G3IR-1000-20-SP-9003_R1.PDF

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Client Name : BASF India Limited

Project Name : Project GIR

Project Number: G3IR

Document No. : G3IR–1000–20-SP–9003

Date 21-Aug-12

Page 1 of 17

Metal Siding and Roofing

G3IR–1000–20-SP–9003.doc Architectural

Document No : G3IR–1000–20-SP–9003

Business Unit : General

Discipline : Architectural

Document Type : Specification

Document Title : Metal Siding and Roofing Specification

1 21-Aug-12 Issued for Construction MPD SM VP -

0 08-Aug-12 Issued for Approval MPD SM VP -

VP -A 07-Aug-12 Issued for Review MPD SM

Fluor BASF

Revision Date Purpose Prepared By Checked By Approved By

By Madhulika on Aug 21, 2012 By Sourabh on Aug 21, 2012

ISSUED FOR

CONSTRUCTION22 Aug 2012

VP

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Record of Revisions

This specification has been revised as indicated below and described in the revision record on the following page. Please

destroy all previous revisions.

Revision

No. Date Description

A 07-Aug-12 Issued For Review

0 08-Aug-12 Issued For Approval

1 21-Aug-12 Issued For Construction

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TABLE OF CONTENTS

1.0 GENERAL.....................................................................................................................................................5

1.1 Summary.............................................................................................................................................5

1.1.1. Scope of Specification...........................................................................................................5

1.1.2. Related Specifications ..........................................................................................................5

2.0 CODES AND STANDARDS ........................................................................................................................5

2.1 Indian Standards ................................................................................................................................5

2.2 Other References ................................................................................................................................6

2.3 Government Regulations:..................................................................................................................7

2.4 Submittals............................................................................................................................................7 2.4.1 Certificates............................................................................................................................7

2.4.2 Samples .................................................................................................................................8

2.4.3 Shop Drawings......................................................................................................................8

2.4.4 Design Calculations..............................................................................................................8

2.4.5 Facsimiles of Guarantees .....................................................................................................8

2.4.6 Maintenance Program/Schedule .........................................................................................8

2.4.7 Guarantees ............................................................................................................................9

2.4.8 Design Criteria .....................................................................................................................9

3.0 PRODUCT DELIVERY AND HANDLING...............................................................................................9

4.0 PRODUCTS...................................................................................................................................................9

4.1 Materials..............................................................................................................................................9

4.1.1 Galvanized Metal Gauges....................................................................................................9

4.1.2 Field Assembled Roofing System ......................................................................................10

4.1.3 Field Assembled Wall Panels.............................................................................................14

4.1.4 Non-metallic Fillers or Sealants........................................................................................15

4.1.5 Fasteners .............................................................................................................................15

4.1.6 Sealant .................................................................................................................................15

4.1.7 Metal Flashing and Trim...................................................................................................15

4.1.8 Louvers................................................................................................................................15

4.1.9 Miscellaneous Sheet Metal Items ......................................................................................15

4.1.10 Finishing.......................................................................................................................16

5.0 EXECUTION...............................................................................................................................................16

5.1 Inspection ..........................................................................................................................................16

5.2 Erection .............................................................................................................................................16

5.2.1 General ..............................................................................................................................................16

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5.3 Wall Panels........................................................................................................................................16 5.4 Roof Panels........................................................................................................................................17

5.5 Cleaning.............................................................................................................................................17

6.0 ATTACHMENTS........................................................................................................................................17

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1.0

GENERAL

1.1 Summary

1.1.1. Scope of Specification

This specification includes but does not necessarily limit materials and labor to furnish, unload,

store, and install metal siding and roofing for a complete, operational system.

In case of conflict, following order of precedence shall apply:

PO (Purchase Order)/Contract→ Drawing Details→ Specifications

1.1.2.

Related Specifications

G3IR-1000-20-SP-9001 Architectural Design Criteria

G3IR-1000-20-SP-9002 Pre-engineered Buildings Spec

Coordination of Work prescribed by this specification with Work prescribed by the above listed

specification.

2.0 CODES AND STANDARDS

Applicable part of the following codes, standards and references shall be considered as an integral part of the

specification. The edition in effect on the date of contract award shall be used, except as noted otherwise. In

case where more than one code or standard apply to the same condition, most stringent shall be followed.

