08-08900- 3 Exterior Glaz.doc

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ABU DHABI NATIONAL OIL COMPANY (ADNOC)

RUWAIS HOUSING COMPLEX EXPANSION PHASE III

CONSTRUCTION OF NEW HOSPITAL - PHASE 1&2

PROJECT No. 5980

TENDER ENQUIRY No. 115980C1

VOL 5-DIV: 8 DOORS & WINDOWS SEC: 08900

REV: 00 1 of 11

08900

EXTERIOR GLAZED CURTAINWALL SYSTEM

Contents

PART 1 GENERAL........................................................................................................................2

1.1 DESCRIPTION OF WORK ...............................................................................................2

1.2 QUALITY CONTROL.......................................................................................................2

1.3 SUBMITTAL......................................................................................................................6

1.4 WARRANTEES AND GUARANTEES............................................................................7

PART 2 PRODUCTS .....................................................................................................................72.1 MATERIALS......................................................................................................................7

2.2 FABRICATION / MANUFACTURE................................................................................9

PART 3 EXECUTION ...................................................................................................................9

3.1 INSPECTION .....................................................................................................................9

3.2 INSTALLATION/APPLICATION/PERFORMANCE/ERECTION.................................9

3.3 FIELD QUALITY CONTROL.........................................................................................10

3.4 ADJUSTMENT AND CLEARANCE..............................................................................10






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PART 1 GENERAL

1.1 DESCRIPTION OF WORK

A. General

This Section covers the detailed design, fabrication and installation of the curtain wall

system located on the exterior walls as detailed on the Drawings.

1. Provide all fastenings accessory features, all connections to the building

structure and other items not mentioned specifically herein, but which are

necessary to make a complete installation.

2. Primary components of the glazed curtain wall system include but are not

limited to the following:

a. Extruded aluminum curtain wall framing system, with thermal break

units, designed as a thermal isolator.

b. Internal reinforcements.

c. Architectural metal panels.

d. Doors and frames, where indicated.

e. Trim, covers, flashing (which are provided by the curtain wall

manufacturer), soffits, copings, and similar border and filler items.

f.

Anchors, shims, fasteners, inserts and accessories.g. Glazing, setting blocks, concealed flashing, joint fillers, sealant, gaskets

and glass.

h. Insulation and fire stopping within the curtain wall system as required

by manufacturer.

i. Stainless steel mullion caps in specified finish. Refer to 2.1.A.4.

B. Related Work Specified Elsewhere:

1. Glass and glazing materials shall be as specified in section 08800 - GLASS &

GLAZING.

2. Structural steel work shall be as specified in section 05100 - STRUCTURAL

STEEL.

3. Sealants as specified in section 07900 - CAULKING AND SEALANTS.

1.2 QUALITY CONTROL

A. Standards

The publications listed below form a part of this Specification to the extent referenced.

The publications are referred to in the text by basic designation only.






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ALUMINIUM ASSOCIATION (AA)

Guide Specification Designation System for Aluminum Finishes

AMERICAN ARCHITECTURAL MANUFACTURERS ASSOCIATION (AAMA)

AAMA 101 Specifications for Aluminum Prime Windows and

Sliding Glass Doors

AAMA 501.3 Methods of Tests for metal curtain walls

AAMA 1503.2 Test method for condensation resistance of windows,

doors and glazed wall sections

(this is a separate test in addition to typical testing.This is normally conducted on standard products)

AAMA TIR-A2 Design wind loads for aluminum curtain walls

AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

ASTM A 167 Specification for stainless and heat resisting chromium

nickel steel plate, sheet and strip

ASTM A 666 Specification for Austenitic Stainless Steel, sheet, strip,

plate and flat bar

ASTM B 209 Specification for Aluminum and Aluminum-Alloy

Sheet and PlateASTM B 221 Specification for aluminum-alloy extruded bars, rods,

wire, shapes, and tubes (Metric)

ASTM C 509 Specification for cellular elastomeric preformed gasket

and sealing material

ASTM E 283 Determining the rate of air leakage through exterior

windows, curtain walls, and doors under specified

pressure differences across the specime

ASTM E330 Structural Performance

ASTM E 331 Test method for water penetration of exterior windows,

curtain walls, and doors by uniform static air pressure

difference

ASTM E 783 Test method for field measurement of air leakage

through installed exterior windows and doors.

ASTM E 1105 Test method for field determination of water

penetration of installed exterior windows, curtain walls

and doors by uniform cyclic static air pressure

difference.

