SECTION 074200 WALL PANELS - The Future Build · SECTION 074200 WALL PANELS ... temperatures on...

www.thefuturebuild.com

PO Box 54115, Abu Dhabi, United Arab Emirates

Telephone: +971 2 653 3333, Fax: +971 2 653 6002

1

SECTION 074200 WALL PANELS

This performance guide specification is part of an architectural specification and is intended to provide a

guideline for product selection and may not be appropriate for needs of specific projects.

Use of this specification is voluntary and the user needs to edit the guide specification to fit the needs of a

specific project, applicable laws and regulations, end user requirements and safety considerations.

This performance guide specification provides no guarantee as to product performance, merchantability,

or fitness for a particular purpose.

Please read the full disclaimer here.

PART 1 - G E N E R A L

1.1 SUMMARY

A. General: Read this Section in conjunction with other related Sections.

B. Design

1. Refer to Contractor's Design Responsibilities in Section 011000 Summary for

specific requirements.

2. Complete the Detailed Design, manufacture, supply, install and warrant the work,

complying with the visual intent indicated and specified design and performance

requirements.

3. Where no material, product or supplier is specified, propose suitable materials and

systems prior to the Contract award which comply with the visual intent indicated and

specified design and performance requirements, and be fully responsible for the

Detailed Design of the work.

4. Where a particular material, product or supplier is specified, the material, product or

supplier shall be deemed indicative representing the Engineer's Design Intent only.

Complete the installation using the specified or other product acceptable to the

Engineer, in writing. Be fully responsible for the Detailed Design and performance of

the work.

5. Complete the Detailed Design of all interfaces with adjoining trades prior to

commencement of manufacture.

6. Ensure that all interfaces are fully coordinated prior to commencement.

C. Section Includes

http://www.thefuturebuild.com/pages/disclaimer



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

2

1. Aluminum wall panels.

D. Related Work Sections and documentation

1. Section 050513 Shop Applied Coatings for Metal.

2. Section 050523 Metal Fastenings.

3. Section 079200 Joint Sealants.

4. Structural Engineer's specification.

5. Estidama Pearl Rating System (PRS) - The Pearl Rating System for Estidama,

Building Rating System: Design and Construction document by Abu Dhabi Urban

Planning Council (UPC).

6. Main Contractor Estidama PBRS and LEED CS Toolkit document.

7. LEED Green Building Rating System for Core and Shell Development, by U.S. Green

Building Council, Inc. (USGBC).

1.2 SUBMITTALS

A. Submittals

1. Product data on proposed materials.

2. List of tests included.

3. Summary of deviations from the Architectural Specification.

4. Outline technical specifications reflecting proposed materials/ systems.

5. A list of proposed suppliers and Subcontractors intended to be used.

B. Pre-contract Samples

1. Sample of metal wall panel system (600mm x 600mm) including both vertical and

horizontal joints and all gaskets.

2. Various color samples of all finish types 300mm x 300mm minimum size.

3. Various extrusions a minimum of 300mm in length.

4. Framing members.

5. All fastenings.

C. Post Contract Submittals

1. Shop Drawings showing the full extent of the work.

2. "Die Drawings" for metalwork to the Engineer for review. These shall be considered



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

3

as Shop Drawings. The "Die Drawings" shall indicate polished surfaces and shape.

3. Product Data on materials and components for use.

4. Supplementary Product Literature: Include a statement from the manufacturer for the

design life of the system.

5. Statement of manufacturer's review confirming suitability of specified materials.

D. Post Contract Samples

1. Sample of metal wall panel system (600mm x 600mm) including joint between panels.

2. Framing members.

3. All fastenings.

E. Sustainable Design Submittals: Submit the following items indicating compliance with the

limits and values established within the Main Contractor Estidama PBRS and LEED CS

Toolkit.

1. Environmental Submittals: Provide the following for items used on the project.

a) Submit Material Safety Data Sheets (MSDS) for all products or an acceptable

equivalent document.

b) Submit Volatile Organic Compound (VOC) values for field-applied adhesives,

paints, coatings and sealants.

1.3 CLOSEOUT SUBMITTALS

A. General:

1. Warranties.

2. Operation and Maintenance Manuals: Include component list with manufacturer's

reference numbers, descriptions of materials and procedures for repairing and

cleaning of finishes; and cleaning frequency.

B. Sustainable Criteria:

1. Sustainable source, BRE Green Guide rating.

2. Recyclability, including the identification of recyclable materials and values.

3. Recycled content, including pre-consumer and post-consumer percentages.

4. Regional source, including regionally manufactured materials and regionally

extracted and manufactured materials.

1.4 QUALITY ASSURANCE

A. Sustainability Requirements: Comply with the stated requirements within the Main



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

4

Contractor Estidama PBRS and LEED CS Toolkit document.

1. For field-applied adhesives, paints, coatings and sealants, use low-emitting products.

B. Contractor's Qualifications

1. A specialist with at least 10 years successful experience in performing similar work.

2. Certification to ISO 9001 or operates a similar quality system acceptable to the Engineer.

C. Fire-Resistance Ratings: Where indicated, provide metal wall panels identical to those of

assemblies tested for fire resistance in accordance with ASTM E 119 by a qualified

testing agency. Identify products with appropriate markings of applicable testing agency.

1. Indicate design designations from UL's "Fire Resistance Directory" or from the listings of

another qualified testing agency.

D. Mock-ups

1. Typical panel edge detail and joint configuration, in size to be agreed with the Engineer.

E. Prototypes

1. Integrated Exterior Mock-up with Section 072100 Thermal Insulation and Section

077100 Roof Specialties, size shall be 1m x 6m in plan,l-shaped configuration and

4.1m high. Include corner condition, sill flashing and coping at top of wall this is to

demonstrate interfaces, demountability and connection to substrate including vapor and

air barrier connectivity.

F. Quality Benchmark Installation

1. First installed structural bay of each type in location to be agreed with the Engineer.

G. Sustainability Standards Certifications: To be confirmed by the Engineer during the next

project stage.

H. Preconstruction Testing

1. All fastenings shall be tested by an independent Testing Authority acceptable to the

Engineer.

2. Include for testing by an accredited independent testing specialist or provide

independently certified test data to demonstrate compliance with the Architectural

Specification for the following:

a) Load testing.

b) Deflection testing.

c) Wind loads.

d) Thermal performance.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

5

e) Air permeability.

f) Capillarity.

g) Weather and water resistance.

h) Acoustic performance.

i) Electrical continuity testing.

3. Off-Site testing:

a) The Contractor may provide data from previous independently certified tests to

demonstrate that the Contractor's proposed systems meet the performance

requirements of the Architectural Specification. The information shall be to the

entire satisfaction of the Engineer.

b) The provision of testing data or the carrying out of tests does not relieve the

Contractor of his responsibilities regarding the performance requirements,

durability or service life requirements.

c) If suitable data to demonstrate compliance with the performance requirements is

not available, provide prototypes of each type and have them independently

tested in accordance with the testing criteria indicated in the Architectural

Specification.

d) Independently certified test data, as applicable, shall include static and dynamic

results, and certificates.

4. On-Site testing: The Contractor shall include for all on-Site testing specified herein.

1.5 DELIVERY, STORAGE AND HANDLING

A. Deliver and protect materials and components to prevent damage, staining or corrosion in

accordance with the manufacturer's recommendations. Package wall panels for protection

during transportation and handling. Do not deliver to Site until components can be

immediately unloaded into adequate storage or fixed in position.

B. Deliver and crate assemblies to withstand applicable wind and dead load forces during

transportation and handling without distortion or adverse effects from differential structural

and thermal movements.

