Addendum No. 4 Systems Upgrade Fleming Campus … · Specification 09 67 23 – Self Leveling...

Addendum No. 4

Project: Systems Upgrade Fleming Campus Laboratory Building Control No: 01298 Issued: To all listed plan holders Date: July 13, 2018 This addendum forms a part of the Agreement described above. The original Contract Documents and any prior addenda remain in full force and effect except as modified by the following, which shall take precedence over any contrary provisions in prior documents. Bid Due Date is still as scheduled on Tuesday, July 17, 2018 at 2:00 PM EST.

1. Specification 09 67 23 – Self Leveling Resinous Flooring DELETE Spec 09 67 23, and REPLACE with revised Spec 09 67 23.

2. Specification 11 57 17 – Laboratory Equipment Washers DELETE Spec 11 57 17, and REPLACE with revised Spec 11 57 17.

3. Specification 23 31 13 – Metal Ductwork DELETE Spec 23 31 13, and REPLACE with revised Spec 23 31 13.

4. Specification 26 05 73– Overcurrent Protective Devices DELETE Spec 26 05 73, and REPLACE with revised Spec 26 05 73.

END

Each Bidder/Proposer shall acknowledge receipt of this addendum by affixing his signature below, by noting this addendum on his Bid/Proposal Form, and by attaching this addendum to his Bid/Proposal. Failure to acknowledge this addendum could be cause for bid/proposal rejection.

ACKNOWLEDGMENT

The undersigned acknowledges receipt of this addendum and the Bid submitted is in accordance with information, instructions and stipulations set forth herein.

BIDDER / PROPOSER _________________________________ AUTHORIZED SIGNATURE_____________________________ DATE _____________________________________________

SELF LEVELING RESINOUS FLOORING 09 67 23:1

SECTION 09 67 23 – SELF LEVELING RESINOUS FLOORING

PART 1 - GENERAL

1.1 SECTION INCLUDES

A. Fluid-applied flooring for Concrete.

B. Accessories.

1.2 RELATED SECTIONS

A. Section 03 35 00 - Concrete Finishes

1.3 REFERENCES

A. ASTM D4258 - Standard Practice for Cleaning Concrete

B. ASTM D4259 - Standard Practice for Abrading Concrete

C. ASTM D4260 - Standard Practice for Etching Concrete

D. ASTM D4263 - Plastic Sheet Method for Checking Moisture in Concrete

E. ASTM F1869 - Moisture Test by use of Calcium Chloride

F. ICRI # 03732 - Guide to selecting appropriate method of concrete surface preparation prior to the

installation of a coating

G. SSPC-SP 1 - Solvent Cleaning

H. SSPC-SP 2 - Hand Tool Cleaning

I. SSPC-SP 3 - Power Tool Cleaning

J. SSPC-SP 13 / NACE No. 6 Surface Preparation for Concrete

1.4 SUBMITTALS

A. Submit under provisions of Section 01 33 00.

B. Product Data: For each type of product indicated.

1. Product characteristics.

2. Surface preparation instructions and recommendations.

3. Primer requirements and finish specification.

4. Storage and handling requirements and recommendations.

5. Application methods.

6. Cleanup information.


C. Product Samples: For each type of product indicated of each product color, texture and pattern available or

as specified.

D. Coating Maintenance Manual: upon conclusion of the project, the Contractor or paint manufacture/supplier

shall furnish a coating maintenance manual, such as Sherwin-Williams “Custodian Project Color and

Product Information” report or equal. Manual shall include an Area Summary with finish schedule, Area

Detail designating where each product/color/finish was used, product data pages, Material Safety Data

Sheets, care and cleaning instructions, touch-up procedures, and color samples of each color and finish

used.

1.5 REGULATORY REQUIREMENTS

A. Conform to applicable local building code requirements.

1.6 QUALITY ASSURANCE

A. Provide a mock-up area for approval by Owner and Architect. Do not proceed with remaining work until

the Architect approves the mock-up area.

B. Applicator:

1. Pre-qualification requirements: Only approved applicators, licensed by the manufacturer shall be

considered for qualification.

2. Each approved applicator shall have been qualified by the manufacturer as knowledgeable in all

phases of surface preparation.

3. Each approved applicator must have three (3) years experience of installing resinous flooring

systems and submit a list of five projects/references as a prequalification requirement. At least one

of the five projects/ references must be of equal size, quantity, and magnitude to this project as a

prequalification requirement. Owner has the option to personally inspect the projects/references to

accept or reject any of the Contractors prior to bid time as a prequalification requirement.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Deliver, store, protect and handle products to site under provisions of Section 01 60 00.

B. Deliver products in manufacturer's original containers, dry, undamaged, seals and labels intact.

C. Store products in weather protected environment, clear of ground and moisture. Store materials in an area

that is within the acceptable temperature range, per manufacturer’s instructions. Protect from freezing.

D. Store and dispose of solvent-based materials, and materials used with solvent-based materials, in

accordance with requirements of local authorities having jurisdiction.

1.8 ENVIRONMENTAL REQUIREMENTS

A. Conform to manufacturer’s standard specifications.

B. Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by

manufacturer for optimum results. Do not apply coatings under environmental conditions outside

manufacturer's absolute limits.


