates

1. Use well graded, clean hard particles or gravel or crushed rock

conforming to the "STAN DARD SPECIFICATIONS FORCON CRET E AGG REG ATES" (ASTM Designation C-33 latestrevision).

2. M axim um size of aggreg ate shall not be larger than 1/5 of thenarrowest dimension between sides of the forms nor largerthan 3/4 of the m aximum clear spacing between reinforcingbars, and in no case larger than 33mm in diameter. Refer toConstruction Notes.

c. Water

Use water that is clean and free from injurious amounts of oils, acids,alkali, organic materials or other deleterious substances.

d. Conc rete Add itives

Additives shall subject to approval of the Engineer. Submit technicalspecifications of the proposed additives.

2 .02 MET HOD OF DETERM INING CONCRETE STREN GTH AND PROPORTIONS

a. Subm it mix designs obtained from samp les mad e in accordance with"STANDARD M ETHOD OF M AKING AND CURING CONCRETECOMPRESSION AND FLEXURE SPECIMENS" (ASTM Designat ion C192)and "STANDARD MET HOD OF TEST COM PRESSIVE STRENG TH OFMOLDED CONCRETE CYLINDERS" (ASTM Designation C-39) for eachstrength required stating the proposed slump and the proportionalwe ights of cem ent, saturated surface dry aggreg ates, and water.The se mixes shall be proved by prelim inary tests sufficient timebefore concreting and shall sho w a 28 day strength of 15 percent

higher than the ultimate required. No substitution shall be made inthe materials or mix without additional tests to show that the qualityof concrete is satisfactory.

2 .03 CONCR ETE PROPOR TIONS AND ACCUR ACY

a. Cem ent and Aggregates

Make proport ions so as to produce a concrete mixture which workreadily into the corners and angles of the forms and aroundreinforcem ent with the me thod of placing mate rials to avoidsegregation or accumulation of excess free water on the surface.

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b. Measurement

1. Me asure concrete ma terials such that the proportions can be

accurately controlled and easily checked at any time duringwork.

2. Confo rm me asure me nt of ma terials for ready mixed concreteto STANDARD SPECIFICATIONS FOR READY-MIXED CONCRETE.ASTM Designation C-94, whe re a pplicable.

3. Never exceed the wate r conten t by 6 U.S gallons per bag ofcem ent for all portions in the structure. Allow the job mixadjustm ent of water co ntent only on perm ission of theArchitect provided that cem ent is also add ed to keep theoriginal water-cement ratio of the design mix. Limit slumps tothe following:

Port ion of Structures Slump (mm)

Column s, beams, s labs 75-150Foundation elements, bedded 50-125slabs and cantilevered beamsand slabs.

2 .04 MIXING CONCR ETE

a. No hand mixing shall be allowed except in case of em ergen cy such asmixer breakdown during pouring operations and shall stop at firstallowed construction joint. All concrete shall be machine mixed for atleast 1 > minutes after all materials including water are in the drum.

b. Let the mixer be of an appro ved size and type wh ich will insure auniform distribution of material throughout the mass. Equip it with aDEVICE FOR ACCURATELY MEA SURING AND CONTROLLING THE

AMOUNT OF MIXING WATER IN EACH BATCH.

c. Place the materials in mixer in such a way that first batch of concretematerials shall contain sufficient excess of cement, sand, and water tocoat the inside of the drum without reducing the cement content ofthe mix to be discharged.

d. Never perm it retem pering of concrete .

PART 3 EXEC UTIO N

3.01 PREPARATION

a. Inspect and clean all forms and chec k all installations before placing

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concrete.

b. We t surfaces thoro ugh ly and grout before placing concrete.

c. Clean all laitance from previous pou ring and possibly aggregate sbefore renewing pouring.

3 .02 DEPOSITING CONCRE TE

a. Do dep ositing with out segreg ation, reha ndlin g or flow ing of concrete.Do it with the use of buggies, buckets, or wheelbarrows. Never allowuse of chutes except to transfer concrete from hoppers to buggies,wh eelb arrow s or buckets in wh ich case shall not exceed 6m inaggregate length.

b. In placing concrete, never let it drop freely for a height exceeding1.5m.

c. Keep conve yors full of concre te and keep end s buried in the new lyplaced concrete as pouring progresses.

d. Neve r allow placing of concrete wit hou t vibrators. Avoid segregationdue to over vibration.

e. Con struction Joints

1. If possible, do conc reting continuo usly, until section iscomplete. When stoppage of concrete operat ions occur, placeconstruction joints either horizontally or vertically as indicatedby the Engineer and be provided with shear keys or dowels todevelop bond.

2. Con sult drawing s and/o r Eng ineer as to details of construc tionjoints.

3 .03 CURING CONCR ETE

a. Finished Surface

1. Keep concrete con tinuo usly we t or mo ist for at least one we ekafter placing.

2. Begin curing as soon as conc rete has attained initial set.

3. Spray floors and vertical surface with an appro ved curingcompound.

b. Use curing additives for a min imu m of 48 hours.

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3.04 REPAIR OF CON CRE TE

a. Imperfections

1. Com plete repair within 24 hours after rem oval of forms.

2. Rem ove fins neatly from expo sed surfaces.

3. Rem oved dam aged or hone ycom bed concrete and replacewith drypack , rich mo rtar or conc rete with pea gravel toproduce a sound one.

b. Large Bu lges

Remove large bulges and abrupt i rregulari t ies by bush hammeringand grinding.

c. Dryp ack Filling

1. Use for holes having at least one surface dim ensio n less thanthe depth of the hole.

2. Fill with drypac k holes left by the rem oval of fasteners fromthe ends of tie rods; for grout and pipe recess; and for narrow

slots cut for repair of cracks.

3. Neve r use drypac k for filling beh ind reinforcem ent and forfilling holes that extend completely through the concrete.

d. Use mo rtar filling placed unde r imp act of mo rtar gun as drypac kfilling for holes to shallow for concrete filling and these holes shouldbe no dee per that the far side of the reinforcem ent nearest thesurface.

e. Con crete filling shall be used for: holes exten ding entirely throug h theconcre te for holes wh ich are greater in the are than 1 ,000 squarecentimeter and deeper than 10 centimeter and for holes in reinforcedconcrete which are greater in area than 500 square centimeters andwhich extend beyond reinforcement.

f. All ma terials, proce dures and ope rations used in the repair ofconcrete shall be as directed.

g. Fillings shall be bon ded tightly to the surfaces of the holes and shallbe sound and free from shrinkage, cracks and dummy areas, after thefillings have been cured and dried.