C. Storage

1. Store materials in a dry, protected location off the ground in accordance with the

manufacturer's recommendations.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

6

2. All elements of framework and associated beads and strips shall be stored on Site such

that they shall not be damaged, distorted or weathered unevenly.

3. Stack wall panels horizontally on platforms or pallets, covered with suitable

weathertight and ventilated covering. Store wall panels to ensure dryness, with

positive slope for drainage of water. Do not store wall panels in contact with other

materials that might cause staining, denting, or other surface damage.

4. All finished components shall be carefully packed in pallet or crates such that they are

suitably separated and protected to prevent scratching, scuffing or other surface

damage.

5. All panels, sealants and gaskets shall be stored on Site in accordance with the

manufacturer's written recommendations

6. Retain strippable protective covering on wall panels for period of panel installation.

D. Protect foam-plastic insulation as follows.

1. Do not expose to sunlight, except to extent necessary for period of installation and

concealment.

2. Protect against ignition at all times. Do not deliver foam-plastic insulation materials to

Site before installation time.

3. Complete installation and concealment of plastic materials as rapidly as possible in

each area of construction.

E. Handling

1. Handle materials using methods and equipment without damage to members or

coatings. Inspect components before installation.

2. Replace items and materials that are scratched or otherwise damaged and

unsuitable for installation, to the acceptance of the Engineer.

1.6 ENVIRONMENTAL CONDITIONS

A. Weather Limitations: Proceed with installation only when existing and forecasted weather

conditions permit assembly of wall panels to be performed according to manufacturers'

written instructions and warranty requirements. Do not install any work on surfaces that are

dirty, wet or contaminated such that a proper bond, seating or fastening cannot be ensured.

B. Site Measurements: Verify locations of structural members and wall opening

dimensions by site measurements before wall panel fabrication, and

indicate measurements on predefined working drawings.

C. Temperature: Make allowance for differences between design temperature and



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

7

temperatures on Site during installation when sizing construction and movement joints.

1.7 PROJECT CONDITIONS

A. Loadings: Make allowance for differences between design loadings and loadings during

construction due to erection sequencing, and floor loading conditions when sizing

construction and movement joints.

1.8 WARRANTY

A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or

replace components of metal wall panel assemblies that fail in materials or workmanship

within specified warranty period.

1. Failures include, but are not limited to, the following:

a) Structural failures including rupturing, cracking, or puncturing.

b) Deterioration of metals and other materials beyond normal weathering.

2. Warranty Period: Two years from date of Taking-Over.

B. Special Warranty on Panel Finishes: Manufacturer's standard form in which manufacturer

agrees to repair finish or replace metal wall panels that show evidence of deterioration of

factory-applied finishes within specified warranty period.

1. Exposed Panel Finish: Deterioration includes, but is not limited to, the following:

a) Color fading more than 5 Hunter units when tested in accordance with ASTM D 2244.

b) Chalking in excess of a No. 8 rating when tested in accordance with ASTM D 4214.

c) Cracking, checking, peeling, or failure of paint to adhere to bare metal.

2. Finish Warranty Period: 20/ 10 years from date of Taking-Over.

PART 2 - PRODUCTS

2.1 PRODUCT SELECTION

A. Aluminum Panel Rainscreen Cladding System

1. Single skin flat panel metal wall panel rainscreen cladding system secret fixed back to

cladding rails including all supports and framing as required.

a) Preformed proprietary metal panel system. Aluminum facing sheet, 3mm

minimum thickness to comply with the performance requirements to provide flat or

profiled and rigid panels to tolerances specified.

b) Thickness of panels: To comply with the performance requirements and the

Design Intent as indicated on the Design Drawings.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

8

c) Suitable core insulation to suit composite panel construction.

d) Joints in cladding shall be male and female interlocking joints on all 4 sides of

panels with panel edge for horizontal and vertical joints, horizontal and vertical

joints to be of equal size and as indicated on the Design Drawings.

e) Panels shall be designed to span between supports as required.

f) Finish to face sheeting: Heat reflective super durable polyester powder coating

finish, to be confirmed by the Engineer during the next project stage. Refer to

Section 050513 Shop Applied Coatings for Metal.

g) Finish to supports/ cladding rails: Galvanized and/ or primed and painted in

accordance with the Structural Engineer's specification.

2. Rainscreen Cladding System

a) The rainscreen cladding system shall perform through either back draining and

ventilation, or pressure equalization principles.

b) An air gap shall be provided to the rear of the cladding panels to form a cavity

to suit rainscreen principles.

c) Components for lightning protection and earth bonding shall be concealed.

d) Support for the rainscreen cladding system shall be configured as indicated on the

Design Drawings, suitably fastened back to the primary structure in methods

acceptable to the Engineer.

e) Include vapor barriers, sheathing boards, waterproofing membranes, insulation

and other components as required to achieve the requirements of the

Architectural Specification and to achieve the details indicated on the Design

Drawings.

f) Determine the type, thickness and density of insulation and any integral or separate

overlay to satisfy the requirements of the Architectural Specification and as

indicated on the Design Drawings to the acceptance of the Engineer

g) Joints:

1. Unless otherwise indicated on the Design Drawings, joint widths and

configurations shall be as recommended by the manufacturer/ supplier for

acceptance by the Engineer and shall maintain the performance

requirements of the Architectural Specification.

2. Joints shall align with interfacing systems. Gaps within joints shall be uniform,

unless otherwise specified or indicated on the Design Drawings.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

9

3. Movement joints shall accommodate all specified movements whilst

maintaining the overall system performance. Movement joints shall appear as

similar to the standard rainscreen joint as possible, to the acceptance of the

Engineer.

h) Changes in direction shall be achieved using panels that are factory formed to

suit the configurations. Preformed return ends shall be provided where possible,

but for flat sheet materials, symmetrical mitred joints may be offered for

acceptance by the Engineer. Corner angle covers and lapped joints with visible

exposed core material shall not be acceptable. Site cutting of panels shall not be

permitted.

i) Rainscreens shall, where indicated on the Design Drawings or as agreed with the

Engineer, include stainless steel meshing to prevent the passage of birds and/ or

insects.

2.2 DESIGN CRITERIA

A. The Contractor shall be responsible for all aspects of construction, fabrication, detailing

and installation to comply with the Architectural Specification. This shall include ensuring

that all interfacing requirements relating to the building structure and other systems are

accommodated in accordance with the Structural Engineer's details, and that interfaces

with any external envelope elements are fully weathertight.

B. Dimensions are deemed to be nominal but indicative to the Design Intent. The

Contractor shall maintain these dimensions and clearly state them on the Shop Drawings;

deviations to these shall be stated with the Tender.

C. Systems shall include supports, brackets, fastenings, seals, sealants, compressible fills,

clips, spacers, isolators, gaskets and all other accessories/ components necessary to

complete the installation.

D. All support systems shall be of adequate thickness and strength to meet the structural

requirements and eliminate risk of distortion in finished surfaces.

E. ***Cladding Support System: Provide a structural steel cladding support system, as suitably

required, having due regard for any requirements in excess of primary structure indicated

on the Structural Engineer's drawings and also any requirements indicated on the

Design Drawings. The support system shall comply with the Structural Engineer's

steelwork specification, including protective coatings.***

F. The work shall comply with the visual requirements indicated on the Design Drawings and

provide a consistent finish to all surfaces.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

10

G. The Contractor shall propose grades and thickness to suit service conditions and meet

performance requirements.

H. Materials used for fastening shall be stainless steel grade 316. Fastenings shall be

concealed or inconspicuous to the acceptance of the Engineer.