1.9 COORDINATION

A. Coordinate work under provisions of Section 01 31 00.

B. Contractor shall field verify dimensions required for installation prior to ordering of materials.

1.10 SUBSTITUTIONS

A. Requests for substitutions shall be under provisions of Section 01 60 00.

1.11 WARRANTY

A. Provide manufacturer’s standard warranty under provisions of Section 01 70 00.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Sherwin-Williams or approved substitution.

B. Model numbers and performance criteria for Self Leveling Resinous Flooring manufactured by Sherwin-

Williams are listed to establish a standard of quality for design, function, materials, workmanship, and

appearance.

C. Products shall be the product(s) of a single manufacturer.

2.2 GENERAL

A. ArmorSeal ArmorQuartz 650 SL/RC System is a 100% Solids Epoxy System. It is a self-leveling, multi-

component decorative broadcast color quartz epoxy system. The heavy-duty floor system provides a high

gloss, seamless, hygienic surface that is extremely hardwearing and decorative.

2.3 MATERIALS

A. Paints and Coatings - General: Unless otherwise indicated, provide factory-mixed coatings. When

required, mix coatings to correct consistency in accordance with manufacturer's instructions before

application. Do not reduce, thin, or dilute coatings or add materials to coatings unless such procedure is

specifically described in manufacturer's product instructions.

B. Primers: Where the manufacturer offers options on primers for a particular substrate, use primer

categorized as "best" by the manufacturer.

C. System application materials are as follows:

1. 1st Coat: ArmorSeal 33 Epoxy Primer/Sealer (10.0 mils wft, broadcast to excess with color quartz).

2. 2nd Coat: ArmorSeal 33 Epoxy Primer/Sealer (24.0 mils wft, broadcast to excess with color

quartz).

3. 3rd Coat: ArmorSeal 650 SL/RC Clear Self-Leveling Epoxy (15.0 mils wft).

4. 4th Coat: ArmorSeal 650 SL/RC Clear Self-Leveling Epoxy (8.0 mils wft).


2.4 PERFORMANCE REQUIREMENTS

A. ArmorSeal 33 Epoxy Primer/Sealer

1. Performance Characteristics:

a. Abrasion resistant.

b. Fast drying.

c. Chemical resistant.

d. Impact resistant.

e. Low odor.

f. 100% solids.

g. Dry heat resistance: 180°F

2. Measurable Criteria:

Test Name Test Method Results Adhesion Compressive Strength

ASTM D4541 ASTM D695

350 psi ~9,000 psi

Flexural Strength ASTM D790 ~6,000 psi

Hardness - Shore D

ASTM D2240

65-75

Tensile Strength

ASTM D638

~3,000 psi


B. ArmorSeal 650 SL/RC Clear Self-Leveling Epoxy

1. Performance Characteristics:

a. Excellent adhesion properties.

b. Chemical resistant.

c. Self - leveling properties.

d. Provides a seamless-high build durable coating.

e. Solvent resistant.

f. Dry heat resistance: 200°F

2. Measurable Criteria:

Test Name Test Method Results Abrasion Resistance

ASTM D4060, CS17 wheel, 1000 cycles, 1 Kg load

100 mg loss

Flexural Strength ASTM D790 ~12,400 psi

Hardness - Shore D

ASTM D2240

75

Impact Resistance

Mil-D-3134J

Direct: >160 in lb; Indirect: > 80 in lb

Nuclear Decontamination

ASTM D4256 / ANSI N 5.12

99.7% Water Wash; 98% Overall

Radiation Tolerance

ASTM D4082 / ANSI 5.12

Pass at 30 mils (750 microns)

Surface Burning**

ASTM E84/NFPA 255

Flame Spread Index 20; Smoke Development Index 35

Tensile Strength

ASTM D638

~6,000 psi

2.5 ACCESSORIES

A. Coating Application Accessories: Provide all primers, sealers, cleaning agents, cleaning cloths, sanding

materials, and clean-up materials required, per manufacturer’s specifications.

B. Sub-Floor Filler: Ardex Engineered Cements

1. Where application thickness is 1/4 inch or less, provide Ardex Feather Finish per manufacturer’s

instructions.

2. Where application thickness is greater than ¼ inch, provide Ardex K-15 Self Leveler in

conjunction with Ardex P-82 Primer per manufacturer’s instructions.

C. Wall Base: Shall be 1/8” gauge solid thermoset vulcanized rubber by Roppe, in standard toe (cove base),

4” in height. Color: Dark Gray, # 150. Corners shall be job formed per manufacturer’s instructions.


2.6 FINISHES

A. Provide full range of available colors for the following:

1. Epoxy Coating.

2. Decorative quartz broadcast.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine the concrete floor slab before beginning the work.