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DIVISION 4 - MA SONR Y

SECTION 04100 MOR TAR

PART 1 GEN ERA L

1.01 SCOPE

Furnish materials and equipment and perform labor required to complete

plaster, masonry work and patching mortar as shown in the drawingsand specified in the Summary of Materials and Finishes herewith.

PART 2 PROD UCTS

2.01 MATERIALS

a. Sand: AST M 35-67b. Port land Cement: ASTM C-150-67, Type 1c. Water: clean and free from deleterious substance s.

2.02 MIXES

Cement

1 part Portland Cement

2 parts sand,

but not more than

1 part Portland cement3 parts sand

PART 3 EXECU TION

Installation

a. Applica tion of Cem ent Plaster

1. Scratch Coat: Apply with sufficient force and materials to form fullkeys or bond. Cross scratch as soon as scratch has attained initial setand apply brown coat as soon as practicable.

2. Brown Coat: Scratch or broom for bond of finish coat and allow toset hard. Keep brown coat moist until finish coat is applied.

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3. Finish Coat: Bring to true, even surface with rods, dries and trowe lsmooth, leaving finished surface free from tool marks and blemishes.Keep cem ent plaster moist for at least 3 days and protect against

rapid drying until cured.

b. Applicat ion of maso nry mortar

Lay all solid and structural red bricks with 10mm thick horizontal andvertical mortar joints.

c. App lication of patching mo rtar

1. Provide the sam e mixture of gray and wh ite cem ents for patchingmortar used to fill holes and imperfections, but should be a stiffermixture and the cement and sand proport ions should be the same asthose used in the concrete.

2. Never steel trow el patches, but finish with w oo d or cork floats.

3. Allo win g the mixed patching mo rtar to stand for an hour or tw obefore using it reduces the amount of shrinkage but never add waterin remix it.

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SECTION 04200 UNIT MASON RY

PART 1 GEN ERA L

1.01 SCOPE

Furnish materials and equipment and perform labor required to completeunit ma sonry as indicated in the drawings, but not necessarily limited tointerior and exterior concrete block walls.

1 .02 HANDLING AND STORAGE

a. Hand le in a ma nner to prevent undu e chipp ing and breakage.

b. Provide platforms to protect bottom piles from contact with soil.

1.03 SUBM ITTALS :

a . Samples :

Within 35 days after award of contract, and before any concrete unitmasonry materials are delivered to the jobsite, submit one sample ofthe proposed concrete masonry units with the name and address ofthe manufacturer to the Architect for his approval.

b. Certific ation :

Upon delivery of concrete unit masonry to the jobsite, deliver to theArchitect a copy of the manufacturer's invoice stating among others,quantity and designed strengths of the concrete ma sonry unitsdelivered to the jobsite.

PART 2 PRO DUC TS

2.01 MATERIALS

1. NON -LOAD BEARING CON CRETE HOLLO W BLOCKS :

All non-load bearing concrete hollow blocks used in non-load bearingmason ry shall conform to the requirements of ASTM C-129-39, with aminimum compressive strength of 400 psi.

a . 150 X 200 X 400m m CHBb. 100 X 200 X 400m m CHB

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2 MORTAR

All mo rtar for concrete block shall conform to ASTM C-476-7 1,

2500 psi in 28 days, and shall consist of one part portland cement byvolume, 1/4 part hydrated lime, and 3 parts of damp, loose sand, pluswater.

3 . REINFORC EME NT ST EE L:

All reinforcement steel for concrete masonry units shall be structuralgrade, billet steel deformed bars conforming to the requirements ofASTM A-615 with yield strength of 230 Mpa.

4. WAT ER :

Water used in mixing mortar shall be clean and free from injuriousam oun ts of oils, acids, alkalies, salts, organic mate rials, or othersubstances that may be deleterious to concrete or steel.

5 . GROUT:

All grout shal l be machine-mixed in accordance with ASTM C-94 andshall consist of one part portland cement, 2 1/2 parts sand, 2 partspea gravel, an d adeq uate wate r to produ ce a concrete of

app roxim ately ten inches slum p, and shall have an ultimatecompressive strength of 2000 psi in 28 days.

6 . ADMIXTURES:

Adm ixtures may be used only with the wri t ten approval of theArchitect.

PART 3 EXEC UTIO N

3.01 MIXING MOR TAR :

a . Genera l :

1. Use a me chan ical mixer of one bag min imu m capacity.

2. Mix mo rtar at least three minu tes after all materials have beenadded. The actual mixing shall not be less than two minutes.

3. Mix only as muc h mortar as can be used in on e hour after water has

been first mixed into the batch.

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b. Retemper ing:

Do not retemper mortar.

3.02 INSTALLA TION :

a . Genera l :

1. Lay up all walls in running bond, plum b, level, and true to the linesand dimen sions indicated on the Drawings.

2. Do not used chippe d or broken units; if any such units are discoveredin the finished wall, the Architect may require their imm ediateremoval and replacement with new units at no additional cost to theOwner.

b . Dampen ing :

Dam pen , but do not saturate, all concre te m asonry units,immediately before installation.

c. Layin g Up :

1. Place all units in mortar with full shov ed bed and head joints.

2. Align all vertical cells to ma intain a clear, uno bstructe d system offlues.

3. Provide clean-o uts at the bottom of each cell for rem oving mo rtardroppings; do not close the clean-outs until they have been inspectedand approved by the Architect.

d. Reinfo rcem ent :

1. Install all reinforcem ent as indicated on the Draw ings.

2. Em bed reinforcem ent in grout, not in mo rtar or mo rtar joints.

e . Tooling:

Tool all joints to a dense, smooth surface.

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3.03 GRO UTING :

a . Genera l :

Perform wall grouting in strict accordance with the provisions for highlift grouting as described in Chapter 24 of the Uniform Building Code,1970 edition.

b . Timing:

Do not grout until masonry has cured at least 24 hours.c . Consol ida t ion:

Consolidate all grout at time of pouring by puddling with steel rod,filling all cells of the maso nry, and the n recon solidating later bypuddling before the plasticity is lost.

3.04 CLEA NING UP :

a. Inspect ion and Ad justm en t:

Upon comp let ion of the work of this Sect ion, make a thoroughinspection of all installed concrete unit masonry and verify that allunits and all joints have been installed in acc ordan ce with the

provisions of this Section; make all necessary adjustments.

b . Cleaning:

1. Clean all surfaces of the concrete unit m ason ry as required for properapplication of the specified finishes.

2. Upon com plet ion of al l work of this Sect ion, promp tly remove fromthe jobsite all mortar droppings, broken units, debris arising fromwo rk of this Section, and all tools and equ ipm ent of this Section,

leaving all areas in a neat and orderly condition to the approval of theArchitect.