I. Agree with the Engineer the period during which the sealant shall not change in appearance

or color. Any discoloration of sealant during this time shall not be acceptable.

J. Sealant performance shall be verified by provision of current independent test certificates.

2.3 PERFORMANCE REQUIREMENTS

A. General Performance

1. Wall panel assemblies shall comply with performance requirements without failure due

to defective manufacture, fabrication, installation, or other defects in construction.

B. Structural Performance Requirements

1. Provide wall panel assemblies capable of withstanding the effects of the following

loads and stresses within limits and under conditions indicated, based on testing in

accordance with ASTM E 1592 / ASTM E 330:

a) Wind Loads: Determine loads based on the following minimum design wind

pressures:

1. Uniform pressure of ***957 Pa/ 1436 Pa***, acting inward or outward.

b) Deflection Limits:

1. Metal wall panel: Assemblies shall withstand wind loads with horizontal

deflections no greater than ***1/ 180 or 1/ 240*** of the span.

2. Metal faced composite wall panel assemblies shall withstand wind loads with

horizontal deflections no greater than ***1/ 175*** of the span at the perimeter

and ***1/ 60*** of the span anywhere in the panel.

2. Specific Movements:

a) The work shall withstand all movement of the structure under all design

loads or combination of loads without damage or reduction in performance.

b) Expansion and movement joints shall accommodate the appropriate range of

movement.

3. Specific Live Loads:

a) The work shall be capable of accommodating the following specific live loads

without any reduction in performance:



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

11

1. Horizontally applied loads acting on the surface of any component. The

work shall sustain safely, without reduction in performance and without

permanent deformation to any component, a static 500N load applied

horizontally through a square of 100mm sides on any part of the framing.

2. A horizontal line load applied to the work, due to the occupants.

C. Thermal Movements

1. All components shall resist thermal movement resulting from the maximum and

minimum surface temperature differentials occurring. The design shall cater for all

temporary and permanent conditions envisaged for the work.

2. The work shall be capable of accommodating changes in dimension and shape of its

components resulting from the varying surface temperatures without any reduction in

the specified performance.

3. Thermal movements shall not result in audible noise.

D. Environmental Performance Requirements

1. Moisture Movement:

a) The work shall withstand movement without permanent deformation or any

reduction in the specified performance:

1. Due to changes in the moisture content of its components, resulting from

variations in the moisture content of the air.

2. Due to the expansion of absorbed or retained moisture caused by freezing.

3. Caused by the flow of rainwater to the inside of the panels.

2. Thermal Performance Requirements:

a) The average thermal transmittance (U-value) for the work shall be ***0.35***W/

m²K or better.

b) Provide U-value calculations including condensation calculations to justify

insulation and vapor barrier design.

3. Solar Performance Requirements:

a) Exposure to sunlight during the service life of the work shall not result in

degradation of appearance or performance.

4. Air Permeability/ Infiltration: The work shall resist the passage of air such that its air

leakage rates and shall not be exceeded in both the initial and repeat tests.

a) Air Infiltration: Air leakage through assembly of not more than ***0.3 L/ s per



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

12

m2*** of wall area when tested in accordance with ASTM E 283 at the following

test-pressure difference:

5. Test-Pressure Difference: ***75 Pa.***

6. Condensation: No condensation shall take place either on internal or external surfaces,

or within the interstitial construction thickness of the work under the temperature and

humidity conditions listed in ***Division 01***.

7. Capillarity: Water migration caused by capillarity shall be prevented to areas that are

designed to remain dry.

8. Weather and Water Penetration Resistance: The work, including flashings and

junctions with adjacent components, shall be fully weatherproof and watertight under

all conditions with full allowance made for deflections and other movements.

a) Water Penetration under Static Pressure: No water penetration when tested in

accordance with ASTM E 331 at the following test-pressure difference:

1. Test-Pressure Difference: ***300 Pa.***

b) Water Penetration under Dynamic Pressure: No evidence of water leakage when

tested according to AAMA 501.1 under dynamic pressure equal to 20% of inward-

acting, wind-load design pressure of not less than ***300 Pa*** and not more than

***575 Pa.***

1. Water Leakage: As defined according to AAMA 501.1.

2. Water Leakage: Uncontrolled water infiltrating the system or appearing on

system's normally exposed interior surfaces from sources other than

condensation. Water controlled by flashing and gutters that is drained back

to the exterior and cannot damage adjacent materials or finishes is not water

leakage.

E. Building Envelope Verification: Provide building envelope verification for the Work of this

Section as stated in Credit IDP-4 within the UPC's Pearl Building Rating System: Design &

Construction document.

F. Acoustic Performance Requirements

1. Sound Insulation:

a) The Work shall provide the sound insulation levels specified, which shall be

achieved on Site for each type, inclusive of all services penetrations and interfaces

with other elements.

G. Fire Performance Requirements



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

13

1. Specific Fire Performance Requirements:

a) Elements of the work shall be either non-combustible or not easily ignitable with

low flame spread characteristics and shall not produce excessive quantities of

smoke or toxic gases.

b) Surface spread of flame: In accordance with UL 723 and ASTM E 84.

2. Fire and smoke stopping:

a) Provide all cavity barriers to meet the requirements of the NFPA.

b) Fire and smoke stops shall be positively fixed in position in such a manner that

they will not become dislodged in the event of a fire.

H. Durability Performance Requirements

1. General:

a) The performance criteria shall be satisfied for the full design life of the work, as

stated by the Architectural Specification, provided always that the maintenance

has been carried out as specified.

b) Metal sheets shall not suffer bowing, dimpling, oil canning, sagging, pillowing,

rippling, warp, abrupt transitions and other visual deformation or irregularity.

2. Impact and Abrasion Resistance:

a) Generally, surfaces shall be sufficiently hard to resist heavy impacts from hand-

held objects without any noticeable change to the surface appearance. The work

shall resist abrasion from cleaning methods and maintenance systems without any

noticeable change in surface appearance.

b) Impact tests shall be carried out on all work assemblies adjacent to pedestrian areas.

c) The extent of any damage determined through testing shall be recorded and,

where possible, quantified. Samples shall be submitted to the Engineer.

d) Details of tests shall be provided to demonstrate the performance of materials and

finishes in resisting abrasion from pedestrian traffic (hands, rings, luggage, cloth,

shoes, etc.) and any other abrasion resulting from adjacent traffic movements.

3. Demountability:

a) Elements of the work shall be individually and independently removable ensuring

access for maintenance and/ or replacement of panels in the event of damage.

b) The removal of panels shall not affect the performance or safety of adjacent or



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

14

any other part of the work.

2.4 MATERIALS

A. Low Toxicity Materials: All building materials shall comply with the low toxicity material

requirements as stated in PBRS Credit SM-1 within the UPC's Pearl Building Rating System:

Design & Construction document.

B. To meet this PBRS Credit, all building materials must not contain materials or compounds

with over 1% of constituent materials with the designated R-phrases listed in the UPC

document. Submit confirmation that materials comply with the EU Risk Phrases (R-

Phrases) Directive 67/ 548/ EEC. Annex III.