B. Do not begin installation until substrates have been properly prepared.

3.2 PREPARATION

A. Clean surfaces and substrates thoroughly prior to installation.

B. Prepare surfaces and substrates using the methods recommended in writing by the manufacturer.

C. Newly poured concrete: For surface preparation, refer to SSPC-SP13/NACE 6/ICRI # 03732. Surfaces

must be clean, dry, sound and offer sufficient profile to achieve adequate adhesion. Minimum substrate

cure is 28 days at 75°F. Remove all form release agents, curing compounds, salts, efflorescence, laitance,

and other foreign matter by sandblasting, shotblasting, mechanical scarification, or suitable chemical

means. Refer to ASTM D4260. Rinse thoroughly to achieve a final pH between 8.0 and 10.0. Allow to

dry thoroughly prior to coating.

D. Existing concrete: Surface preparation is done in much the same manner as new concrete, however, if the

concrete is contaminated with oils, grease, chemicals, etc., they must be removed by cleaning with a strong

detergent. Refer to ASTM D4258. Form release agents, hardeners, etc. must be removed by sandblasting,

shotblasting, mechanical scarification, or suitable chemical means. If surface deterioration presents an

unacceptably rough surface, ArmorSeal 5020 Floor Resurfacer shall be used to patch and resurface

damaged concrete.

E. Previously Painted Surfaces: If in sound condition, clean the surface of all foreign material. Smooth, hard

or glossy coatings and surfaces shall be dulled by abrading the surface. Apply a test area, allowing paint to

dry one week before testing adhesion. If adhesion is poor, or if this product attacks the previous finish,

removal of the previous coating may be necessary. If paint is peeling or badly weathered, clean surface to

sound substrate and treat as a new surface as above.

F. Fill all cracks, voids, holes and joints with appropriate filler or ArmorSeal Crack Filler, ArmorSeal Joint

Sealant, or ArmorSeal Expresspatch.

G. Installer shall follow the ASTM methods listed below:

1. ASTM F1869 Moisture Test by use of Calcium Chloride

2. ASTM D4258 Standard Practice for Cleaning Concrete.

3. ASTM D4259 Standard Practice for Abrading Concrete.

4. ASTM D4260 Standard Practice for Etching Concrete.

5. ASTM D4263 Plastic Sheet Method for Checking Moisture in Concrete.

6. SSPC-SP 13/Nace 6 Surface Preparation of Concrete.

7. ICRI # 03732 Surface Preparation of Concrete.


3.3 INSTALLATION

A. Install in accordance with manufacturer's written instructions.

B. Do not apply to wet or damp surfaces.

1. Either wait at least 28 days before applying to new concrete or masonry or follow manufacturer’s

procedures to apply appropriate coatings prior to 28 days.

2. Test new concrete for moisture content.

C. Uniformly apply coatings without runs, or sags, without brush marks, and with consistent sheen.

D. Apply coatings at spreading rate required to achieve the manufacturer’s recommended dry film thickness.

3.4 FIELD QUALITY CONTROL

A. The coated surface must be inspected and approved by the Architect or Engineer just prior to the

application of each coat.

3.5 ADJUSTING AND DEMONSTRATION

A. Adjust work under the provisions of Section 01 70 00.

B. Train Owner's maintenance personnel to maintain the flooring finish.

3.6 CLEANING AND PROTECTION

A. Protect installed products under provisions of Section 01 50 00.

B. Touch-up, repair or replace damaged products before Substantial Completion.

END OF SECTION 09 67 23 – SELF LEVELING RESINOUS FLOORING

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LABORATORY EQUIPMENT WASHERS 11 57 17:1

SECTION 11 57 17-LABORATORY EQUIPMENT WASHERS

PART 1 - GENERAL

1.1 SECTION INCLUDES

A. Laboratory glassware washers.

1.2 RELATED SECTIONS

A. Refer to Mechanical, Plumbing and Electrical.

1.3 REFERENCES

A. ETL Listed.

B. UL 61010-1 - Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory

Use.

1.4 SUBMITTALS

A. Submit under provisions of Section 01 33 00.

B. Product Data: For each type of product indicated.

C. Product Samples: For each type of product indicated of each product color, texture and pattern available or

as specified.

1.5 REGULATORY REQUIREMENTS

A. Conform to applicable local building code requirements.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver, store, protect and handle products to site under provisions of Section 01 60 00.

B. Deliver products in manufacturer's original containers, dry, undamaged, seals and labels intact.

C. Store products in weather protected environment, clear of ground and moisture.

1.7 ENVIRONMENTAL REQUIREMENTS

A. Conform to manufacturer’s standard specifications.

1.8 COORDINATION

A. Coordinate work under provisions of Section 01 31 00.

B. Contractor shall field verify dimensions required for installation prior to ordering of materials.

1.9 WARRANTY

A. Provide manufacturer’s standard 2 year warranty under provisions of Section 01 70 00.


PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Labconco Corporation.

B. Model numbers and performance criteria for Laboratory Equipment Washers manufactured by Labconco

Corporation are listed to establish a standard of quality for design, function, materials, workmanship, and

appearance.

C. Laboratory Equipment Washers shall be the product(s) of a single manufacturer.

D. Specific materials and product manufacturer(s) are specified to maintain standard building finishes across

multiple facilities.

2.2 GENERAL

A. Provide Laboratory Equipment Washers as specified by function and model.

B. SteamScrubber Undercounter Model:

1. 120 volt, 60Hz, 16 amp, model: 4400320

2.3 MATERIALS

A. Tank and interior door shall be constructed of Type 304 stainless steel with brushed finish. Unit has four

adjustable leveling feet.