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DIVISION 5 - METALS

SECTION 05100 STRUCTU RAL STEEL

PART 1 GEN ERAL

1.01 SCOPE

Furnish material and equipment and perform labor and services required tocomplete fabrication and erection of all structural steel.

1.02 SHOP DRAW INGS

a. In accorda nce with the requirem ents of the G eneral Conditions,furnish complete detailed fabrication and erection shop drawingsincluding details of all connections for review and approval of theArchitect.

PART 2 PRO DUC TS

2.01 MATERIALS

a. Conform all materials and wo rkm ansh ip to the requirem ents of theAmerican Institute of Steel Construction, "Specifications for Design,Fabrication and Erection of Structural Steel for Buildings" as amendedto date or as may be specifically modified by the drawings or by thesespecifications.

b. Conform structural steel plates and shape s to AST M Designation A33with a specified yield point of 230 Mpa.

c. Conform weld ing electrodes for ma nual shielded metal-arc welding toE60 series of ASTM Specifications A233 and to AWS Specification A5.1

& A5.5.

d. Conform bolts to the specification for Low Carb on Steel Externallyand Internally Threaded Standard Fasteners, ASTM A307.

e. Use only approv ed brand of red lead paint and linseed oil for all shoppainting for structural steel.

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PART 3 EXECU TION

3.01 WELD ING TECH NIQUE

a. Conform the technique of welding emp loyed, the appearance andquali ty of welds made, the methods used in correct ing defect ive workto the requirements of the Standard Code for Welding in BuildingConstruct ion of the Am erican We lding Society.

b. Ma ke surface to be we lded free from scale, slag, rust, grease, paintand any othe r foregoing material e xcept that m ill scale wh ichwithstands vigorous wire brushing may remain.

c. Prepare edge s by gas cutting, wh en eve r practicable, cut by amechanical ly guided torch.

d. Let gas cut edge s wh ich will be subje cted to substantial stress orwhich are to have weld metal deposi ted on them be free fromgouges. Remove by grinding any gouges that remain from cutt ing.

e. Sh ap e all re-entrant corne rs notch free to be a radius of at least12mm.

f. Bring in to a close contact as practicable parts to be fillet we lded andin no event separate by m ore than 5m m . If the sep aration is 1.5m mor greater, increase the size of the fillet welds by the amount of theseparation.

g. Never exceed the separation betw een laying surfaces of lap joints andbutt joints on a backing structure by 1.5mm.

h. Bring the fit of joints at contact surfaces wh ich are not com pletelysealed by welds, close enough to exclude water after painting.

i. Align all abutting parts to be we lded carefully. Correct misalign me ntgreater than 3mm and in making the correction, never draw partsinto a s lope sharper than two (2) degrees (11mm in 300mm).

j. Position the wo rk for flat we lding wh en eve r practicable.

k. In assem bling and joinin g parts of structure or of built-up me mb ers,avoid needless distortion and minimize shrinkage stresses. Where it isimpossible to avoid high residual stresses in the closing welds of ar igid assembly, make closing welds in compression elements.

I. In the fabrication of cover plated bea ms and build-up me mb ers, mak eall shop splices in each component part before such component partis welded to other parts of the member.

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m. Let all com plete penetration butt we lds by m anu al we lding exceptwhen produced with the aid of backing material or welded in the flatposi t ion from both sides in square-edge material not more than 8mm

thick with opening not less than one-half the thickness of the thinnerparts joined, have the root of the initial layer gouged out on the backside before weld ing is started on that side. Weld so as top securesound metal and co mplete fusion th rough out the ent ire cross-section. With butt weld s made with use of a backing of the sam ematerial as the base metal, have the weld metal thoroughly fusedwith the backing material.

n. Backin g strips may be rem oved b y gou ging or gas cutting afterwelding is completed, provided no injury is done to the base metaland weld metal.

o. Term inate butt weld s at the ends of a joint in a ma nne r that willensure soundness. Where possible, do by the use of extension bars orrun-off plates. Rem ove extension bars or run-off plates uponcom plet ion of the weld. Make the ends of the weld smoo th andflushed with abutting parts.

3.02 BOLTS

a. Tigh ten all bolts to a bolt tension not less than the proof load given in

the applicable ASTM Specifications for the type of bolt used.

b. Do not tighten ing with properly calibrated wre nch es or by theturn-of-nut method.

3 .03 TOLERANCES

a. Let all structural me mb ers of single rolled shap e and built-upme mbe rs fabricated by r ivet ing or welding, unless otherwisespecified , be straight within the toleran ces allowed by AS TM

Specification A6.

b. Never let comp ression mem bers deviate from straightness by morethan 1/100 of the axial length betw een points wh ich are to belaterally supported.

c. Let com pleted me mb ers be free from twists, bend s and open s joints.Sharp kinks or bends shall be the cause of rejection of materials.

3.04 SHO P PAINTING

a. Clean all steelwo rk specified for painting by hardw are brushing, orother methods chosen by the fabricator for cleaning loose mill scale,loose rust, weld slag, or flux deposit, dirt and other foreign matter

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after inspection, approval, and before leaving the shop.

b. Give all steelwo rk except thos e to be enc ased in concrete one coat of

shop paint.

c. Rem ove oil grease depo sits by solvent.

d. Do not paint steelwo rk that is to be encased in concrete. Clean oil orgrease or with solvent cleaners. Remove dirt and foreign materials bythorough sweep ing with a f iber brush.

3.05 INSPECTION

a. Sub ject ma terial and wo rkm ansh ip at all tim es to the inspection ofthe Architect.

b. Inspectio n of we lding shall be perfo rme d in accord ance with theprovisions of Section 6 of the Standard Code for Welding in BuildingConstruct ion of the American W elding Society.

c. Test - Non destructive tests shall be used if nece ssary to determ inethe distribution of weld defects.

1. Radiog raphic inspection or Ultrasonic inspectio n.

3.06 IDENTIFICATION

a. Mark to identify the AST M Spe cification s of steel for maincomponents .

b. Identify such steel in com pleted m em ber s or assem blies by paintingthe design ation of the piece over any shop coat of paint, prior toshipment from fabricator's plant.

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SECTION 05170 MISC ELLAN EOU S METALS

PART 1 GEN ERA L

1.01 SCOPE

Furnish material and equipment and perform labor required to complete allmetal work which include:

a. Steel gussets, sag rods, turnbu ckles, shear plates, erection plates andangles, etc. for roof framing system

b. Steel win dow s and grillesc. Steel Frames and facing for doorsd. Han drails and railings

See drawings for sizes, details and location of work required.