C. Regional Material Components: Provide materials sourced from the region that comply

with the requirements as stated in PBRS Credit SM-9 within the UPC's Pearl Building

Rating System:

D. Panel Materials

1. Metallic-Coated Steel Sheet:

a) Restricted flatness steel sheet metallic coated by the hot-dip process and pre-

painted by the coil-coating process in accordance with ASTM A 755/ A 755M.

b) Zinc-Coated (Galvanized) Steel Sheet: In accordance with ASTM A 653/ A 653M,

***G90 Z275*** coating designation; structural quality.

c) Aluminum-Zinc Alloy-Coated Steel Sheet: In accordance with ASTM A 792/ A

792M,

***Class AZ50 coating designation, Grade 40 / Class AZM150 coating

designation, Grade 275***; structural quality.

d) Refer to ***Section 050513 Shop Applied Coatings to Metal.***

e) Refer to ***Section 099100 Painting.***

2. Aluminum Sheet:

a) Coil-coated sheet, in accordance with ASTM B 209M, alloy as standard with

manufacturer, with temper as required to suit forming operations and structural

performance required.

b) Only appropriate grades, strengths and thicknesses of aluminum shall be used to

ensure that all structural and finishing requirements of the Architectural

Specification are met. The wall thicknesses of aluminum extrusions shall be

sufficient to ensure their rigidity in the lengths required in the final installation.

3. Panel Sealants:



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

15

a) VOC Content: Sealant products shall comply with VOC limits as stated in PBRS

Credit LBi-2.1 within the UPC's Pearl Building Rating System: Design &

Construction document.

b) Refer to Section 079200 Joint Sealants.

c) Sealant Tape: Pressure-sensitive, 100% solids, gray polyisobutylene compound

sealant tape with release-paper backing. Provide permanently elastic, non-sag,

nontoxic, non-staining tape 13mm wide and 3mm thick.

d) Joint Sealant: In accordance with ASTM C 920; elastomeric polyurethane,

polysulfide, or silicone sealant; of type, grade, class, and use classifications

required to seal joints in metal wall panels and remain weathertight; and as

recommended in writing by metal wall panel manufacturer.

e) Butyl-Rubber-Based, Solvent-Release Sealant: In accordance with ASTM C 1311.

E. ***Site-Installed Thermal Insulation***

1. Refer to ***Section 072100 Thermal Insulation.***

2. The insulation shall be inert, durable, rot-proof and vermin-proof and not be

degradable by moisture, extreme temperatures or water vapor.

3. The insulation shall not bulge, sag, delaminate or detach during its installation or in

situ during the life of the work.

4. Insulation shall have zero Ozone Depleting Potential (ODP), be CFC and HFC free

and have a Global Warming Potential (GWP) of less than five.

5. Unfaced, Polyisocyanurate Board Insulation: In accordance with ASTM C 591, Type

II, compressive strength of ***241kPa***, with maximum flame-spread index of 75 and

smoke-developed index of 450.

6. Foil-Faced, Polyisocyanurate Board Insulation: In accordance with ASTM C 1289,

with maximum flame-spread and smoke-developed indexes of 75 and 450,

respectively, complying with ASTM E 84.

7. Extruded-Polystyrene Board Insulation: In accordance with ASTM C 578, Type IV,

***26kg/ m³***, with maximum flame-spread index of 75 and smoke-developed index of

450.

8. Molded-Polystyrene Board Insulation: In accordance with ASTM C 578, ***Type I,

15kg/ m³/ Type II, 22kg/ m³***, with maximum flame-spread index of 75 and smoke-

developed index of 450.

9. Unfaced, Glass-Fiber Board Insulation: In accordance with ASTM C 612, Type IA or



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

16

Types IA and IB; with maximum flame-spread index of 25 and smoke-developed index

of 50, and with a nominal density of ***48 kg/ /m³.***

F. Miscellaneous Materials

1. Panel Fasteners:

a) Self-tapping screws, bolts, nuts, self-locking rivets and bolts, end-welded studs,

and other suitable fasteners designed to withstand design loads. Provide

exposed fasteners with heads matching color of metal wall panels by means of

plastic caps or factory-applied coating. Provide EPDM, PVC, or neoprene sealing

washers.

2. Metal Framing:

a) Miscellaneous Metal Framing, General: In accordance with ASTM C 645, cold-

formed metallic-coated steel sheet, ***ASTM A 653/ A 653M, G40 (Z120) hot-dip

galvanized/ ASTM A 653/ A 653M, G60 (Z180) hot-dip galvanized*** or coating

with equivalent corrosion resistance unless otherwise indicated.

b) Fasteners for Miscellaneous Metal Framing: Of type, material, size, corrosion

resistance, holding power, and other properties required to fasten miscellaneous

metal framing members to substrates.

c) Aluminum extrusions: In accordance with ASTM B 221/ ASTM B 221M, alloy and

temper recommended by manufacturer for type of use and finish as indicated.

G. Fastenings

1. General: Provide factory-formed metal wall panels designed to be site assembled by

lapping.

2. All necessary fastenings shall be installed for the work.

3. Direct contact between aluminum or aluminum alloys and treated timber shall be

avoided, unless with the prior acceptance of the Engineer.

4. Visible fastenings shall match accepted samples.

5. Unless otherwise specified, the following basic requirements shall be adhered to:

a) Rigidity: Only fastenings that are suited to the likely stresses, movements and

vibrations in use without allowing any wobble, creaks or deflection of any

fixtures or fittings shall be used.

b) Removability: Items that require accessibility or removal shall be fixed with bolts.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

17

6. Fasteners: Type and alloy as required for proper strength and to prevent galvanic

action with materials fastened. Exposed fasteners shall have countersunk

***Phillips*** head with finish to match adjacent surface.

7. Refer to Section 050523 Metal Fastenings for additional requirements.

H. Supports

1. Aluminum split battens on softwood packing pieces to take panelling out to the

designed wall thickness; fixed to partitions or solid wall. Fastenings to suit metal

stud or solid partitions as appropriate.

2. Softwood split battens fixed to partitions or solid wall. Fastenings to suit metal stud

or solid partitions. Battens to be as follows:

a) Regularised softwood free from decay and active insect attack and with no knots

wider than half the width of the section.

b) Moisture content at the time of fastenings shall not exceed ***18%.***

c) Battens screwed to studs as appropriate or screwed and plugged to solid walls.

d) Support system shall be capable of maintaining a consistent overall wall thickness.

I. Welding Electrodes: Alloy and type required for strength and compatibility of metals welded.

J. Gasket Extrusions: Provide neoprene gasket extrusions or acceptable equivalent as a

sustainable option to uPVC to the acceptance of the Engineer.

1. Non-Polluting Materials: Provide non-polluting materials that comply with the

requirements as stated in PBRS Credit SM-1 within the UPC's Pearl Building Rating

System: Design & Construction document.

K. Inserts: Stainless steel Type 316 of suitable design and strength to suit application.

L. ***Shims: Horseshoe type made from stainless or suitably coated steel where concealed.

Use sleeve type spacers of stainless steel for visible shims.***

M. Breather Membrane Material: Spun bonded polypropylene or similar to meet the

performance requirements.

1. Profile Fillers.

2. Type(s) supplied by the manufacturer accurately matching sheet profile and

perforated ventilation and drainage of condensation at centers of crowns/ troughs as

appropriate.

N. Fire Resisting Profile Fillers: Types(s) supplied by the manufacturer accurately matching sheet

profile.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

18

O. Vapor Control Layer Material: High performance reinforced membranes of foil or plastics,

protected both sides by rigid facings/ linings to give a Class spread of flame to meet the

performance criteria specified.

P. Isolating Tape: A type recommended for the purpose by the manufacturer. Apply to those

surfaces of supports that would otherwise be in contact with work or accessories after

fastening.

Q. Accessories

1. Wall Panel Accessories:

a) Provide components required for a complete wall panel assembly including trim,

copings, fasciae, mullions, sills, corner units, clips, flashings, sealants, gaskets,

fillers, closure strips, and similar items. Match material and finish of wall panels,

unless otherwise indicated.