B. Racks shall operate on 304 grade stainless steel slides.

C. Fiberglass blanket by manufacturer shall surround the tank.

D. Include manufacturer installed aluminum-backed acoustic material is located at strategic locations.

E. Control panel shall be injection molded with microprocessor that stores factory preset programs. Wash

programs include:

1. Program parameters: WASH 2 TEMPERATURE, WASH 2 TIME, TOTAL NUMBER OF

RINSES, NUMBER OF PURIFIED WATER RINSES (UP TO 6), FINAL RINSE

TEMPERATURE, ENABLE OR DISABLE THE STEAM FUNCTION, DRY TEMPERATURE

AND DRY TIME is capable of alteration by the user. An LCD displays the program selected and

details of the program.

2. 120V Models:

a. RINSE ONLY: 1 tap water rinse, no drying.

b. PLASTIC: Two washes, two rinses (tap or pure water), water temperature set point 122F

(50C), 15 minute dry time.

c. GLASS: Two washes, 3 rinses (tap or pure water), water temperature set point 140F (60C),

30 minute dry time

d. GLASS PLUS: Two washes, 10 minute steam cycle, 4 rinses (tap or pure water), water

temperature set point 140F (60C), 30 minute dry time

e. SCIENTIFIC: Two washes, 4 rinses (tap or pure water), water temperature set point 158F

(70C), 40 minute dry time.

f. SCIENTIFIC PLUS: Two washes, 10 minute steam cycle, 4 rinses (tap or pure water), water


temperature set point 158F (70C), 40 minute dry time.

g. DRY ONLY: Dry time set for 60 minutes.

F. Steam generator produces steam before the second wash cycle of any program except RINSE ONLY and

PLASTIC. Selection or cancellation of steam is from the control panel.

G. Purified water pump brings pressurized or non-pressurized purified water from an external source into the

tank for up to 6 pure water rinses. Selection or cancellation of purified water is from the control panel.

H. Overflow detector, if water is detected in the base of the washer, the water fill valves will close and the

washer will cancel the cycle and drain the washer

I. Dual pump system: Separate pumps for drain and fill water to eliminate cross-contamination. System fills

with clean water during drain to flush out washer before clean water is added.

J. Detergent dispenser holds powder or liquid detergent. An indentation on the door's interior accommodates

additional detergent.

K. Circulation pump is capable of re-circulating up to 96 gallons (363 liters)on 115V, and 208/240V 50Hz

models and 112 gallons (424 liters) on 208/240V, 60Hz models of water per minute (at 60 Hz) throughout

the tank during the wash cycle.

L. Purified water inlet valve is equipped with a plastic serrated hose connection to accommodate 3/8" ID

flexible plastic or rubber hose.

M. Particle filter is constructed of one-piece stainless steel fine mesh and removable for cleaning.

N. Models wired for 115 volts have a 1200 watt steam heater. With a minimum inlet temperature of 120

degrees F (49 degrees C), the sump heater elevates water temperature approximately 60 degrees F (33

degrees C). Maximum water temperature is180 degrees F (82 degrees C) for wash and rinse water.

O. SteamScrubber models also feature three wash arms, side rails, open top rack and bottom rack constructed

of Type 304 stainless steel. Top rack may be positioned in either of two different height locations.

P. Sound level shall be 62 dbA or less.

Q. Washers are manufactured in the U.S.A.

2.4 FABRICATION

A. Nominal Exterior Dimensions of Undercounter models: 24.1" W x 27.4" D x 34.1" H minimum to 36.1" H

maximum (61.1 x 69.5 x 86.6 cm minimum to 91.7 cm maximum). Undercounter models shall fit under

ADA countertop.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine the Laboratory Equipment Washer and the area of installation.

B. Do not begin installation until substrates have been properly prepared.


3.2 PREPARATION

A. Clean surfaces and substrates thoroughly prior to installation.

B. Prepare surfaces and substrates using the methods recommended in writing by the manufacturer.

C. Verify equipment rough-in before proceeding with work.

D. Coordinate with other trades for the proper and correct installation of plumbing and electrical rough-in and

for rough opening dimensions required for the installation of the washer

3.3 INSTALLATION

A. Install in accordance with manufacturer's written instructions.

1. Electrical requirements: 1 phase, 115V, 60Hz, 16 amps or 1 phase, 230V, 50/60Hz, 12 amps.

2. Plumbing Connections:

a. Hot tap water connection for wash cycle: Minimum inlet water temperature of 120F (49C).

3/8" ID flexible plastic or rubber hose for connection to the water inlet valve. Input pressure

20-120psi.

b. Final pure water rinse connection: Supply piping of a minimum 3/8" ID to permit at least

1.25 gallons (4.7 liters) per minute flow. Minimum input pressure 0 psi.

c. Drain connection: 3/4" drain connection is provided


A. Install according to standards required by authority having jurisdiction.

B. Install equipment plumb, square and straight with no distortion and securely anchor as required.

C. Sequence installation to ensure utility connections are achieved in an orderly and expeditious manner.

3.5 ADJUSTING AND DEMONSTRATION

A. Adjust work under the provisions of Section 01 70 00.

B. Train Owner's maintenance personnel to adjust, operate, and maintain the appliances.

C. Furnish to Owner all required instruction manuals for operation instructions and maintenance of equipment

after testing all equipment before final inspection by Architect.