PART 2 PRO DUC TS

2.01 Rolled Steel Plates and Sections - ASTM Specification A3 3

2.02 Refer to Sum m ary of Materials and Finishes

PART 3 EXECUT ION

3.01 WORKMANSHIP

a. Ma ke all work well form ed to shap e and size show n and assem ble asdetailed.

b. Cut, shear and punch to produc e clean, true line and surfaces withburrs removed.

c. Weld or bolt conne ctions as indicated. Use countersun k screws inrecessed work where possible. Make all details of assembly strong

with sufficient stiffness. Form joints exposed to weather in a mannerto exclude water.

d. Provide all work with proper clearance s. Fabricate and install in ama nner to provide for expan sion and contrac tion but will insurerigidity and provide close fitting of sections .

e. Fabrica te and install as directed by the Ma nufactu rer.

f. Provide a protective coating wh ich is resistant to alkaline, mortar and

plaster to be applied to all sections after fa brication.

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DIVISION 6 - CARPENTRY

SECTION 06100 ON-SITE CARP ENTR Y

PART 1 GEN ERAL

1.01 SCOPE

a. Furnish materials and equipm ent and perform labor required tocom plete wo oden framings and related rough carpentry work asindicated in the drawings and/or specified herein.

b. Include in the wo rks, nailing strips sca ffoldin g, plates, straps, joists,hangers, rods, dowels, rough hardw are, fasteners and othermisc ellaneou s iron and steel items pertinent to rough carpentrywork.

1.02 STORA GE AND PROTECTION

a. Stack farm ing lumber to insure against deform ation and maintainproper ventilation.

b. Protect lumbe r from elemen ts.

c. Lum ber in contact with concrete or ma sonry shall be coated with 2(two) coats of asphalt, applied hot.

d. Tem porary protection

1. Provide and maintain tem porary protection of the wo rk as requiredto safeguard com pleted or partially co mp leted work during theprogress of the construction.

2. Provide all the ne cessary rough stairs ladders, runaw ays, forconvenient access to all parts of the building until other permanentfacilities are in place.

PART 2 PRO DUC TS

2.01 LUMBER

a. Mo isture Content Not to exceed 18 percent.

b. All lumber, excluding scaffoldings, to be pressure treated, conform ingto 67% stress grade lumber in accordance to the requirements of thePhilippines National Building Code, latest edition.

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c. Refer to draw ings show ing Ma terials and Finishes.

d. Subst i tut ion of Lumber

Any lumbe r equally good for the purpose intended may besubstituted for kinds specified, provide, however, that thesubstitution be authorized in writing by the Architect.

2 .02 ROU GH HARD WA RE AND METAL FASTENERS

Plates, straps, nails, spikes, bolts , joists, hange rs, rods, do wels, fasteners andmisc ellane ous iron and steel item s shall b e of sizes and types to rigidlysecure member in place.

PART 3 EXEC UTIO N

a. Fit carefully mo rtise and teno n joints of all fram ings including tong uesand grooves of sheathing. Anchor al l f rames coming in contact withconcrete, unless otherwise specified, by means of 20 D nails,, spacedthe contact surfaces. Plane and dress side of frames that will receivethe wallboards of sidings.

b. W ood nailers shall be in acco rdan ce with detail draw ings. Wh ere notindicated on the drawings or mentioned herein, nailing strips shall be

1 x 2" spac e at 0.40 m. on centers both w ays. Fasten securely byexpansion bolts or other approved device at every 0.6 m. on center.

c. Make all expo sed nails coun tersunk . Do scribbling , mitering a ndjoining accurately and neatly to conform to details.

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SECTION 06220 MILLWORKS

PART 1 GEN ERA L

1.01 SCOPE


Wood jambs

Wood shelvings

Cabinets

Wood slats

Ceiling boards and wall panels

Wood tr ims

And related finish carpentry work as indicated on the drawings and/orspecified herein. Coordinate work will all other related trades.

1.02 STORA GE AND PROTECTION

a. Protect millwork against dam pness during and after delivery.

b. Do not bring in interior finish, inclu ding door s, into building untilplaster is thoroughly dry.

PART 2 PRO DUC TS

2.01 LUMBER

In dried quarter sawn containing not more than 14% moisture, free fromimperfections impairing its strength and finish.

2.02 PLYWOOD

For interior plywood, use Class A plywood whose specie and thickness shallconform to schedule and drawings.

2.03 FINISH HARD WA RE

For cabinet , see SECTION 08710 FINISH HARDWARE

2.04 Refer to Sum m ary of Materials and Finishes.

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PART 3 EXECU TION

3.01 WORKMANSHIP

a. Make all wo od finish, and millwo rk true to details, clean and sharplydefined.

b. Set pane ls to allow for free m ove m ent in case of swelling orshrinkage.

c. Con ceal me ans of fastening various parts together.

3.02 FINISH

a. Mill, fabricate and erect interior finish as indicated on the drawing s.Machined sand at the mil l and manual smooth at the job.

b. Sep arate with % inch stone-cu t joints all interior trims set againstconcrete, masonry or wood.

c. Make joints tight and in a ma nne r to con ceal shrinkag e. Secure trimwith fine finishing nails, screws, or glue where required.

d. Set nails for putty stop ping .

e. Make win dow and door t r im single length.

f. Miter mo uldings at corner, cope at angles.

3 .03 WO OD JAMB S

a. Set do or fra m es plum b and level and brace until built-in.

b. Anch or wo od frames to masonry with approved metal anchors on

each side of jam b. Place top and bottom a ncho rs (0.2m) 8 inchesfrom head and floor.

3 .04 WO OD SHELVING

a. Each shelf shall be supp orted on a con tinuo us wo od cleat walls.

b. Secure cleats to ma sonry walls by expa nsion bo lt or approve dfastening devise.

3.05 BUILT-IN CABINE TS AND CLOSETS

a. Fabricate cabinets and closets in acco rdan ce with details.

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DIVISION 7 -T H ER M A L & MOISTURE PROTECTION

SECTION 07100 WATERPR OOFING

PART 1 GEN ERA L

1.01 SCOPE

Furnish all materials and equipm ent and perform labor required tocomplete:

1. Integral wate rproofing for all concrete flashing of metal and clay tileroofing.

2. Wa ter proofing of all concrete gutter, planter box, and suspende dfloor slab of toilets and all roof decks.

See draw ings and details for location and extent of the w aterproofingrequirements.

PART 2 PRO DUC T

2.01 MATERIALS

Refer to detailed drawings showing Materials and Finishes

-Waterproofing Membrane

PART 3 EXECU TION

3.01 Deliver wa terproo fing materials to the site in original sealed containers orpackag es b earing the m anufacture r's nam e an d brand designation,specification number, type and class.