1. Closures: Provide closures at eaves and rakes, fabricated of same metal as

metal wall panels.

2. Backing Plates: Provide metal backing plates at panel end splices,

fabricated from material recommended by manufacturer.

3. Closure Strips: Closed-cell, expanded, cellular, rubber or crosslinked,

polyolefin-foam or closed-cell laminated polyethylene; minimum 25mm thick,

flexible closure strips; cut or pre-molded to match metal wall panel profile.

Provide closure strips where indicated or necessary to ensure weathertight

construction.

b) Flashing and Trim: Formed from 0.46mm minimum thickness, zinc-coated

(galvanized) steel sheet or aluminum-zinc alloy-coated steel sheet prepainted with

coil coating. Provide flashing and trim as required to seal against weather and to

provide finished appearance. Locations include, but are not limited to, bases, drips,

sills, jambs, corners, endwalls, framed openings, rakes, fasciae, parapet caps,

soffits, reveals, and fillers. Finish flashing and trim with same finish system as

adjacent metal wall panels.

2.5 FABRICATION

A. General

1. Fabricate and finish wall panels and accessories at the factory to greatest extent

possible, by manufacturer's standard procedures and processes, as necessary to fulfill

indicated performance requirements demonstrated by laboratory testing. Comply with

indicated profiles and with dimensional and structural requirements.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

19

2. Fabricate wall panels in a manner that eliminates condensation on interior side of panel

and with joints between panels designed to form weathertight seals.

3. Provide panel profile, including major ribs and intermediate stiffening ribs, if any, for full

length of panel.

4. Fabricate wall panel joints with factory-installed captive gaskets or separator strips that

provide a tight seal and prevent metal-to-metal contact, and that will minimize noise

from movements within panel assembly.

B. Metal-Faced Composite Wall Panels

1. Factory form panels in a ***continuous process with no glues or adhesives/ batch

process by laminating each sheet using glues or adhesives*** between dissimilar

materials. Trim and square edges of sheets with no displacement of face sheets or

protrusion of core material.

2. Form panel lines, breaks, and angles to be sharp and true, with surfaces free from

warp and buckle.

3. Fabricate panels with sharply cut edges, with no displacement of face sheets or

protrusion of core material.

4. Fabricate panels with panel stiffeners, as required to comply with deflection limits,

attached to back of panels with structural silicone sealant or bond tape.

5. Dimensional Tolerances:

a) Panel Bow: ***0.8***% maximum of panel length or width.

b) Squareness: 5mm maximum.

C. Cladding Support System

1. Provide a structural steel cladding support system, as necessary, having due regard

for any requirements in excess of primary structure indicated on the Structural

Engineer's drawings and also any requirements indicated on the Design Drawings. The

support system shall comply with the Structural Engineer's specification, including

protective coatings.

D. Tolerances for Manufacture

1. Design tolerances shall be adhered to.

2. The provisions intended to accommodate the construction tolerances of the

surrounding elements shall be shown on the Shop Drawings and further information

shall be obtained from the Engineer as necessary when completing the Shop Drawings.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

20

3. Specific tolerances shall be adhered to. A very high degree of accuracy is

required in the tolerance of work, as set out below:

a) Level of horizontal members: ±1mm from datum in 1500mm non-cumulative.

b) Plumb of vertical members: To be confirmed by the Engineer during the next project

stage.

4. The detailed list of tolerances to which the work components shall be fabricated

within the requirements of the Architectural Specification and overall geometric

requirements shall be submitted with the tenders. All tolerances shall be submitted for

review by the Engineer.

5. As a minimum, the statement of tolerances shall include the following:

a) Thickness.

b) Out-of-plan.

c) Straightness normal to plane.

d) Longitudinal.

e) Horizontal.

f) Vertical.

g) Diagonal.

h) Eccentricity.

6. All finished metal surfaces shall be flat and free from undulations and irregularities.

a) Twist: ±1.5mm - there shall be no warping of frame.

b) Line of panel: ±2mm overall difference between adjacent standards.

E. Lightning Protection

1. Bonding is required between individual sections of the work to ensure continuity

between adjacent sections, both vertically and horizontally over the whole façade.

2. Bonding between the work and structural steelwork shall be carried out at intervals as

indicated on the Design Drawings. The first level of bonding to the structural

steelwork shall be at the highest floor level of each part of the building.

3. Provide studs/ bolts on the cladding for subsequent connection.

4. All straps/ connections shall be concealed.

5. No straps shall be fixed along copings.

F. Sheet Metal Accessories



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

21

1. Fabricate flashing and trim to comply with recommendations in SMACNA's

"Architectural Sheet Metal Manual" that apply to design, dimensions, metal, and other

characteristics of item indicated.

2. Form exposed sheet metal accessories that are without excessive oil canning, buckling,

and tool marks and that are true to line and levels indicated, with exposed edges

folded back to form hems.

3. Aluminum flashings shall be at least 1.6mm thick. Aluminum sheet for copings, panels

and visible closers shall be sufficiently thick to provide a visually flat surface and to

eliminate excessive distortion and permanent deformation caused by solar radiation.

4. Flashings to receive ***polyester powder coat finish or PVDF*** finish to match the

relevant adjacent metal cladding. Exact type of finish and colour shall be agreed.

5. Longitudinal joints shall have lapped or interconnecting joints, which shall be fully

weather sealed. Simple butt joints and butt straps will not be acceptable. Joints,

sealants, etc. shall be designed to be capable of accommodating thermal movements of

all flashings.

6. Electrical continuity shall be achieved between conductive parts. Provision shall be

made for lightning protection integration requirements.

7. Aluminum flashings shall be treated with anti-drumming insulation on the hidden face.

8. Seams for Aluminum: Fabricate non-moving seams with flat-lock seams. Form seams

and seal with epoxy seam sealer. Rivet joints for additional strength.

9. Seams for Other Than Aluminum: Fabricate non-moving seams in accessories with

flat-lock seams. Tin edges to be seamed, form seams, and solder.

10. Sealed Joints: Form non-expansion but movable joints in metal to accommodate

elastomeric sealant to comply with SMACNA standards.

11. Conceal fasteners and expansion provisions where possible. Exposed fasteners are not

allowed on faces of accessories exposed to view.

12. Fabricate cleats and attachment devices from same material as accessory being

anchored or from compatible, noncorrosive metal recommended by metal wall panel

manufacturer.

G. ***Cutting

1. Saw-cut or shear metal edges square and sharp without causing distortion or

discoloration to surfaces. Do not use flame-cutting equipment.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

22

2. Grind cut edges to remove burrs, saw marks and blemishes from exposed edges, or

alternatively by welding and grinding.

3. Dress meeting faces of joints to produce a proper fit. Grind site splices smooth, flush and

square.

4. Machine drill or mill holes and similar cut-outs.***

H. ***Bending: Bend sheet metal to the required shape. Bent items shall be free of grain

separation, oil canning or other distortion. Back-cut sheets to attain maximum square bend

possible.***

2.6 FINISHING

A. General

1. Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal

Products" for recommendations for applying and designating finishes.

2. Carry out welding, cutting and machining before applying protective coating and finishes.

3. Prime visible surfaces of non-ferrous metals. Prime all surfaces, including joint faces,

of ferrous metal fabrications. Do not paint surfaces within 50mm of Site welds;

prepare and finish after connections are completed.

4. Apply finishes to visible surfaces of non-ferrous and ferrous metals in accordance with

the paint manufacturer's instructions.