2.1 Indian Standards

IS 277 Specification for Galvanized Steel Sheets (Plain and Corrugated)

IS 513 Specification for cold-rolled low carbon steel sheets and strips

IS: 730 (2nd Rev) Hook bolts for corrugated sheet roofing

IS 1200

(PT.IX)

Method of measurements of building and civil engineering works: Part – 9 Roof

covering (including cladding)

IS 1200

(PTX)

Method of measurements of building and civil engineering works:

Part -10 (ceiling and lining)

IS 1230 Cast iron rain water pipes and fitting

IS 1367

(PT -13)

Technical supply conditions for threaded steel fasteners pt.13 hot dip

galvanised coating on threaded fasteners. IS 2633 Method of testing uniformity of coating on Zinc Coated Articles

IS 3069 Glossary of terms, symbols and units relating to thermal insulation materials

IS

12643

Code of Practice for Corrosion Protection of Steel by Fiber glass Reinforced

Polyester Lining.

IS 3144 Methods of test for mineral wool thermal insulation materials

IS 3007

(PT.1)

Code of practice for laying of asbestos cement sheets: part- 1 corrugated sheets

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IS 3007(PT.2) Code of practice for laying of asbestos cement sheets part- 2 semi-corrugated sheets

IS 3346 Method of the determination of thermal conductivity of thermal insulationmaterials.

IS 3384 Specification for bitumen primer for water proofing and damp proofing

IS 4671 Expanded polystyrene for thermal insulation purposes

IS 5382 Specification for rubber sealing rings for gas mains, water mains and

Sewers

IS 7193 Specification for glass fibre base coal tarpitch & bitumen felts

(Amendment I)

IS

14753

Specifications for polymethyl Methacrylate (PMMA) (Acrylic) sheets

IS

14862

Fibre cement flat sheets – specifications

IS

14871

Specifications for products in fibre reinforced cement – Long corrugated or

Asymmetrical section sheets and fittings for roofing and cladding.

IS

13592

Unplasticised polyvinyl chloride (UPVC) pipes for soil and Waste

discharge system for inside and outside building.

IS 8183 Bonded mineral wool

IS 1367 Technical supply conditions for threaded steel fasteners

2.2 Other References

2.2.1 National Building Code of India 2005

2.2.2 CPWD Specifications- Vol. – I- (2009)

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2.2.3 Some requirements in this specification may be modified by Specific requirements in the projector purchase specifications. In case of conflict more stringent requirement shall govern.

2.3 Government Regulations:

2.3.1 Codes and Regulation by State or local agencies that have jurisdiction, where the work is to be

performed, shall apply.

2.4 Submittals

Prior to commencement of work, submittals to the Client/ Client’s representative for review and approval.

2.4.1 Certificates

Submission of the following written manufacturer's /vendors/supplier certifications given below

to the Client/Clients Representative for review & approval.

2.4.1.1 Certification of the materials complying with the specified Indian Standards of IS 277 and

IS: 730 respectively.

2.4.1.2 Materials, their profile and gauge of the wall panels. Their related accessories to be

furnished meeting the specified design criteria.

2.4.1.3 Submission of air and water infiltration test results of the materials by the manufacturer's

/vendor/supplier.

2.4.1.4 Submission of manufacturer's/Vendor’s/Supplier certification as far as practically possible,

so that all components of the roofing system shall be the products of the same

manufacturer/ Vendor/Supplier. The approved roofing manufacturer/ Vendor/Supplier shall give written certification that the roofing system is acceptable and appropriate for

specific use on this project.

2.4.1.5 Certification of the Roofing system approved for the specified design criteria.

2.4.1.6 Certification of the Siding System to be carried by an independent testing laboratory and

meeting the following tests:

2.4.1.6.1 Air Infiltration Test: Tested for static air infiltration in accordance with

ASTM E283-04. End laps not included. Test span of minimum 1500mm.

Maximum air leakage of 0.06 CFM/SQ.FT. at a positive pressure differential

of 1.57 psf.

2.4.1.6.2 Water Penetration Test: No uncontrolled water leakage shall occur to the

room side, when siding system is subjected to a static water infiltration test

per ASTM E 331-00(2009), at a positive pressure differential of 6.24 psf or

20% of the design wind pressure, whichever is greater. Test pressure need not

exceed 12 psf. Test span of minimum 1500mm.

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2.4.1.6.3

Submitting a list of successful jobs completed that are similar or equivalent indesign and magnitude as shown on the architectural drawings and hereinspecified.