3.02 Store and protect wate rproofing ma terials from dam age, wea ther moistureand extreme temperature with extraordinary care.

3.03 Clean, free from holes and projections, sm ooth and dry all surfaces toreceive waterproofing materials. The Contractor shall perform the necessarysurface preparation. Immediately before application of waterproofing, cleansurface and secure approval. No application of waterproofing is permitted inwet weather.

3.04 All wo rk under this Section shall be perform ed in accordan ce to

Manufacturer's specifications.

3.05 W here curing of wate rproofing is required, cure strictly in accordanc e to theManufacturer's specifications. Allow foot traffic only after complete curing.

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SECTION 07320 TILED ROO FING

PART 1 GEN ERA L

SCOPE

Furnish materials and equipment and perform labor required to complete.

Fitting and in stallation o f Fish-scale shee t tiles for eave s and stairroofing, wire strap/anchor units as well as the installation ofsupplementary materials to make the roof watertight and leakproof.

See draw ings and details for sizes and location of wo rk required.

PART 2 PROD UCTS

MATERIALS

a. Fish-sc ale sheet roof tiles shall be as per spec ificatio n of the IndustrialTechno logy D evelopm ent Institute, Dep artm ent of Science andTechnology, as man ufactured by . Nom inaldimension of the sheet t i le shall be 15m mx2 00m m x380mm withbreaking strength of Mpa .

b. Anch or/strap wire ties shall be galvanized of at least gauge 16thickness fastened securely to 25x30x3mm angular battens. At leasttwo (2) lengths of wire should anchor a single tile or one (1) ga. 16wire section should be provided per 0.03sqm of tile or roof claddingelement (flashing or ridge cap) or provide one (1) ga. 16 wire as tiedown spaced at 150 mm on centers.

c. Anc hor nails/screws shall be galvanized of sufficient size to be able tofasten effectively size to be able to fasten effectively each tile to thetreated 25mmx50mm wooden battens anchored on concrete slab.

PART 3 EXECUT ION

FISH-SCALE SHEET ROOF TILES

a. Install the first row of fish-sca le roof tiles startin g from the eaves.

b. Install succee ding tiles over the previous in a staggered fashion. Referto detailed drawings.

c. An cho r each tile using wire ties or screws in accord ance with PART 2.

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SECTION 07400 METAL ROOFING

PART 1 GEN ERA L

SCOPE

Furnish materials and equipment and perform labor required to completefitting and installation of ribbed metal roofing, flashing com ponen ts, strapand rivet units as well as the application of supplementary materials to makethe roof watertight and leakproof.

See draw ings an d details for sizes and location of work required.

PART 2 PRO DUC TS

MATERIALS

15 x 200x 400mm Fish Scale Roofing Tiles

Substrate Metal: Galvanized steel sheet, using annealed and tempered coldrolled steel coils hot-dipped to PNS 67:1986 Standard (i.e at least 215 g/m2).

Protective Coatings: Zinc phosphate of at least 0.4 microns.

Primer of epoxy/urethane of at least 3.5 microns Topcoat of oil-freepolyester of at least 6.0 microns

All costs oven-baked to meet properties of J IS G 3312 Standard including saltspray test duration of at least 500 hours.

PART 3 EXECU TION

3.01 ROO FING SHEETS

a. Lay dow n the ribbed roofing tiles starting from the end opposite theprevailing wind.

b. Lay and install the first sheet with the turne d dow n edge towards theoutside of the area to be covered.

c. Overlay the next sheet in such a ma nner that the exposed edge isturned down and the covered edge is turned up.

d. Fix the strap according to indications show n in the manufacturer's

catalogue.

e. Fasten the roofing sheets to the steel purlins by mea ns of strapsriveted to roofing tiles and wrapped around purlins.

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f. Side lap fasteners shall be done by rivets and wa shers paced from 12"to 18" on centers.

3 .02 GUT TER, FLASHING, AND COUNT ER FLASHING

a. Provide gutter, flashings and coun ter flashings, gaug e 0.600 mm pre-painted galvanized sheets any app roved equiva lent, atall critical points where water may seep through.

b. See draw ings as to the details of the gutter, flashing andcounter-flashing.

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DIVISION 8 - DOORS & WIND OW S

SECTION 08100/08510 STEEL WIN DOW S AND DOORS

PART 1 GEN ERAL

1.01 SCOPE

Furnish materials and equipment and perform labor required to complete:

A. Steel casemen t window s

B. Wo od doors

See drawings and details for sizes, location extent and other requirements.

1 .02 SHOP DRAWINGS AND SAMPLES

a. Subm it for approval of the Architect, shop draw ing of fabricateditems show ing sizes of all me mb ers, details of conne ctions,fabrication and installation.

b. Subm it sam ples of the corner section for doors and jam bs.

c. Secure approval of all shop draw ings prior to start of fabricationwork.

PART 2 PRO DUC TS

2.01 Steel Casem ent Window s

All Steel casement windows shall be the sizes shown on the drawings, lowcarbon hot-rolled steel frame. Vent sections shall be mitered and electrically

welded with exposed surfaces ground smooth. Each vent shall have a solidbrass, polished, camlocking handle and strike. All steel casement windowsshall be shop-finished with a dip coat of dark red primer.

2.02 Swin g Tubular Steel Doors

Stiles and rails shall be constructed of 14 gauged pressed steel tube with lockseam. Steel panels shall be constructed from 16 gauge annealed and patentleveled she ets. Corners shall be we lded constru ction with all joints faceweld ed and groun d smo oth. Glass panel mo untings, designed for insideglazing with steel clips and bed putty, shall be securely and neatly welded torails and stiles. All doors and frames shall be thoroughly cleaned of rust andscales and shall be giver two coat of dark red primer.

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SECTION 08200 WO OD DOORS

PART 1 GEN ERA L

1.01 SCOPE

Finish materials and equipment and perform labor required to complete:

louver doors

flush doors and other wood doors

See drawings and details for sizes, location, extent and other requirements.

1.02 SAMPLES

Submit sample corner sections of wood doors and jambs, for approval of theArchitect.

1.03 PROTECTION

Protect doors adequa tely from scratches, and other stains with heavybuilding paper.