5. Prime paint items to receive Site-applied paint in accordance with Section 099100

Painting.

6. Appearance of Finished Work: Variations in appearance of abutting or adjacent

pieces are acceptable if they are within one-half of the range of approved Samples.

Noticeable variations in the same piece are not acceptable. Variations in appearance

of other components are acceptable if they are within the range of approved Samples

and are assembled or installed to minimize contrast.

7. Shop Applied Finishes: In accordance with Section 050513 Shop Applied Coatings for

Metals.

8. Site Applied Paint: In accordance with Section 099100 Painting.

9. Protect mechanical and painted finishes on exposed surfaces from damage by

applying a strippable, temporary protective covering before shipping.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

23

PART 3 - EXECUTION

3.1 EXAMINATION

A. Verification of Conditions: Prior to commencing installation, examine substrates, adjacent

construction and conditions in which the work will be installed. Verify dimensions of

supporting construction and surfaces to receive the work of this Section. Notify the Engineer

of unsatisfactory conditions.

B. Examine wall framing to verify that girts, angles, channels, studs, and other structural

panel support members and anchorage have been installed within alignment tolerances

required by metal-faced composite wall panel manufacturer.

C. Examine wall sheathing to verify that sheathing joints are supported by framing or blocking

and that installation is within flatness tolerances required by metal wall panel manufacturer.

D. Verify that weather-resistant sheathing paper has been installed over sheathing or backing

substrate to prevent air infiltration or water penetration.

E. For the record, prepare written report, endorsed by Installer, listing conditions detrimental

to performance of work.

F. Examine roughing-in for components and systems penetrating metal wall panels to

verify actual locations of penetrations relative to seam locations of metal wall panels

before metal wall panel installation.

G. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2 PREPARATION

A. Dimensions and levels of the structure shall be verified.

B. Setting out shall be such that all panels are installed in the correct position, within

tolerance, and in the correct relationship to the building structure.

C. Miscellaneous Framing: Install subgirts, base angles, sills, furring, and other miscellaneous

wall panel support members and anchorages in accordance with ASTM C 754 and metal

wall panel manufacturer's written recommendations.

1. Soffit Framing: Wire-tie ***or clip*** furring channels to supports ***as required to

comply with requirements for assemblies indicated.***

3.3 INSTALLATION

A. General

1. All work shall be true to detail with continuous profiles, which shall be free from marks,

defects, flaws, steps, waves, or damage of any nature.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

24

2. All panels shall be mounted so that they are all correctly and consistently orientated.

3. All fastening bolts and anchors shall be installed in accordance with the

manufacturer's recommended procedures.

4. Materials shall be dry until fixed.

5. Acceptance shall be obtained from the Engineer before drilling or cutting parts of the

structure, other than where shown on the Shop Drawings.

6. Isolating tape, plastic washers or other suitable means to prevent bi-metallic corrosion

between dissimilar metals shall be used.

7. Bars shall be set out at evenly spaced centers, straight, parallel and truly aligned

with other features, where shown on the Shop Drawings.

8. The finished work shall be square, regular, true to line, level and plane, with a

satisfactory fit at all junctions.

9. Assembly of Panels:

a) The panels shall be profiled or flat (1:1000) and assembled in order to achieve true

straight lines, both horizontally and vertically for the full width and height of the

building.

b) Panels shall have sharp corners to create 90° corners with joints occurring as

indicated on the Design Drawings. Panels to be hermetically sealed with facing

enclosing insulation with no possibility of delamination taking place.

c) All corners shall be flat, flush and true.

d) Opening panels shall be secret without visible means of opening.

10. Corners: All corner conditions shall appear identical at each level or as indicated on

the Design Drawings.

11. Cradle Fastenings: Cradle fastenings shall appear as an integral part of the system.

12. Movement Joints: The requirement for any movement/ expansion joints within the work

shall be ascertained in order to accommodate all movements stated herein.

Maintenance of the joints shall be by visual inspection.

13. Fastenings:

a) Securely anchor work to supporting structure. Use expansion bolts for concrete

and masonry, machine screws or bolts for metal, and screws for timber.

b) Shim bearing surfaces, or provide spacing items, for a proper installation.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

25

c) Use only shop-drilled holes for the assembling items, unless otherwise accepted.

When acceptable Site drill holes in accepted locations.

d) Set fasteners with heads parallel to the surface; set countersunk heads flush.

e) Use countersunk fastenings where in physical contact with the body, to prevent

injury.

f) Adequate measures shall be taken to prevent bimetallic corrosion between

dissimilar metals and to isolate aluminum components from cementitious

surfaces. To this end attention is drawn to publication PD 6484 'Commentary

on corrosion at bimetallic contacts and its alleviation.

g) Visible fastenings shall be restricted to the assembly of non-visible elements to

support steelwork, using round-headed Allen bolts into a proprietary system.

h) Any steel sub-frame assemblies shall be galvanized and effectively weatherproofed

to avoid exposure to the external environment.

i) Provide cast-in channel fastenings in concrete and fastenings directly made to

structural steelwork.

j) Carry out all necessary preparation work such as drilling, plugging, screwing,

bolting, cutting for anchor bolts or sockets to be cast-in and for making good,

including grouting-in of anchor bolts and fastenings where necessary.

k) The method of fastening shall not damage anything being fixed or anything

receiving fastenings.

l) Welding shall not be permitted, unless accepted by the Engineer.

m) Fasteners shall be installed with a coordinated purpose design tooling system

that incorporates a mechanical depth locator to ensure consistent depth setting

and facilitates perpendicular installation. The fastener manufacturer shall be

capable of providing on-Site instruction in the use of the fastener installation tooling

system.

n) Ensure that no lock-up stresses are generated.

14. Adhesives:

a) Surfaces to receive adhesive shall be sound and free from dust, grease and

any other contamination likely to affect bond. Where necessary, clean surfaces

using methods and materials recommended by the adhesive manufacturer.

b) Surfaces shall be sufficiently smooth and even to suit the gap-filling and bonding

characteristics of the adhesive. Prepare as necessary.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

26

c) Operatives shall observe both the manufacturers' and statutory requirements for

storage and safe usage of adhesives.

d) No adhesives shall be used in unsuitable environmental conditions or beyond

the manufacturer's recommended maximum shelf life or open-pot time periods.

e) Adhesives shall be applied using recommended spreaders/ applicators to ensure

correct coverage. Bring surfaces together within the recommended time period and

apply pressure evenly over the full area of contact surfaces to ensure full bonding.

f) Surplus adhesive shall be removed using methods and materials recommended

by the adhesive manufacturer and without damage to affected surfaces.

B. Fire Protection: Install fire protective materials in accordance with ***Section

078200 Board Fireproofing ***, to achieve the required fire performance.

C. Thermal Insulation Installation

1. Board Insulation: Extend insulation in thickness indicated to cover entire wall.

Comply with installation requirements in Section 072100 Thermal Insulation.

a) Erect insulation horizontally and hold in place with Z-shaped furring members

spaced 24 610mm o.c.. Attach furring members to substrate with screws spaced

610mm o.c.

b) Retain insulation in place by metal clips and straps or integral pockets within

panels, spaced at intervals according to insulation manufacturer's instructions.

Maintain cavity width between insulation and metal liner panel of dimension

indicated.