FLAT GLASS MARKETING ASSOCIATION (FGMA)

Glazing Manual






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Sealant Manual

B. Design Criteria:

1. Structural properties.

a. The wall shall be designed, engineered, fabricated and installed to

withstand inward and outward pressures in accordance with "Minimum

Design Loads in Buildings and Other Structures" ANSI/ASCE 7-88

formerly known as ANSI A58.1 and as recommended by AAMA TIR-

A2, "Design Wind Loads for Aluminum Curtain walls".

b. The exterior walls shall be designed to withstand both the inward

pressure acting inward and the outward pressure acting outward, the two

pressures being applied separately.

c. Copies of structural calculations made by or for this Contractor in

connection with the supplementary design and/or detailing of the Work

herein specified shall be furnished to the COMPANY. These

calculations shall be stamped and signed by a professional engineer

registered in the Country of manufacture.

d. The deflection of any metal framing member, in a direction normal to

the plane of the wall shall not exceed 1/175 of the clear span of the

member or 10mm, whichever is least, except that when a finished

surface is affected this deflection shall be not more than 1/360 of the

clear span.

e. The deflection of any member, in a direction parallel to the wall plane,

when the member carries its full design load, shall not exceed 75

percent of the design clearance dimension between that member and the

panel, sash, glass or other part adjacent to it.

f. Structural strength : The system is to capable of carrying

the vertical loads safely to the steel

structure at each floor level.

The system is to be able to withstand

forces from the wind as defined in the

wind tunnel test , or a minimum of 1.2

kN/m² applied as a suction or pressure.

For the purposes of pricing only:

The following loads shall be

considered for design purposes:

• In areas local to corners adjacent to

existing towers extending

- 4.5 kN/m².

• In areas local to all other corners,

extending 5m back from corner

- 2.5 kN/m²

Otherwise - 1.75 kN/m²






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2. Water infiltration.

a. Provision shall be made in the design to drain to the exterior face of the

wall, any leakage of water occurring at joints and/or any condensation

taking place within the construction with no damage to the wall,

adjacent construction or finishes.

b. Resistance to water infiltration. No water infiltration shall occur when

the wall is tested (or has been previously tested by a nationally

recognized testing laboratory) as follows: under a static pressure of 600

Pascal, 203 liters per hour per square meter shall be applied to the

exterior face of the unit for a period of 1/4 hour in accordance with

ASTM E-331-86. No uncontrolled water shall pass the interior face of

the unit.

3. Resistance to air infiltration. Air infiltration through the wall, when tested by a

nationally recognized testing laboratory, shall not exceed 18290 cubic

centimeters -per min. per square meter of fixed wall area equivalent to

1.09m³/hr/m² @ 75 Pa.

4. Condensation resistance for the aluminum framing shall not be less than 51 CRF

per AAMA 1503.2.

5. Dissimilar metals shall be isolated to prevent staining or galvanic corrosion.

6. Base design of curtainwall system on the rain screen principle as described in

volume 2 of the Aluminum Curtainwall Design Guide Manual, latest addition,

published by Architectural Aluminum Manufacturer’s Association (AAMA).

7. Provisions to ensure complete floor-to-floor fire and air barrier separation

between curtainwall and perimeter of structure.

C. Source Quality Control:

1. Entire curtain wall installation, including all fastenings and anchors shall be

done by or under the direction of a single manufacturer.

D. Installer Qualifications:

1. Engage an experienced installer who has successfully completed installation of

entrance, window, curtain wall and storefront systems similar in material,

design, and extent to that indicated for the project for a period of not less than 5years.

E. Glazing Standards:

1. Comply with recommendations of Flat Glass Marketing Association (FGMA)

"Glazing Manual" and "Sealant Manual" except where more stringent

requirements are indicated. Refer to those publications for definitions of glass

and glazing terms not otherwise defined in this Section or referenced standards.

F. Pre installation Meeting:






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1. Before beginning installation, conduct a pre installation meeting at the project

Site with the system manufacturer, installer and other interest parties to review

procedures, schedules and coordination of the installation with other elements of

the Work.

G. Field Measurements

1. The Contractor shall check and guarantee openings for the curtain wall to the

installer for this Section by field measurement before fabrication to ensure

proper fitting of Work of this Section. Show measurements on final shop

drawings. Coordinate fabrication schedule with construction progress to avoid

delay in the Work and coordinate fabrication tolerances to ensure proper fit. In

order to expedite final engineering drawings and permit glass to be ordered, the

Contractor may elect to guarantee openings by means of a written release to thecurtain wall manufacturer to start the fabrication process and eliminate field

dimensions.

1.3 SUBMITTAL

A. Submit the following in accordance with Division 01340.

1. Certificate of Compliance:

a. Submit manufacturer's certificate stating compliance of the curtain wall

with performance requirements specified herein.

2. Product Data:

a. Submit manufacturer's general product description and installation

recommendations for the curtain wall required for this Project.

3. Shop Drawings:

a. Submit shop drawings for fabrication and installation of curtain wall

which shall include elevations, interfaces with building construction,

details of sections and condition, anchorage, steel reinforcement,

expansion provisions, flashing, glazing details and drainage methods.

b. All details shall be cross-referenced to elevations, or large scale

drawings.