PART 2 PROD UCTS

2.01 MATERIALS

Refer to the Summary of Materials and Finishes

2.02 FABRICATION

a. Asse mb le joints in doors with water-resista nt glue. Keep doors underpressure until glue has thoroughly set.

b. San d sm ooth finished door. Provide doors with joints and clean outcut mouldings.

c. Keep faces from defects or ma chine marks that will show through thefinish.

d. Flush Doors Hollow Core:

Provide doors with cross bonding and edgings. Make face veneer firstquality selected plywood or lawanit as directed in the drawings or asspecified herein. Provide lock blocks of size required for hardwareused.

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PART 3 EXEC UTIO N

3.01 INSTALLATION

a. Cut, trim, and fit each doo r to its fram e and hardw are accurately.

b. Give allow ance for painter 's finish and possible swe lling or shrinkage.

c. Provide not mo re than 1/8 inch clearan ce at lock and hang ing stilesand not more than % inch at bottom.

d. Ro und all corn ers to 1/16 inch radius. Bev el sligh t lock and rail edg es.

e. All doors shall operate freely and all hardw ares shall be properlyadjusted and functioning.

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SECTION 08520 ALUM INUM WIN DOW S

PART 1 GEN ERAL

1.01 SCOPE


Steel Casement Windows

See drawings and schedules for size, details and location of required work.

1.02 SHOP DRAW INGS AND SAM PLES

a. Subm it shop drawings and secure Architect 's approval.

b. Subm it sam ple corner sections, hinges, tracks, handles and all otheraccessories.

PART 2 PROD UCTS

2.01 MATERIALS

Clear Glass Steel Casement Window (5.5mm thick clear glass)

PART 3 EXECU TION

3.01 FABRICATION

a. Factory prefabricate all fram es in acco rdance with the design anddimensions indicated in the drawings.

b. Cut join and fit rails and stiles to hairline s join ts secure ly reinforcedand jointed by means of concealed fastening wherever possible.

c. Protective Coating

Clean all surface and apply a protective coating of clear, water-whitemethacrylate type lacquer, resistant to alkaline mortar and plasterimmediately after fabrication and may not be even after completionof installation.

3.03 INSTALLATION

a. Set and anchor frames as sho wn in details and in approved shopdrawings.

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b. Set fram es plum b and square and brace wh ere nece ssary to preventdistortion.

c. W edg e clear of ma sonry all fram es set in prep ared ope ning s 3/16 to% inch to allow for caulking.

3 .04 ADJUSTMENTS

a. Adju st all fram es and attach hardw ares before glazing.

b. Secu re all win dow s and doors to be wa tertight and all hardw areoperating free and easy.

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SECTION 08710 FINISH HARDW ARE

PART 1 GEN ERAL

1.01 SCOPE


Finish hardware for doors and windows

1.02 SAMPLES

Submit samples of locksets, hinges, door pulls, door stops, door closers and

other finish hardware and accessories for Architect 's approval.

PART 2 PRO DUC TS

2.01 MATERIALS

A. Locks

1. All steel doors and other doors specified in the schedu le of doors andwindows shall be equipped with "ASSA" double cylinder locksets orany approved equivalent. Cylinder lock to be equippe d with latchbolts operated by lever handles and dead bolt operated by key leverhandles and dead bolt operated by key or thumb-turn on inside andkey from outside.

2. Other Door sashes as specified in the sched ule of doors and window sshall be provided and fitted with a set of cylindrical unit lockset 26Dfinish and to conform to the following schedule:

Lockset Types Function

Lever Type All Room s

Panic Device Fire Exit Door

B. Latches

Bar doors for shower and toilet compartments shall be provided and fittedwith rim bolt and an indicator, chromium plated and polished.

C. Hinges

1. All steel door with steel facing shall be provided with three heavysteel hinges.

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2. All steel doo r with glass panel shall be provid ed with heavy duty pivothinges to be fixed on top and bottom rails.

3. Butt hinges

Each panel of hinged door shall hung on three (3) butts for doors 1.80or less in height and four (4) butts for doors 2.10 m in height. The sizeof the butt hinges shall co nform to the Sch edu le of Doors andHardwares.

4. Concealed Hinges

Cabinet closet and building special t ies doors shal l be provided andfitted with a set of concealed hinges.

2 .02 MISCELLANE OUS DOOR HARDW ARES

a. For doors that will strike on objec t rubbe r bum per provide or doorstop. Type and location of installation to b e app roved by theArchitect.

b. For heavy frequ ency doo r with closer and mo rtise locks providestainless steel push plates.

c. For dou ble leaf wo od en provide 2 flush bolts 18" long.

d. For silencing the doo r wh en it strikes the stop strip and to preventrattles, install three (3) silencers in the stop of fram e.

PART 3 EXEC UTIO N

INSTALLATION

Install hardw are to fill details sho wn in the draw ings and as per

man ufacturer 's specif icat ions. Supply al l necessary templates andinstructions required.

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SECTION 08730 WEATHER STRIPPING

PART 1 GEN ERAL

1.01 SCOPE


all type s of w eatherstripping in the form of rubber and vinyl strip andcaulking

1.02 Subm it sam ples of wea ther strip elem ents for approva l by the Architect.

PART 2 PRO DUC TS

MATERIALS


PART 3 EXECU TION

a. Install on all exterior doors and win dow s open ing to render themwatertight.

b. Install on all interior doors to silence door.

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SECTION 08800 GLASS AN D GLAZING

PART 1 GENERAL

1.01 SCOPE

Furnish glass free from imperfection and water marks and other materialsand equipment and perform labor required to complete all glass and glazingwork.

See drawings for size, location and details.

1.02 SAMPLES

Submit samples of glass panels

1.03 PROTECTION

Protect material from loss, injury, staining and breakage.

PART 2 PRODUCT

GLAZING

a. Glazing materials for glass installation may be:

1. Bulk com poun ds such as:

Mastics - elastic compounds and non skinning compound.

Putties - wood sash putty, metal sash putty.

Sealants - one components.

2. Performed Sealants such as:

Synthetic polymer- base sealants- resilient or non- resilient type.

Preformed gaskets- compression type, structural type.

PART 3 EXECUT ION

3.01 GLAZING

a. Prevent glass from all contact with metal or any hard or sharpmaterials by use of resilient shims placed at quarter point.

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b. Use resilient sealants.

c. Use stops in sizes perm itting a "good grip" on the glass.

d. Install glass only in ope ning s that are rigid, plum b and square.

e. Allow sufficient clearan ce at edge s of glass to com pen sate for itsexpansion or for some settlement of the building. Clearance shouldbe % inch from edge and 1/8 inch for face.

f. Rem oval of putty or glazing com po un d sm ears from glass shall beperformed by the glazing contractor during the material 's normalwork life. Failure to do so may result in damage to the glass.