2.4.2 Samples

Submitting the following samples to the Client for review or testing by an Independent testinglaboratory as appointed by the client for the same purpose.

2.4.2.1 Panels

One 300x300 mm sample of the panel.

2.4.2.2 Fasteners

Of the type as specified in IS: 1367 and of approved quality and make.

2.4.2.3 Sealant

Product technical data shall be submitted for approval of the approved quality and make.

2.4.3 Shop Drawings

Indication on shop drawings the size and location of openings and the location, length, and

markings of panel pieces to correspond with the sequence of installation and the size and

placement of girts, supports, and braces.

Note- Accessories and the Type and Sequence of field connections. Show types and locations

of fasteners and securement devices. Submissions of 1 copy each of the shop drawings to theArchitect and Client/Clients representative for review.

2.4.4 Design Calculations

Submission of Manufacturer's/Vendor’s/Supplier’s design calculations for wall and roof panels

for review to the Client.

2.4.5 Facsimiles of Guarantees

Submission of all receipts of guarantees to the Client for review.

2.4.6 Maintenance Program/Schedule

Submission of written Maintenance schedule after substantial completion of work, detailed care

and protection of the roofing system. Maintenance schedule shall include all inspection,

maintenance and repair procedures the Client is obligated to perform as per the roofing

guarantees.

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2.4.7

Guarantees

2.4.7.1 Providing Client a 2 year guarantee warranting the weather tightness of the building.

2.4.7.2 Providing Client a 5 year guarantee against oil canning, rattles, and wind whistles.

2.4.7.3 Providing Client with a 10 year guarantee against blistering, peeling, cracking, and flaking,

checkering, chipping, alligatoring, fading, and discoloring.

2.4.7.4 Providing Client a 10 year guarantee against storm damage from wind forces within the

specified design criteria.

2.4.8 Design Criteria

2.4.8.1 Design Code: IS 277

2.4.8.2 Deflection: (Normally L/150)

2.4.8.3 Wind Load: IS 875- Part 3

2.4.8.4 Girt Spacing- 2200 mm-2600 mm

2.4.8.5 Seismic Design: IS 1893

3.0 PRODUCT DELIVERY AND HANDLING

Delivering panels to the job site properly skidded and bundled to prevent rack and twist. Provide protection

against edge and end damage, water staining, and any surface damage. Bundles and accessory pieces properly marked for erection in sequence on the location. Damaged materials are to be marked and

immediately removed from the jobsite.

STORE all siding material off the earth sloped for drainage of condensation, and in original packaging until

used. Avoid excessive handling of materials that may cause damage to finish or shape.

4.0 PRODUCTS

4.1 Materials

4.1.1 Galvanized Metal Gauges

Gauges of exterior galvanized metal wall panels, roof panels, and accessories shall be as

required to meet specified design criteria.

4.1.1.1 Technical Specification – Galvalume

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Approved quality profiled, precoated, steel sheets (for roofing, cladding etc.) made fromcold rolled high tensile Galvalume steel of 550 MPA yield stress confirming to IS:14246and ASTM AS: 1397: the substrate shall be hot dip metallic coating of aluminum-zinc

alloy(150 grams per square mtr. Total on both sides, coating class AZ150): the bottom

unexposed surface shall be provided with alkyd backer of minimum 7 microns; exposed surface shall have SMP (silicon Modified Polyester) paint system minimum 20 microns in

approved shade applied over 5 microns primer: overall coated thickness of sheets shall not

less than 0.5mm, profile depth not less than 28mm and pitch not more than 190mm:

Laying in position roofing and cladding accessories like ridge piece, corner piece, north

light curve piece, apron piece, gutter, flashing etc. Fabricated out of 0.5mm pre coated Galvalume Steel sheets of same material/ quality etc. As that of sheeting: bent and profiled

to match with the roofing and cladding, including cutting, fabrication, riveting, mitering,

laps, providing cutouts for fixing accessories, necessary fasteners (approved quality anti

corrosive polyester polymer coated rivets, nuts, bolts, self-drilling screws/fasteners with

integral washers and EPDM seals, and nylon color caps and natural cure type joint sealantsetc.) All complete as per approved manufacturer’s specifications.

4.1.1.2 The sheets shall be free from cracks, split edges, twists, surface flaws etc. They shall be

clean, bright and smooth.

4.1.1.3 The galvanising shall be non-injured and in perfect condition. The sheets shall not showsigns of rust or white powdery deposits on the surface.