4. Qualifications:

a. Submit certification signed by the curtain wall manufacturer that the

installer of the curtain wall system is capable of executing the

installation in accordance with the shop drawings and installation

instructions. Preference will be given to manufacturer’s that are ISO

9001 registered.

5. Samples:

a. Submit two (2) samples of each specified finish on 300mm long

sections of a representative member. Where finishes involve normal

colour variations, include sample sets showing the full range of






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variations expected. Samples to be labeled with location description and

project name.

b. Submit 1 meter x 1 meter complete assembled sample with approved

colors.

6. Test Reports:

a. Submit copies of the test reports resulting from the requirements

specified in the Quality Control criteria for the design and installation.

1.4 WARRANTEES AND GUARANTEES

A.

Before final payment is made, the Contractor shall warrant to the COMPANY in writingthat all parts of the Work will meet the specified overall performance requirements and

will be free from defects in materials and workmanship for a period of ten (10) years

following the date of issue of the Substantial Completion Certificate. He shall certify in

writing also that all Work is in accordance with the Contract Documents and authorized

alterations and/or additions thereto and that, should any defect develop during the

warranty period due to improper workmanship or materials under his jurisdiction, such

defects shall, upon written request, be repaired or replaced by the Contractor at his own

expense.

B. The warranty shall not deprive the COMPANY of other rights or remedies that the

COMPANY may have under other provisions of the Contract Documents and is in

addition to and runs concurrent with other warranties made by the Contractor underrequirements of the Contract Documents.

C. Curtain wall failures include but are not limited to the following:

1. Structural failures including excessive deflection, excessive leakage, or air

infiltration.

2. Deterioration of metals, metal finishes, and other materials beyond normal

weathering.

3. Failure in glass and glazing within curtain wall framed units.

PART 2 PRODUCTS

2.1 MATERIALS

A. Curtain wall shall be standard units with a silicone compatible elastomeric thermal

barrier manufactured by a firm that specializes in the design and manufacture of the type

of curtain wall system specified in this Section. Framing intersection to incorporate

silicon compatible “zone dams”. All horizontal-glazing pockets will provide weep holes

to drain all accumulated water to exterior. The aluminum curtainwall will be designed

on the “rain screen” principle of pressure equalization. The firm shall have a minimum

of 20 (twenty) years of documented successful experience. Manufacturer shall have






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production facilities capable of meeting the requirements of the Contract Documents and

shall be able to provide single-source-responsibility and the warranty specified herein.

1. Grid members and perimeter framing at bottom level and with Roofs shall be

extruded aluminum designed to meet the required wind load. Grid members

shall have the dimensions shown on the drawings or satisfy the design loads in

fit, form and function

2. Glazing gaskets shall be heavy extruded neoprene or EPDM as recommended

by the manufacturer. .

3. All fittings, nuts, bolts, expanding bolts, shims, shall be stainless steel type

316L.

4. Stainless steel for exterior caps, type 316L, shall comply with requirements of the following.

a. Sheet, strip, plate and flat bars: ASTM A 666.

b. Plate. sheet and strip: ASTM A 167.

c. Exposed/visible stainless steel shall have No. 4 satin finish.

5. Aluminum of alloy, temper and thickness as recommended by the manufacturer

for type and use indicated shall comply with requirements of the following.

a. Extruded bar and shapes: ASTM B 221.

b. Plate and sheet: ASTM B 209.

c.

Extrusions – 6063 - T5B. Organic Coating for all interior mullion surfaces– Thermosetting fluropolymer

containing Kynar 500. (70% by volume weight)in accordance with AAMA 2605.

Colour shall be white RAL 9010 from the standard range of the manufacturer.

C. Anodized finish shall be in accordance with AAMA AA-M12C22A44 with a minimum

coating of 18 microns. (when specified on drawings)

D. Fasteners and Accessories: Provide manufacturer's standard 316L series stainless steel

or aluminium noncorrosive fasteners and accessories compatible with materials used in

the framing system and with exposed portions that match finish of the system. Where

movement is expected, provide slip-joint linings of sheets, pads, shims, or washers of

fluorocarbon resin or a similar material recommended by the manufacturer.

1. Where fasteners anchor into aluminum less than 3.175 mm thick, provide

noncorrosive pressed-in splined grommet nuts or other type reinforcement to

receive fastener threads.

2. Exposed Fasteners. Do not use exposed fasteners except where unavoidable for

application of hardware. For application of hardware use fasteners that match

the finish of the member of hardware being fastened as appropriate.

3. Provide flat-head machine screws for exposed fasteners.

E. Concealed Flashing: Provide 0.70 mm thick minimum dead-soft stainless steel flashing.






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F. Brackets and Reinforcements: Provide high strength stainless steel brackets and

reinforcements as and when indindicated on drawings.