3.6 CLEANING AND PROTECTION

A. Protect installed products under provisions of Section 01 50 00.

B. Touch-up, repair or replace damaged products before Substantial Completion.

END OF SECTION 11 57 17-LABORATORY EQUIPMENT WASHERS

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METAL DUCTWORK 233113: 1

SECTION 23 31 13 –METAL DUCTWORK

GENERAL

1.1 DUCTWORK

A. Low pressure ductwork refers to systems operating at 2.0" w.g. total static pressure with velocities up

to 2000 FPM

B. Medium pressure ductwork refers to systems with velocities greater than 2000 fpm operating at a static

pressure of 6" or less, but greater than 2" wg. These are ducts upstream of terminal units/VAV boxes.

C. Provide and/or construct all materials, ductwork, joints, transitions, dampers, access doors, etc., as set

forth in these specifications necessary to install the low pressure sheet metal ductwork required by the

Mechanical Drawings.

D. Seal all duct openings with plastic during construction. Protect the return/negative pressure side of

ductwork system throughout the entire construction period.

1.2 PERFORMANCE REQUIREMENTS

A. Delegated Duct Design: Duct construction, including sheet metal thicknesses, seam and joint construc-

tion, reinforcements, and hangers and supports, shall comply with the latest edition of SMACNA

"HVAC Duct Construction Standards," (Metal and Flexible) and performance requirements and design

criteria indicated in "Duct Schedule" Article.

B. Structural Performance: Duct hangers and supports shall withstand the effects of gravity loads and

stresses within limits and under conditions described in SMACNA "HVAC Duct Construction Stand-

ards" (Metal and Flexible).

PART 2 PRODUCTS

2.1 RECTANGULAR DUCTS AND FITTINGS

A. General Fabrication Requirements: Comply with SMACNA "HVAC Duct Construction Standards"

(Metal and Flexible) based on indicated static-pressure class unless otherwise indicated.

B. Transverse Joints: Select joint types and fabricate according to SMACNA's "HVAC Duct Construction

Standards - Metal and Flexible," "Rectangular Duct/Transverse Joints," for static-pressure class, appli-

cable sealing requirements, materials involved, duct-support intervals, and other provisions in SMAC-

NA's "HVAC Duct Construction Standards - Metal and Flexible."

C. Longitudinal Seams: Select seam types and fabricate according to SMACNA's "HVAC Duct Construc-

tion Standards - Metal and Flexible," "Rectangular Duct/Longitudinal Seams," for static-pressure class,

applicable sealing requirements, materials involved, duct-support intervals, and other provisions in

SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."

D. Elbows, Transitions, Offsets, Branch Connections, and Other Duct Construction: Select types and fab-

ricate according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Chapter 4,

"Fittings and Other Construction," for static-pressure class, applicable sealing requirements, materials

involved, duct-support intervals, and other provisions in SMACNA's "HVAC Duct Construction

Standards - Metal and Flexible."


2.2 ROUND DUCTS AND FITTINGS

A. General Fabrication Requirements: Comply with SMACNA's "HVAC Duct Construction Standards -

Metal and Flexible," Chapter 3, "Round, Oval, and Flexible Duct," based on indicated static-pressure

class unless otherwise indicated.

1. Manufacturer: Eastern Sheet Metal, SEMCO and United Sheet Metal.

B. Transverse Joints: Select joint types and fabricate according to SMACNA's "HVAC Duct Construction

Standards - Metal and Flexible," Figure 3-1, "Round Duct Transverse Joints," for static-pressure class,

applicable sealing requirements, materials involved, duct-support intervals, and other provisions in

SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."

1. Transverse Joints in Ducts Larger Than 60 Inches in Diameter: Flanged.

C. Longitudinal Seams: Select seam types and fabricate according to SMACNA's "HVAC Duct Construc-

tion Standards - Metal and Flexible," Figure 3-2, "Round Duct Longitudinal Seams," for static-pressure

class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions

in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."

D. Elbows shall be smooth radius with a centerline radius of 1.5 times the duct diameter.

E. Tees and Laterals: Select types and fabricate according to SMACNA's "HVAC Duct Construction

Standards - Metal and Flexible," "90 Degree Tees and Laterals," and "Conical Tees," for static-

pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other

provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."

2.3 DUCT ACCESS DOORS

A. Provide insulated, factory fabricated access doors with dual latches and gaskets along perimeter. Door

shall match leakage and pressure class ratings of duct where door is located.

2.4 SHEET METAL MATERIALS

A. General Material Requirements: Comply with SMACNA's "HVAC Duct Construction Standards -

Metal and Flexible" for acceptable materials, material thicknesses, and duct construction methods un-

less otherwise indicated. Sheet metal materials shall be free of pitting, seam marks, roller marks, stains,

discolorations, and other imperfections.