4.1.1.4 The corrugations shall be uniform in depth and pitch and parallel with the side.

4.1.2 Field Assembled Roofing System

The following metal roofing panel system, accessories and materials are as manufactured or

supplied by the Client approved manufacturer/Vendor/Supplier or an approved substitute in

its place.

4.1.2.1 Roof Panel

Metal Cladding (sloped roofs) shall have a minimum thickness of 0.50 mm thick. The

profile shall have a minimum corrugation depth of 28 mm. Pre-painted coating shall be

chemically resistant to process and environmental oxidizing agents. Attachments/ fasteners

will be SS304 austenitic stainless steel. Supporting steel deck shall have a minimumthickness of 1.5 mm with corrugation of 28 mm or 66 mm depending on structural load

factors and supporting steel spacing.

4.1.2.2 Slope of the Roofing System

Roof shall not be pitched at a flatter slope than 10 Degree.

4.1.2.3 Laying and Fixing of The Roofing System

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The laying operation shall include all Scaffolding work involved.

4.1.2.3.1 The Sheets shall be laid and fixed in the manner described below, unless

otherwise shown in the Working Drawings or directed by the Engineer-in-Charge.

4.1.2.6.2 The Sheets shall be laid on the purlins to a true plane, with the lines of

corrugations parallel or normal to the sides of the area to be covered unless

otherwise required as in special shaped roofs.

4.1.2.3.3 The Sheets shall be laid with a Minimum Lap of 150mm at the ends and 2ridges of corrugations at each side. The above minimum end lap of 1500mm

shall apply to slopes of 1:2 and for steeper slopes. For flatter slopes the

minimum permissible end lap shall be 200mm. The minimum lap of-

Sheets with ridge, hip and valley shall be 200mm measured at right angles to

the line of the ridge, hip and valley respectively. These sheets shall be cut tosuit the dimensions or shapes of the roof, either along their length or their

width or in a slant across their lines of corrugations at hips and valleys. They

shall be cut carefully with a straight edge chisel to give a smooth and straight

finish.

4.1.2.3.4 Lapping in C.G.S. sheets shall be painted with a coat of approved Steel primer

and 2 coats of painting with approved paint suitable for G.S. sheet, before thesheets are fixed in place.

4.1.2.3.5 Sheets shall not generally be fixed into Gables and Parapets. They shall be

bent up along their side edges close to the wall and the junction shall be

protected by suitable flashing or by a projecting drip course, the later to cover the junction by at least 75mm.

4.1.2.3.6 Sheets shall be fixed to the Purlins or other Roof Members such as Hip or Valley Rafters etc. with galvanised J or L hook bolts and nuts, 8 mm diameter,

with bitumen and G.I. limpet washers or with a limpet washer filled with

white lead as directed by the Engineer-in-Charge or as per Shop Drawings.While J hooks are used for fixing sheets on angle iron purlins, and L hooks are

used for fixing the sheet to R.S. joists, timber or precast concrete purlins. The

length of the hook bolt shall be varied to suit the particular requirements. The

bolts shall be sufficiently long so that after fixing they project above the top of

the nuts by not less than 10 mm. The grip of J or L hook bolt on the side of the purlin shall not be less than 25 mm. There shall be a minimum of 3 hook bolts

placed at the ridges of corrugations in each sheet on every purlin and their spacing shall not exceed 300mm. Coach Screws shall not be used for fixing

sheets to purlins.The galvanised coating on J or L hooks, and bolts shall be continuous and free

from defects such as blisters, flux stains, drops, excessive projections or other

imperfections which would impair serviceability. The galvanised coatingshould conform to IS 1367 (Pt. XIII).

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4.1.2.3.6

Where slopes of roofs are less than 21.5 degrees (1 vertical to 2.5 horizontal)sheets shall be joined together at the side laps by galvanised iron bolts and nuts 25 × 6 mm size, each bolt provided with a bitumen and a G.I. limpet

washer or a G.I. limpet washer filled with white lead. As the overlap at the

sides extends to two corrugations, these bolts shall be placed zig-zag over thetwo overlapping corrugations, so that the ends of the overlapping sheets shall

be drawn tightly to each other. The spacing of these seam bolts shall not

exceed 60 cm along each of the staggered rows. Holes for all bolts shall be

drilled and not punched in the ridges of the corrugations from the underside,

while the sheets are on the ground.