2. Blanket Insulation: Install insulation concurrently with metal wall panel installation, in

thickness indicated to cover entire wall, according to manufacturer's written instructions

and as follows:

a) Set insulation on top of vapor barrier at substrate as indicated on the Design

Drawings. Do not obstruct ventilation spaces, except for firestopping.

b) Tape joints and ruptures in vapor retarder, and seal each continuous area of

insulation to surrounding construction to ensure airtight installation.

c) Install insulation straight and true in one-piece lengths. Comply with the following

installation method:

1. Over-Framing Installation: Extend insulation over and perpendicular to top

flange of framing members.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

27

d) Retainer Strips: Install retainer strips at each longitudinal insulation joint, straight

and taut, nesting with framing to hold insulation in place.

D. Metal Wall Panel Installation

1. General:

a) Install metal wall panels according to manufacturer's written instructions in

orientation, sizes, and locations indicated on Design Drawings. Install panels

perpendicular to girts and subgirts unless otherwise indicated. Anchor metal wall

panels and other components of the work securely in place, with provisions for

thermal and structural movement.

1. Commence metal wall panel installation and install minimum of 27.8m² in

presence of factory-authorized representative.

2. Shim or otherwise plumb substrates receiving metal wall panels.

3. Flash and seal metal wall panels at perimeter of all openings. Fasten with self-

tapping screws. Do not begin installation until weather barrier and flashings

that will be concealed by metal wall panels are installed.

4. Install screw fasteners in predrilled holes.

5. Locate and space fastenings in uniform vertical and horizontal alignment.

6. Install flashing and trim as metal wall panel work proceeds.

7. Locate panel splices over, but not attached to, structural supports. Stagger

panel splices and end laps to avoid a four-panel lap splice condition.

8. Apply elastomeric sealant continuously between metal base channel (sill

angle) and concrete and elsewhere as indicated or, if not indicated, as

necessary for waterproofing.

9. Align bottom of metal wall panels and fasten with blind rivets, bolts, or self-

tapping screws. Fasten flashings and trim around openings and similar

elements with self-tapping screws.

10. Provide weathertight escutcheons for pipe and conduit penetrating exterior walls.

2. Fasteners:

a) Steel Wall Panels: Use stainless-steel fasteners for surfaces exposed to the

exterior; use galvanized steel fasteners for surfaces exposed to the interior.

b) Aluminum Wall Panels: Use aluminum or stainless-steel fasteners for surfaces

exposed to the exterior; use aluminum or galvanized steel fasteners for surfaces



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

28

exposed to the interior.

c) Copper Wall Panels: Use copper, stainless-steel or hardware-bronze fasteners.

d) Stainless-Steel Wall Panels: Use stainless-steel fasteners.

3. Metal Protection: Where dissimilar metals will contact each other or corrosive

substrates, protect against galvanic action as recommended by metal wall panel

manufacturer.

4. Joint Sealers:

a) Install gaskets, joint fillers, and sealants where indicated and where required

for weathertight performance of metal wall panel assemblies. Provide types of

gaskets, fillers, and sealants indicated or, if not indicated, types recommended by

metal wall panel manufacturer.

b) Seal metal wall panel end laps with double beads of tape or sealant, full width of

panel. Seal side joints where recommended by metal wall panel manufacturer.

c) Prepare joints and apply sealants to comply with requirements in ***Section

079200 Joint Sealants.***

5. Attachment System Installation:

a) General:

1. Install attachment system required to support metal-faced composite wall

panels and to provide a complete weathertight wall system, including

subgirts, perimeter extrusions, tracks, drainage channels, panel clips, and

anchor channels.

a) Include attachment to supports, panel-to-panel joinery,

panel-to-dissimilar-material joinery, and panel-system joint seals.

b) Do not begin installation until weather barrier and flashings that will be

concealed by composite panels are installed.

6. Clip Installation:

a) Attach panel clips to supports at each metal-faced composite wall panel joint at

locations, spacings, and with fasteners recommended by manufacturer. Attach

routed-and-returned flanges of wall panels to panel clips with manufacturer's

standard fasteners.

1. Seal horizontal and vertical joints between adjacent panels with sealant

backing and sealant. Install sealant backing and sealant according to



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

29

requirements specified in

***Section 079200 Joint Sealants.***

7. Track-Support Installation:

a) Provide manufacturer's standard horizontal and vertical tracks that provide

support and complete secondary drainage system, draining to the exterior at

horizontal joints. Install support system at locations, spacings, and with fasteners

recommended by manufacturer. Attach panels to wall by interlocking tracks

with perimeter extrusions attached to wall panels. Fully engage integral

gaskets and leave horizontal and vertical joints with open reveal.

1. Attach routed-and-returned flanges of wall panels to perimeter extrusions

with manufacturer's standard fasteners.

2. Attach flush wall panels to perimeter extrusions by engaging panel edges

and by attaching with manufacturer's standard structural silicone adhesive.

3. Install wall panels to allow individual panels to 'free float' and be installed and

removed without disturbing adjacent panels.

4. Do not apply sealants to joints unless otherwise indicated on Design Drawings.

8. Subgirt-and-Spline Installation:

a) Provide manufacturer's standard subgirts and splines that provide support and

complete secondary drainage system, draining to the exterior at horizontal

joints. Install support system at locations, spacings, and with fasteners

recommended by manufacturer. Attach wall panels by interlocking perimeter

extrusions attached to routed-and-returned flanges of wall panels with subgirts and

splines. Fully engage integral subgirt-and-spline gaskets and leave horizontal and

vertical joints with open reveal.




9. Rainscreen-Principle Installation:

a) Provide manufacturer's standard pressure-equalized, rainscreen-principle system

with vertical channel that provides support and complete secondary drainage

system, draining at base of wall. Notch vertical channel to receive support pins.

Install vertical channels supported by channel brackets or adjuster angles and

at locations, spacings, and with fasteners recommended by manufacturer. Attach



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

30

wall panels by engaging horizontal support pins into notches in vertical channels

and into flanges of wall panels. Leave horizontal and vertical joints with open

reveal.




E. Metal Soffit Panel Installation

1. Metal Soffit Panels: Provide metal soffit panels full width of soffits. Install panels

perpendicular to support framing.

a) Flash and seal panels with weather closures where metal soffit panels meet

walls and at perimeter of all openings.

F. Accessory Installation

1. General: Install accessories with positive anchorage to building and weathertight

mounting, and provide for thermal expansion. Coordinate installation with flashings and

other components.

a) Install components required for a complete metal wall panel assembly including

trim, copings, corners, seam covers, flashings, sealants, gaskets, fillers, closure

strips, and similar items.

2. Flashing and Trim: Comply with performance requirements, manufacturer's written

installation instructions, and SMACNA's "Architectural Sheet Metal Manual."

a) Provide concealed fasteners where possible, and set units true to line and level as

indicated. Install work with laps, joints, and seams that will be permanently

watertight and weather resistant.

b) Install exposed flashing and trim that is without excessive oil canning, buckling,

and tool marks and that is true to line and levels indicated, with exposed edges

folded back to form hems. Install sheet metal flashing and trim to fit substrates

and to result in waterproof and weather-resistant performance.

c) Expansion Provisions: Provide for thermal expansion of exposed flashing and trim.

Space movement joints at a maximum of 3m with no joints allowed within

***605mm*** of corner or intersection. Where lapped expansion provisions cannot

be used or would not be sufficiently weather resistant and waterproof, form

expansion joints of intermeshing hooked flanges, not less than ***25mm*** deep,

filled with mastic sealant (concealed within joints).



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

31

3.4 INSTALLATION TOLERANCES

A. Account shall be taken of the installation tolerance requirements of the work.

B. The work shall be erected plumb and true in proper alignment and relation to established

lines and grades as shown on the Shop Drawings. The erected system shall present true

and accurate lines and flat planes. Deviations from lines, planes and verticality shall be

limited to long wave formations of minimum wave length of 20m length with a rate of

exchange not exceeding 1:1000, and a maximum amplitude of 3mm. All the above shall be

measured from an optical or laser reference line.