B. Tie Rods: Galvanized steel, 1/4-inch minimum diameter for lengths 36 inches or less; 3/8-inch mini-

mum diameter for lengths longer than 36 inches.

C. Stainless-Steel Sheets: Comply with ASTM A 480/A 480M, Type 316, as indicated in the "Duct

Schedule" Article; cold rolled, annealed, sheet. Exposed surface finish shall be No. 2B, No. 2D, No. 3,

or No. 4 as indicated in the "Duct Schedule" Article.

2.5 JOINT SEALER

A. Manufacturer by Hardcast, Iron grip, Polymer #11 or United McGill Corp. Provide two Stage Sealant

Process.

1. Stage 1: Apply fiber DT tape.

2. Stage 2: Brush on RTA-50 sealant over fiber tape.


2.6 GASKETS AND SEALS

A. Flange Gaskets: Butyl rubber, neoprene, or EPDM polymer with polyisobutylene plasticizer.

B. Round Duct Joint O-Ring Seals:

1. Seal shall provide maximum leakage class of 3 cfm/100 sq. ft. at 1-inch wg and shall be rated

for10-inch wg static-pressure class, positive or negative.

2. EPDM O-ring to seal in concave bead in coupling or fitting spigot.

3. Double-lipped, EPDM O-ring seal, mechanically fastened to factory-fabricated couplings and

fitting spigots.

2.7 HANGERS AND SUPPORTS

A. Hanger Rods for Noncorrosive Environments: Cadmium-plated steel rods and nuts.

B. Hanger Rods for Corrosive Environments: Electrogalvanized, all-thread rods or galvanized rods with

threads painted with zinc-chromate primer after installation.

C. Strap and Rod Sizes: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and

Flexible," Table 5-1 (Table 5-1M), "Rectangular Duct Hangers Minimum Size," and Table 5-2, "Min-

imum Hanger Sizes for Round Duct."

D. Steel Cables for Galvanized-Steel Ducts: Galvanized steel complying with ASTM A 603.

E. Steel Cable End Connections: Cadmium-plated steel assemblies with brackets, swivel, and bolts de-

signed for duct hanger service; with an automatic-locking and clamping device.

F. Duct Attachments: Sheet metal screws, blind rivets, or self-tapping metal screws; compatible with duct

materials.

G. Trapeze and Riser Supports:

1. Supports for Galvanized-Steel Ducts: Galvanized-steel shapes and plates.

2. Supports for Aluminum Ducts: Aluminum or galvanized steel coated with zinc chromate.

PART 3 EXECUTION

3.1 DUCT INSTALLATION

A. Seal all duct and equipment openings with plastic.

B. Drawing plans, schematics, and diagrams indicate general location and arrangement of duct system.

Indicated duct locations, configurations, and arrangements were used to size ducts and calculate fric-

tion loss for air-handling equipment sizing and for other design considerations.

C. Install ducts according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" un-

less otherwise indicated.

D. Seal all low pressure transverse and longitudinal joints with approved sealer in accordance with manu-

facturer's recommendation instructions.

E. Install round ducts in maximum practical lengths.

F. Install ducts with fewest possible joints.


G. Install factory- or shop-fabricated fittings for changes in direction, size, and shape and for branch con-

nections.

H. Unless otherwise indicated, install ducts vertically and horizontally, and parallel and perpendicular to

building lines.

I. Install ducts close to walls, overhead construction, columns, and other structural and permanent enclo-

sure elements of building.

J. Install ducts with a clearance of 1 inch, plus allowance for insulation thickness.

K. Route ducts to avoid passing through transformer vaults and electrical equipment rooms and enclo-

sures.

L. Where ducts pass through non-fire-rated interior partitions and exterior walls and are exposed to view,

cover the opening between the partition and duct or duct insulation with sheet metal flanges of same

metal thickness as the duct. Overlap openings on four sides by at least 1-1/2 inches.

M. Where ducts pass through fire-rated interior partitions and exterior walls, install fire dampers. Comply

with requirements in Section 233713 "Sheet Metal Specialties" for fire and smoke dampers.

N. Protect duct interiors from moisture, construction debris and dust, and other foreign materials.

3.2 INSTALLATION OF EXPOSED DUCTWORK

A. Protect ducts exposed in finished spaces from being dented, scratched, or damaged.

B. Trim duct sealants flush with metal. Create a smooth and uniform exposed bead. Do not use two-part

tape sealing system.

C. Grind welds to provide smooth surface free of burrs, sharp edges, and weld splatter. When welding

stainless steel with a No. 3 or 4 finish, grind the welds flush, polish the exposed welds, and treat the

welds to remove discoloration caused by welding.

D. Maintain consistency, symmetry, and uniformity in the arrangement and fabrication of fittings, hangers

and supports, duct accessories, and air outlets.

E. Repair or replace damaged sections and finished work that does not comply with these requirements.

3.3 DUCT SEALING

A. Seal ducts for duct static-pressure, seal classes, and leakage classes specified in "Duct Schedule" Arti-

cle according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."

3.4 HANGER AND SUPPORT INSTALLATION

A. Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Chapter 5,

"Hangers and Supports."

B. Building Attachments: Concrete inserts, powder-actuated fasteners, or structural-steel fasteners appro-

priate for construction materials to which hangers are being attached.