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DIVISION 9 -FINISHES

SECTION 09220 CEM ENT FINISHES

PART 1 GEN ERA L

SCOPE


all:

Plain cement plaster finish

See drawings for details and location of work required.

PART 2 PRO DUC T

MATERIALS


PART 3 EXECU TION

3.01 PLAIN CEM ENT PLASTER FINISH

a. Provide all wall indicated with three coats of cem ent plaster (scratchcoat brown coat and finish coat). Mix each coat in the proportion ofone part portland cement o three parts sand by volume.

b. App ly the scratch coat with sufficient ma terial and pressure to ensurea good bond and then scratch to a rough surface. Provide a thicknessof 3/8" for scratch boat. Dampen with water before applying browncoat.

c. App ly brown coat, one day after applying scratch coat, with athickness of 3/8" and level to a flat even surface. When stiff enough,trowe l with a woo den float and cross hatch or broom lightly andevenly to secure a good mechanical bond for the finish coat. Wet thesurface and keep from drying out for at least three (3) days.

d. App ly finish coast seven (7) days after the application of brown coat.Provide thickness of 1/8', keep the finish coat damp but not saturatedfor a period of seven (7) days.

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SECTION 09310 /09390 CERAM IC/CEM ENT TILEWORK

PART 1 GEN ERA L

1.01 SCOPE

Furnish materials and equipment and perform labor required to complete alltypes of tile works.

See drawings and details for location and extent of work required.

PART 2 PROD UCTS

MATERIALS

1. 3 00 x3 00 Unglazed Ti les2 . 3 0 0 x3 0 0 Carpet Ti les

3. 800 x 800 Granulithic Tiles

Refer to Summary of Materials and Finishes

PART 3 EXECU TION

3.01 APPLICATION OF SCRATCH COAT

a. Thoro ughly dam pen, but not saturate, surface of ma sonry or concretewalls before applying the scratch coat. Ma ke surface areas appearslightly damp. Allow no free water on the surface.

b. On masonry, first apply a thin coat with great pressure, then bring itout sufficiently to compen sate for the ma jor irregularities on themasonry surfaces to a thickness of not less than % inch at any point.

c. Evenly rake scratch coats, but not wa sh coats, to provide good

mec hanica l key for subsequ ent coats before the mortar has fullyhardened.

d. On surfaces not sufficiently rough to provide good me chanical key,dash on the first coat with a w hisk broom or fiber brush using astrong whipping motion. Do not trowel or otherwise disturb mortarapplied by dashing until it has hardened.

3.02 FLOOR TILE INSTALLATION ON MORTAR BED

a. Before spread ing the setting bed, establish lines of borders andcenter the fieldwork in both directions to permit the pattern to belaid with a minimum of cut tiles.

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I. W ithin 1 hour after installation of tile, rem ove strings from string-settile and wet the faces of face-mounted tile and remove the paper andglue. Avoid using excess water. Adjust any tile that is out of

al ignment.

3 .04 GROUTING

a. After tile has sufficiently set, force a m axim um of grout into joints bytrowel, brush or finger application.

b. Before grout sets, strike or tool the joints of cush ion-ed ged tile to thedepth o f the cushion.

c. Fill all join ts of squ are -ed ged tile flush w ith the surfac e of the tile. Fillall gaps or sips.

d. During grou ting clean all excess grout off with clean burlap, othercloths or sponges.

3.05 CLEANING

Spo nge and wash tile thoro ughly with clear wate r after the grout hasstiffened. Then clean by rubbing with damp cloths or sponges and polishclean with dry cloth.

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SECTION 09650 VINYL FLOOR FINISH

PART 1 GEN ERA L

SCOPE

Furnish materials and equipment to perform labor required to complete all:

Vinyl Floors as shown in the drawings.

PART 2 PROD UCT

MATERIALS

Where shown or scheduled in the drawings, all floors finished with vinyl tilesshall be constructed 3mm or 4mm below the finished floor levels and shallbe trow eled to a smo oth and even surface free from pits, visible joints,marks or other imperfections. Tiles to be used shall be Vinyl QuartzTiles or equivalent, 3mm. In thickness and shall be of dimension, color andlaying pattern to conform to the schedule as indicated in the drawings.

PART 3 EXECU TION

A. Preparation of Surfaces

Clean the floor thorou ghly of dirt, grease, paintdrops, etc., leaving thesurface suitab le for the installation of the tiles. Th e resulting surface shall besmooth, even thoroughly dry and clean.

B. Laying

Before tiles are laid, apply over the surface a coat of asphalt emu lsion inaccordance with the manufacturer's specifications. In laying the tiles overthis emulsion coat, the edges of the tiles shall be carefully matched and the

seems cut. All seams and edges shall be cemented with asphalt cement. Thesurfa ce of the finishe d floor shall be left sm oo th, clea n and in first classcondition.

C. Cleaning , Wa xing, Polishing

At completion of the work, clean all vinyl tiles and remove all cement, dirt orother foreign substance. Apply two coats of emulsion wax and polish eachcoat to a gloss and shiny finish.

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SECTION 09900 PAINTING

PART 1 GEN ERA L

1.01 SCOPE


all painting and varnishing work as specified herein.

See drawings for location, quantity and extent or surfaces to receive paintand varnish.

1.02 TEST PANELS

Prepare sample panels of selected color or shade on 2 feet by 2 feet plywoodpanels for approval by the Architect.

PART 2 PRO DUC T

MATERIALS

Refer to the Summary of Materials and Finishes.

PART 3 EXECUT ION

3.01 WO RKM ANSH IP IN GENERAL

a. Mix paint with proper consistency. App ly paints evenly and brushefficiently to minimize brush marks.

b. Stir paint thoroug hly to keep pigm ent in even suspen sion whe n paintis being applied.

c. Except as otherw ise directed by the Architect, apply all paints in threecoats (priming, body and finish). Allow each coat to dry thoroughlybefore the succeeding coat is applied. In general, unless other sideinstructed by the Architect provide not less than 48 hours as the timebetween the application of succeeding coats. Let the Architect or hisrepresentatives inspect and approve each coat before the succeedingcoat is applied.

d. If surfaces are not fully covered or canno t be satisfactory finished inthe number of coats specified, apply subsequent coats to attain the

desired evenness of paint.

e. Touch up knots, pitch streaks, sap py spo ts, etc. wh ere finish calls forinterior paint or enamel. For exteriors, use and approve sealer.

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f. Sand smo oth wo odw ork to be f inished with enam el or varnish. Usefine sandpa per between coats of enam el of varnished applied towo od or metal to produce an even smoo th surface.

g. Do not paint exterior wh ile surface is dam p or durin g rainy or dam pweather.

h. Do nece ssary putting of nail holes, cracks, etc. after the prime coathas been applied. Bring putty flush with adjoining surface in a neat,workmanlike manner.