4.1.2.4 Wind Tie

Wind ties shall be of 40 x 6 mm flat iron section or of other size as specified. These shall befixed at the eaves of the sheets. The fixing shall be done with the same hook bolts which

secure the sheets to the purlins. The ties shall be paid for separately unless described in the

item of roofing.

4.1.2.5 Finishing

The roof when completed shall be true to lines, and slopes and shall be leak proof asappropriate coating done as per IS 3384.

4.1.2.6 Fixing and Laying of Ridges and Hips

4.1.2.6.1 Ridges and hips of C.G.S. roof shall be covered with ridge and hip sections of

plain G.S. sheet with a minimum lap of 200mm on either side over the C.G.S.sheets. The end laps of the ridges and hips and between ridges and hips shall

also be not less than 200mm. The ridges and hips shall be of 600mm overall

width plain G.S. sheet, 0.6 mm or 0.8 mm thick as given in the description of

the item and shall be properly bent in shape.

4.1.2.6.2 Ridges shall be fixed to the purlins below with the same 8 mm dia G.I. hook bolts and nuts and bitumen and G.I. limpet washers which fix the sheets to the

purlins.

4.1.2.6.3 Hips shall be fixed to the roof members below such as purlins, hip and valley

rafters with the same 8 mm dia. G.I. hook bolts and nuts and bitumen and G.I.limpet washers which fix the sheets to those roof members. At least one of the

fixing bolts shall pass through the end laps of ridges and hips, on either side.If this is not possible extra hook bolts shall be provided .

4.1.2.6.4 The End Laps of ridges and hips shall be joined together with C.G.S sheet bygalvanised iron seam bolts 25 x 6 mm size each with a bitumen and G.I.

washer or white lead as directed by the Engineer-in-Charge. There shall be at

least two such bolts in each end lap.

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4.1.2.6.5 Surface of C.G.I. sheets of ridge and hip sections and the roofing sheets whichoverlap each other shall be painted with a coat of approved primer and two

coats of approved paint suitable for painting G.S. Sheets before they are fixed

in place.

4.1.2.6.6 The edges of the ridges and hips shall be straight from end to end and their

surfaces should be plane and parallel to the general plane of the roof. The

ridges and hips shall fit in squarely on the sheets.

4.1.2.7 Fixing and Laying of Ridges and Hips

4.1.2.7.1 Valley shall be 90 cm wide overall plain G.S. sheet 1.6 mm thick or other sizeas specified in the item bent to shape and fixed. They shall lap with the C.G.S.

sheets not less than 25 cm width on other side. The end laps of valley shall

also be not less than 25 cm. Valley sheets shall be laid over 25 mm thick wooden boarding if so required.

4.1.2.7.2 Flashing shall be of plain G.S. sheet of 40 cm overall width 1.25 mm thick or

1.00 mm thick as specified in the item bend to shape and fixed. They shall lapnot less than 15 cm over the roofing sheets. The end laps between flashing

pieces shall not be less than 25 cm.

4.1.2.7.3 Flashing and Valley sheets shall be fixed to the roof members below, such as purlins and valley rafters with the same 8 mm dia G.I. hook bolts and nuts and

bitumen and G.I. limpet washers which fix the sheets to those roof members.

4.1.2.7.4 One of the fixing bolts shall pass through the end laps of the valley pieces on

other side. If this is not possible extra hook bolts shall be provided. The free

end of flashing shall be fixed at least 500mm inside masonry with the mortar

of mix 1: 3 (1 cement: 3 coarse sand).

4.1.2.7.5 Surface of G.S. sheets under overlaps shall be painted with a coat of approved

primer and 2 coats of approved paint suitable for painting G.S. sheets.

4.1.2.7.6 The edges of valley and flashing should be straight from end to end. The

surfaces should be true and without bulges and depressions.

4.1.2.8 Fixing and Laying of Gutters

4.1.2.8.1 Gutter shall be supported on and fixed to M.S. flat iron brackets bent to shapeand fixed to the requisite slope. The maximum spacing of brackets shall be

1200mm.

4.1.2.8.2 Where these brackets are to be fixed to the sides of rafters, they shall be of 40

× 3 mm section bend to shape and fixed rigidly to the sides of rafters with 3

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Nos. 10 mm dia. bolts, nuts and washers. The brackets shall overlap the rafter not less than 300mm and the connecting bolts shall be at 120mm centers.