1. Where practical, install concrete inserts before placing concrete.

2. Install powder-actuated concrete fasteners after concrete is placed and completely cured.


3. Use powder-actuated concrete fasteners for standard-weight aggregate concretes or for slabs

more than 4 inches thick.

4. Do not use powder-actuated concrete fasteners for lightweight-aggregate concretes or for slabs

less than 4 inches thick.

5. Do not use powder-actuated concrete fasteners for seismic restraints.

C. Hanger Spacing: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexi-

ble," Table 5-1 (Table 5-1M), "Rectangular Duct Hangers Minimum Size," and Table 5-2, "Minimum

Hanger Sizes for Round Duct," for maximum hanger spacing; install hangers and supports within 24

inches of each elbow and within 48 inches of each branch intersection.

D. Hangers Exposed to View: Threaded rod and angle or channel supports.

E. Support vertical ducts with steel angles or channel secured to the sides of the duct with welds, bolts,

sheet metal screws, or blind rivets; support at each floor and at a maximum intervals of 16 feet.

F. Install upper attachments to structures. Select and size upper attachments with pull-out, tension, and

shear capacities appropriate for supported loads and building materials where used.

3.5 CONNECTIONS

A. Make connections to equipment with flexible connectors complying with Section 233713 "Sheet Metal

Specialties."

B. Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" for branch, out-

let and inlet, and terminal unit connections.

3.6 START UP

A. Air Balance: Comply with requirements in Section 230593 "Testing, Adjusting, and Balancing for

HVAC."

3.7 DUCT SCHEDULE

A. Fabricate ducts with galvanized sheet steel except as otherwise indicated and as follows:

B. Supply Ducts:

1. Ducts Connected Downstream from Terminal Units:

a. Pressure Class: Positive 2-inch wg.

2. Ducts Connected to Single Zone-Volume Air-Handling:

a. Pressure Class: Positive 2.5-inch wg.

3. Ducts Connected Variable-Air-Volume Terminal Units:

a. Pressure Class: Positive 2-inch wg.

C. Return/Exhaust Ducts:

1. Ducts Connected to Air-Handling Units:

a. Pressure Class: Positive or negative 2-inch wg.

D. Exhaust Ducts:

1. Ducts Connected to Fans Exhausting (ASHRAE 62.1, Class 1 and 2) Air:


a. Pressure Class: Negative 1-inch wg.



3. Ducts Connected to Fans Exhausting Laboratory (ASHRAE 62.1, Class 3 and 4) Air:

a. Type 316L, stainless-steel sheet.

b. Concealed: No. 2B

c. PVC-coated, galvanized sheet steel with thicker coating on duct interior.

d. Pressure Class: Negative 4-inch wg (1000 PaMinimum SMACNA Seal Class: A,

Welded seams, joints, and penetrations

e. SMACNA Leakage Class: 3.

E. Outdoor-Air Ducts:



F. Intermediate Reinforcement:

1. Galvanized-Steel Ducts: Galvanized steel.

G. Elbow Configuration:

1. Rectangular Duct: Elbows shall be smooth radius with a centerline radius of 1.5 times the duct

diameter.

H. Branch Configuration:

1. Rectangular Duct: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and

Flexible," Figure 4-6, "Branch Connection."

a. Rectangular Main to Rectangular Branch: 45-degree entry.

b. Rectangular Main to Round Branch: Spin in.

2. Round: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible,"

Figure 3-5, "90 Degree Tees and Laterals," and Figure 3-6, "Conical Tees." Saddle taps are

permitted in existing duct.

I. Side Takeoff Fittings:

1. Minimum 26 gauge: galvanized steel, designed for minimum pressure drop by an expansion

from a rectangular connection to a round duct. The fitting shall include a 1" wide mounting

flange with die formed corner clips, prepunched mounting holes, and an adhesive-coated flange

gasket. The outlet collar shall be crimped and incorporate a bead.

2. Manufacturer: Crown, of Flexmaster.

END OF SECTION 23 31 13 - METAL DUCTWORK

OVERCURRENT PROTECTIVE DEVICES 26 05 73: 1

SECTION 26 05 73 - OVERCURRENT PROTECTIVE DEVICES

PART 1 – GENERAL

1.1 WORK INCLUDED

A. This section includes circuit breakers and fuses.

1.2 SUBMITTALS

A. Provide manufacturer's product data for the following:

1. Circuit breakers

2. Enclosures

3. Fuses (Provide complete list of all fuses and the equipment where they are used.)

B. Provide maintenance data for products for inclusion in the Operating and Maintenance Manual.

1. Include a load current and overload relay heater list complied by Contractor after motors have been

installed. Arrange list to demonstrate selection of heaters to suit actual motor nameplate full load

currents.

1.3 QUALITY ASSURANCE

A. Listing and Labeling: Provide overcurrent protective devices that are listed and labeled.

1. The term "listed and labeled": As defined in the National Electrical Code, Article 100.

2. Listing and Labeling Agency Qualifications: A "Nationally Recognized Testing Laboratory"

(NRTL) as defined in OSHA Regulation 1910.7.