C. Joints between panels: The actual width of any joint shall not deviate from the nominal width

by more than ±1mm of the joint width, whichever is the lesser. Any variation shall be equally

distributed with no sudden changes. The misalignment between joints shall not exceed 1mm.

D. Shim and align metal-faced composite wall panel units within installed tolerance of

6mm in 6m, non-accumulative, on level, plumb, and location lines as indicated and within

3mm offset of adjoining faces and of alignment of matching profiles.

E. Level: The work shall be within ±2mm of the specified level. The cumulative slope between

the same locations on any panel shall not exceed 1 in 1000.

F. Plumbness: The work shall be erected such that no point on any panel is more than 1mm

from its theoretical vertical plane. The cumulative slope between the same locations on

any panel shall not exceed 1 in 1000. The vertical plane of the work shall be within ±1mm of

the theoretical plan position.

G. A method statement shall be submitted with the Tender detailing proposals for achieving the

specified tolerances. This shall demonstrate that a clear understanding of the

construction programme, the effects of the building structure and construction method and

the fabrication method of the panels is possessed.

H. A detailed list of tolerances to which the work shall be installed, within the

requirements of the Architectural Specification for the overall geometric requirements, shall

be submitted with the Tender. All tolerances shall be submitted for review by the Engineer.

As a minimum, the statement of tolerances shall include the following.

1. Thickness.

2. Position on plan.

3. Level.

4. Alignment.

5. Joints between panels.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

32

6. Diagonal.

7. Eccentricity.

8. Inclination.

I. Allowance for sufficient analysis of the erection sequence shall be made, thus ensuring and

satisfying the Engineer that the installation tolerances stated above shall be met.

J. The dimensional and detailed provisions intended to accommodate the construction

tolerances of surrounding elements in order to ensure that all aspects of the work relate

satisfactorily to the work as a whole shall be stated and shown on the Shop Drawings.

K. All tolerances stated shall be measured and monitored at a mean temperature to be

agreed with the Engineer.

L. A very high degree of accuracy is required in the fabrication and installation of the work

and their support structure.

M. A full understanding of the behaviour of the building structure, its movements and its

effects on the work is required. Full knowledge of the work construction sequence, its

predicted building behaviour during construction and its relationship with the work

construction is also necessary.

N. At the time of handover the visual requirements of the work are as follows.

1. The cladding panels shall be horizontal/ vertical and geometrically shaped as

indicated on the Design Drawings.

2. All joints shall be of equal size and at equal centers, unless indicated otherwise on

the Design Drawings.

3. The work shall present true and accurate straight lines and flat panels within the

plane of the elevations and geometry.

O. Dimensional Checking: Before work begins on Site the proposed method of dimensional

setting-out and crosschecking with adjacent trades and elements, to satisfy the accuracy

requirements, shall be submitted to the Engineer. The checking of any setting-out or of any

line or level by the Engineer, or his representative, shall not in any way relieve the

Contractor of his responsibility for the correctness thereof.

P. Alternative Tolerances: Alternative tolerances to those specified may be permitted at the

Engineer's discretion, provided they are agreed in advance of the manufacture of

components.

Q. The Shop Drawings shall provide for sufficient tolerance in the assembly of the work in



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

33

order to accommodate manufacturing tolerances of other interfacing elements.

R. Work shall be within the tolerances stated herein and no revisions to the tolerances to

cater for inadequate control shall be permitted.

S. Full details shall be submitted to the Engineer for review of the proposed methods for

achieving and constantly monitoring the installation tolerances during all stages of the work.

Detailed records of the constant control and tolerances achieved shall be submitted to the

Engineer.

T. Personnel, equipment and instruments necessary to effectively control tolerances shall be

provided. For recording purposes a reference temperature for measurements shall be

established, preferably the mean value over a period of time.

U. The work, when installed, shall not be subject to warping or twisting, shall be strictly rigid,

firm, free from vibration, knocking, rattles, squeaks and other noises when subject to the

worst combination of environmental conditions and wind loads.

3.5 SITE QUALITY CONTROL

A. Testing Agency: A qualified independent testing and inspecting agency shall be engaged to

perform site tests and inspections and prepare test reports.

B. Remove and replace metal wall panels where tests and inspections indicate that they do

not comply with specified requirements.

C. Wind Resistance Testing

1. Test pressure: The peak test pressure shall be 1.5 times the design wind pressure

(150%) and applied for a minimum of 10 seconds.

2. At both positive and negative applications of the peak test pressure, there shall be no

permanent damage to supports or cladding panels or anchors. Framing members

shall not buckle, panels shall remain securely held and gaskets/ seals shall not be

displaced.

D. Waterproofing and Weathertightness Testing

1. Water-Spray Test: After completing the installation of ***23m*** by-2-story minimum

area of metal wall panel assembly, test assembly for water penetration according to

AAMA 501.2 in a 2-bay area directed by the Engineer.

2. Water Penetration: Test areas of installed system indicated on Drawings for

compliance with system performance requirements in accordance with ASTM E

1105 at minimum differential pressure of 20% of inward-acting, wind-load design

pressure as defined by SEI/ ASCE 7, but not less than 300 Pa.



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

34

3. Test the weathertightness of the work using a suitable testing method as accepted

by the Engineer.

4. Details of the test and a proposed method statement shall be submitted to the

Engineer for acceptance at least one month prior to the proposed testing on Site.

5. All tests shall comply with the rules and standards laid down by the

appropriate testing authorities.

E. Site Tests and Inspections

1. Manufacturer's Site Service:

a) Engage a factory-authorized service representative to inspect and test completed

metal wall panel installation, including accessories.

F. Thermal Performance Testing: Thermography testing shall be carried out to ensure that

insulation is continuous using a suitable thermal imaging method to be proposed by the

Contractor. Testing method to be subject to acceptance by the Engineer.

G. Air Leakage Testing: Air leakage testing shall be undertaken using a suitable method.

H. Testing of Fastenings: As the work proceeds, allow for the bolts to be proof load tested as

required and witnessed by the Structural Engineer.

I. Wall panels shall be considered defective if they do not pass tests and inspections.

J. Additional tests and inspections, at Contractor's expense, will be performed to determine

compliance of replaced or additional work with specified requirements

3.6 CLEANING AND ADJUSTMENT

A. Cleaning: Remove debris and excess materials from Site and dispose of safely. Clean

soiled or stained surfaces in accordance with the manufacturer's instructions. Leave the

work clean and fit for immediate use.

B. Remove temporary protective coverings and strippable films, if any, as wall panels are

installed, until completion, unless otherwise indicated in manufacturer's written installation

instructions. On completion of wall panel installation, clean finished surfaces as

recommended by wall panel manufacturer. Maintain in a clean condition during construction.

C. After wall panel installation, clear weep holes and drainage channels of obstructions, dirt, and

sealant.

D. Replace wall panels that have been damaged or have deteriorated beyond successful repair

by finish touchup or similar minor repair procedures.

3.7 PROTECTION



Telephone: +971 2 653 3333, Fax: +971 2 653 6002

35

A. Provide protection of panels against damage until Taking-Over.

B. Remove protective coverings upon completion, when instructed by the Engineer.

End of Section

SECTION 074200 WALL PANELS - The Future Build · SECTION 074200 WALL PANELS ... temperatures on...

Documents

Transcript of SECTION 074200 WALL PANELS - The Future Build · SECTION 074200 WALL PANELS ... temperatures on...