I. Tint unde rcoats of paint or ena me l to sam e or appro ximate shade offinal coat.

j . protect to remo ve hardw ares, hardw are acces sories, plates, lightingfixtures and other similar items during the painting operation andreinstall them after completion of work.

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D I V I S I O N 1 0 S P E C I A L T I E S

SECTION 10521 FIRE EXTINGU ISHER

PART 1 GEN ERA L

SCOPE

Furnish materials and equipment and perform labor required to completeall:

fire extinguishers/mounting

See drawings for location of work.

PART 2 PROD UCTS

Fire Extinguisher, multipurpose dry chemical type, C rated.

PART 3 EXECU TION

Install items in accord man ufacturer's direction and recom men dations.Where details apparently require departures from these directions, secure

instructions before proceeding.

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D I V I S IO N 1 0 S P E C I A L T I E S

SECTION 10820 TOILET ACCESS ORIES

PART 1 GEN ERAL

SCOPE

Furnish materials and equipment and perform labor required to completeall:

toilet accessories

See drawings and details for sizes and locations of work required.

PART 2 PROD UCTS

2.01 MATERIALS

Refer to the Summary of Materials & Finishes and drawings.

PART 3 EXECU TION

Furnish and install all toilet ac cess ories true to line, plane and level, inaccordance to manufacturer's specifications.

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DIVISION 11 - MECHA NICAL

SECTION 11400 PLUMB ING WO RKS

I . GENERAL

1. Gene ral Description - The work to be done under this Division of thespecifications of the fabrication, complete in all details, of the Plumbing Works, atthe subject premises and all the materials incidental to the proper completion of theinstallation, except those portions of the work which are expressly stated to be doneby others. All works shall be in accord ance with the govern ing Codes andRegulations and with the specifications, except where same shall conflict with suchCodes, etc. which, later shall then govern. The requirements in regards to materialsand work m ans hip spe cify the required standards for the furnishings of all labor,materials and appliances necessary for the completion of the work specified hereinand indicated in the drawings.

2. Drawings Specification

2.1 The contract drawing and specifications are com plem entary to eachother and any labor an materials called for by either, whether or not calledfor by both, if necessary for the successful operation of nay of the particulartype of equipment furnished and installed without additional cost to the

Owner.

2.2 All dime nsions location of fixtures, equip me nt floor and roof drains,risers and pipe cha se shall be verified on the architectural d rawings andmanufacturer's catalogue.

3. Intent - It is not intende d that the dra win gs shall sho w every pipe, fitting,valve and appliance. All such items show whether specifically mentioned or not, orindicated on the drawings, shall be furnished and installed if necessary to completethe system in accordance with the best practice of the plumbing trade and to the

satisfaction of the Architect, the Engineer and the Owner.

4. Site Investiga tion - Th e Con tracto r is requ ired to visit the site and toascertain himself as to the local conditions and facilities that may affect his work. Hewill be deemed to have done this before preparing his proposal and any subsequentclaims on the ground of inadequate or inaccurate informa tion will not beentertained.

5. Shop D ra w in g -T h e Contractor shall submit to the ARCH ITECT and theEngineer, for approval, four (4) copies of all s hop drawings of details and connectionnot show n on the drawings or deviation thereo f but required for the work. TheContractor shall certify that the drawings have been checked for dimensions,ma terials, erection details and conform to the intent of the drawings andspecifications.

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6. Record Draw ings

6.1 Th e Contra ctor shall during the progress of wo rk, keep a record of the

actual installation from that shown on the contract drawings.

6.2 Upo n com pletion of the wo rk, the Con tractor shall subm it four (4)copie s of as-built drawings indicating the work as actually and finallyinstalled.

7. Gu aran tee - The Contractor shall guara ntee that the plum bing system is freeform all defective workmanship and materials and will remain so for a period of one(1) year from the date of acceptance of the work. Any defects, appearing within theaforesaid period shall be remedied by the Contractor at his own expense.

8. Perm its - The Contracto r shall be respon sible for secu ring all the requiredconstruction and operation permits and pay all necessary fees thereof. Copies ofinspections shall be submitted to the Owner.

9. Cod es and Stand ards - Th e wo rk unde r this contract is to be installed withreference to the latest requirements of the following:

9.1 PHILIPPINE NATIONAL BUILDING COD E

9.2 REGULATION OF LOCAL WATER WOR KS & SEW ERAG E AUTHO RITY

9.3 UNIFORM PLUMBING CODE (UPC)

9.4 AM ERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

9.5 AM ERIC AN NATIONAL STAND ARD INSTITUT E (ANSI)

9 .6 AM ERICAN WATER WO RKS ASSOCIATION (AWWA)

9.7 NATIONAL FIRE PROT ECTION ASSO CIATION (NFPA)

9.8 UND ERW RITER 'S LABORAT ORIES (UL)

9.9 FACTORY MU TUAL (FM)

9.10 NATIONAL ELECTRICAL MAN UFACTU RERS ASSOCIATION (NEMA)

II. MATERIALS

1. Qu ality Assu ranc e - All mate rials shall be used shall be new and shallcon form with the reference code s and stand ards. Use or materials shallfurther be governed by other requirements, imposed on other sect ions ofthese specifications. Materials shall be subject to test necessary their fitnessif so requires.

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2. Altern ate Ma terials - Use of any material, not specified in thesespecifications may be allowed provided such alternate has been approved bythe Architect and Engineer and provided further that a test, if required , shall

be done by an approved agency in accordance with the general ly acceptedstandards.

3. Identification of Ma terials - Each length of pipe, fittings, traps, fixtures anddevise used in the plumb ing systems shall be case, stam ped or indeliblymarked on i t ' s manufacture t rademark or name, the wight , type and classesor product when so required by the standard mentioned above.

4. Polyvinyl Chlorid e Piping

4.1 Typ e - Polyvinyl chloride (PVC), AS TM D - 2729, sche dule 40

4.2 Mo ldex blue or approv ed equa l for all wa ter line piping.

4.3 San imo ld orange uPVC with exclusive O-rin g or appro ved equa l for allwater lines and vents.

4.4 Fittings - Polyvinyl chloride

4 .5 P ipe Se a l a n t -P VC ch lo r ide

4.6 75 mmO S anim old Oran ge uPV C pipes or ap prov ed equal for alldownspouts .

5. Con crete Piping

5.1 Typ e - Concrete Pipes, AST M C - 78

5.2 M inim um wall thickn ess - Plain concre te

PSHS General Specifications and Technical Specifications

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