B. Overcurrent protective devices and their installation shall comply with the requirements of the National

Electrical Code.

C. Circuit breakers shall comply with UL 489, NEMA AB 1, and NEMA AB 3.

D. Fuses shall conform to NEMA FU 1.

PART 2 – PRODUCTS

2.1 MANUFACTURERS

A. Circuit Breakers: Subject to compliance with requirements, provide products by Cutler-Hammer; General

Electric Co.; Siemens Energy & Automation, Inc.; Square D Co.; or approved equal.

B. Fuses: Subject to compliance with requirements, provide products by Bussmann Mfg. Co., Littlefuse Co,

Ferraz Shawmut, or approved equal.

2.2 MOLDED-CASE CIRCUIT BREAKERS

A. Circuit breakers shall be bolt-on only. Plug-in type circuit breakers are not permitted.


B. Circuit breakers shall be molded case, manually operated, trip-free, with inverse-time, thermal-overload

protection, and instantaneous magnetic, short-circuit protection, as required. Circuit breakers shall be

completely enclosed in a molded case, with the calibrated sensing element factory-sealed to prevent

tampering.

C. Thermal-magnetic tripping elements shall be located in each pole of the circuit breaker and shall provide

inverse-time-delay thermal overload protection and instantaneous magnetic short-circuit protection. On

frame sizes larger than 100 amperes, the instantaneous magnetic tripping element shall be adjustable and

accessible from the front of the breaker.

D. Breaker size shall be as required for the continuous current rating of the circuit. Breaker class shall be as

required.

E. Interrupting capacity of the branch circuit breakers shall be sufficient to successfully interrupt the

maximum short-circuit current imposed on the circuit at the breaker terminals. Circuit breaker minimum

interrupting capacities shall be as shown on drawings and shall conform to NEMA AB 3.

F. Multipole circuit breakers shall be of the common-trip type having a single operating handle and shall

have a two-position on/off indication. Circuit breakers shall have temperature compensation for operation

in an ambient temperature of 104 degrees F. Circuit breakers shall have root mean square (rms)

symmetrical interrupting rating sufficient to protect the circuit being supplied. Interrupting ratings may

have selective type tripping (time delay, magnetic, thermal, or ground fault).

G. Breaker body shall be of phenolic composition. Breakers shall be capable of having such accessories as

handle-extension, handle-locking, and padlocking devices attached where required.

H. Provide UL listed service entrance equipment when used for service disconnect.

I. Circuit breakers used for switching high intensity discharge lights or fluorescent lights shall be rated for

that type of service.

2.3 ENCLOSED MOLDED-CASE CIRCUIT BREAKERS

A. Enclosed circuit breakers shall be thermal-magnetic, molded-case circuit breakers in surface-mounted,

nonventilated enclosures, conforming to the appropriate articles of NEMA 250 and NEMA AB 1.

2.4 FUSES

A. A complete set of fuses for all switches shall be provided. Fuses shall have a voltage rating not less than

the circuit voltage.

B. Provide Class RK5 fuses for motor branch circuits.

C. Fuses shall be labeled showing UL class, interrupting rating, and time-delay characteristics, when

applicable.

D. Fuse holders field-mounted in a cabinet or box shall be porcelain. Field installation of fuse holders made

of such materials as ebony asbestos, Bakelite, or pressed fiber shall not be used.

E. Provide a minimum of three (3) spare fuses of each size and type fuse installed.

F. Provide a complete list of all fuses and the equipment where they are used.


2.5 EQUIPMENT ENCLOSURES

A. Enclosures for equipment shall be in accordance with NEMA 250.

B. Equipment installed inside, clean, dry locations shall be contained in NEMA Type 1, general-purpose

sheet-steel enclosures.

C. Equipment installed in wet locations shall be contained in NEMA Type 3R, rainproof, sheet-steel

enclosures, constructed for outdoor use to protect against falling rain, sleet, and ice.]

D. Ferrous-metal surfaces of electrical enclosures shall be cleaned, phosphatized, and painted with the

manufacturer’s standard finish.

PART 3 – EXECUTION

3.1 INSTALLATION

A. Install overcurrent protective devices as indicated or required, in accordance with the manufacturer's

written instructions and with recognized industry practices to ensure that protective devices comply with

requirements.

B. Coordinate with other work, including electrical wiring work, as necessary to interface installation of

overcurrent protective devices.C. Fasten circuit breakers without mechanical stresses, twisting or

misalignment being exerted by clamps, supports, or cables.

D. Install enclosed circuit breakers plumb with operating handle at five (5') feet above finished elevation.

E. Set field-adjustable circuit breakers for trip settings as indicated, subsequent to installation of devices.

F. Provide engraved plastic-laminate identification under the provisions of Section 26.05.53, "Electrical

Identification" for enclosed circuit breakers and motor controllers.


A. Prior to energization of overcurrent protective devices, test devices for continuity of circuitry and for

short-circuits. Correct malfunctioning units, and then demonstrate compliance with requirements.

B. In the presence of the Owner or Owner’s Representative, test each device and demonstrate its working as

specified.

END OF SECTION 26 05 73 – OVERCURRENT PROTECTIVE DEVICES

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