G. Concrete/Masonry Inserts: Provide concrete and masonry inserts fabricated from

stainless steel 316L.

H. Compression-Type Weather-stripping: Provide compressible molded expanded

Santoprene, EPDM or neoprene weather-stripping gaskets complying with ASTM C

509.

I. Anchors and embeds: Anchors and embeds shall be made from mild steel (ASTM A 36)

finished with zinc chromate paint. The embeds shall be cast into the concrete as

indicated by the curtainwall manufacturer.

2.2 FABRICATION / MANUFACTURE

A. Curtain wall.

1. Provide shop fabricated curtain wall system for site assembly and installation.

All components shall be fabricated to comply with indicated standards specified

herein.

2. Curtain walls shall be designed with sufficient weep hole area to allow quick

drainage from any water penetration that might occur. Weep hole size to be

9.5mm minimum.3. Thermal barrier shall be an extruded silicone compatible elastomer separator or

similar performing product as recommended by the specialist and approved by

the COMPANY.

PART 3 EXECUTION

3.1 INSPECTION

A. Inspect openings before beginning installation. Verify that rough or masonry opening is

correct and the sill plate is level.

B. Masonry surfaces shall be visibly dry and free of excess mortar, sand and other

construction debris.

C. Metal surfaces shall be dry, clean, free of grease, oil, dirt, rust and corrosion, and

welding slag, and without sharp edges or offsets at joints.

3.2 INSTALLATION/APPLICATION/PERFORMANCE/ERECTION

A. Installation shall be in strict accordance with the metal curtain wall manufacturer's

specifications.






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1. Anchor components securely in place in the manner indicated. Provide

separators and isolators to prevent corrosion, electrolytic deterioration, and

freeze-up of moving joints.

2. Set units plumb, level, and true to line, without warp or rack of frames or sash.

Provide proper support and anchor securely in place. Do not bridge thermal

breaks.

3. Separate aluminum and other corrodible surfaces from sources of corrosion or

electrolytic action at points of contact with other materials by complying with

the requirements specified under paragraph "Dissimilar Materials" in the

Appendix to AAMA 101.

4. Set sill members and other members in a bed of compound or with joint fillers

or gaskets, as shown, to provide weathertight construction. Refer to Section07900, CAULKING AND SEALANTS for compounds, fillers and gaskets to be

installed concurrently with window units. Coordinate installation with wall

flashing and other components of the Work.

B. Overall performance requirements.

1. Provisions for thermal movements. The wall shall be so detailed as to provide

for such expansion and/or contraction of the component materials as will be

caused by an ambient temperature range of 49°C. without causing harmful

buckling, opening of joints, undue stress on fasteners, or other detrimental

effects.

3.3 FIELD QUALITY CONTROL

A. Conduct two separate on-site tests for air and water infiltration with the manufacturer's

representative present. Units not meeting specified requirements and other units having

similar deficiencies shall be corrected and re-tested at no cost to the COMPANY.

Testing shall be performed by an accredited testing agency in accordance with

procedures specified in AAMA 501.3.

1. Air Infiltration Tests. Conduct tests in accordance with ASTM E 783. Allowable

infiltration per square foot of curtain wall area shall not exceed the amountspecified herein (Paragraph 1.2A.3.)

2. Water Resistance Tests: Conduct tests in accordance with ASTM E 1105. No

water penetration as defined in Paragraph l.2A.2. shall be permitted.

3. Costs for all tests shall be paid for by the system manufacturer.

3.4 ADJUSTMENT AND CLEARANCE

A. Cleaning






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1. Clean surfaces promptly after installation. Exercise care to avoid damage to

protective coatings and finishes.

2. Remove excess glazing and sealant compounds, dirt, and other substances.

Lubricate hardware and other moving parts.

B. Breakage And Protection

1. Replace units broken or damaged in the process of the Work. Curtain wall

Installer shall be relieved of responsibility of breakage or damage after units are

installed and will not be required to replace units at his expense unless breakage

or damage was caused by poor or faulty workmanship or materials. Broken or

damaged units shall be replaced at the expense of the party causing damage as

determined by the Contractor. If no responsibility for damage can bedetermined, the Contractor shall pay for all replacement costs.

2. Contractor shall initiate and maintain protection and other precautions required

through the remainder of the construction period to ensure that, except for

normal weathering, units will be free of damage or deterioration at the date of

the Provisional Acceptance Certificate.

C. Maintenance Instructions

1. A representative of the curtain wall manufacturer shall coordinate with the

Contractor and meet with the COMPANY’s maintenance staff so as to provide

sufficient instructions for maintenance and up-keep of the curtain wall

installation.

2. Provide maintenance procedure in accordance with the conditions of the

contract.