4.1.2.8.3 Where the brackets are to be fixed to the purlins, the brackets shall consist of

50 × 3 mm M.S.flat iron bent to shape with one end turned at right angle and fixed to the purlin face with 2 Nos. of 10mm dia bolts nuts and washers. The

bracket will be stiffened by provision of 50 × 3 mm. M.S. flat whose over

hung portion bent to right angle shape with its longer leg connected to the

bracket with 2 Nos. 6mm dia M.S. bolts, nuts and washers and its shorter leg

fixed to face of purlin with 1 No. 10 mm dia., bolt, nut and washer. The over hang of the vertical portion of the bracket from the face of the purlin shall not

exceed 225mm with this arrangement. The spacing of the brackets shall not

exceed 1200mm.

4.1.2.8.4 The Gutter shall be fixed to the brackets with 2 Nos. G.I. bolts and nuts 6 mmdia, each fitted with a pair of G.I. and bitumen washers. The connecting bolts

shall be above the water line of the gutters.

4.1.2.8.5 For Connection to Down Take Pipes, a proper drop end or funnel shaped

connecting piece shall be made out of G.S. sheet of the same thickness as the

gutter and riveted to the gutter, the other end tailing into the socket of the rain-water pipe. Wherever necessary stop ends, angles etc. should be provided.

4.1.2.8.6 The gutters when fixed shall be true to line and slope and shall be leak proof.

4.1.3 Field Assembled Wall Panels

The following metal wall panel system, accessories and materials are as manufactured or

supplied by the Client approved manufacturer/Vendor/Supplier or an equivalent approved

substitute in its place.

4.1.3.1 Exterior Face Sheet

Metal siding (Walls) shall have a minimum thickness of 0.50 mm thick (of Grade 50 or 55-Class 1 or 2). The profile shall have a minimum corrugation depth of 38 mm. Pre-painted

coating shall be chemically resistant to process and environmental oxidizing agents.

Attachments/ fasteners will be SS304 austenitic stainless steel and shall be as per

Vendor’s/Supplier’s standard self-drilling stainless screws with sealing washer. Interior

cladding for insulated composite wall assemblies (liner sheets) shall be a pre-painted liner sheet with a minimum thickness of 0.65mm with sealed joints and shall be used as a vapor

barrier.

4.1.3.2 Insulation

Fiber glass Reinforced Polyester Lining for insulation as per IS 12643 of the IndianStandard.

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4.1.4

Non-metallic Fillers or Sealants.

Molded to same profile as siding from closed cell PVC, neoprene, rubber, or other suitable

materials.

4.1.5 Fasteners

4.1.5.1 Wall Panel Fasteners

Concealed where design permits, otherwise, use self-tapping stainless steel screws. Provide

exposed fasteners with sealing washers or gaskets with heads of same color as siding.

4.1.5.2 Roof Panel Fasteners

Provision of self-tapping (as recommended by the manufacturer/Vendor/Supplier) stainless

steel self drilling screws screws with weather sealed washers or gaskets for sealing and

flashing at terminal locations and at the swaged end lap of roof panel.

4.1.6 Sealant

One or 2 component polyurethane or polyethylene or as recommended by

Manufacturer/Vendor/Supplier.

4.1.7 Metal Flashing and Trim

Provide necessary metal flashing, closures, and trim around openings and penetrations through

metal siding or as required to provide a waterproof system. Provide flashing and trim of same

material and gauge as exterior face sheet. Trim openings on the exterior and interior of the

building.

4.1.8 Louvers

As per Architectural and Building utilities design criteria document – G3IR-1000-20-SP-9001.

4.1.9 Miscellaneous Sheet Metal Items

Provide fascia, gutters, downspouts, cleats, and cradles of galvanized steel conforming to IS

277.

4.1.9.1 25 gauge for fascia.

4.1.9.2 20 gauge for gutters. Provide cradles of minimum 3mm x by 25mm cold-rolled galvanized

steel bands.

4.1.9.3 20 gauge for downspouts.

4.1.9.4 20 gauge for cleats.

4.1.9.5 24 gauge for reveal.

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4.1.9.6

24 gauge for cap flashing.

4.1.10 Finishing

Coating exterior surfaces of wall panels, flashing, liner panel (where exposed to the exterior)

and miscellaneous trim system as per IS 3069.

4.1.10.1 Interior finish shall be provided with thermal insulation coating of any colour other then

light or white colour .

5.0 EXECUTION

5.1 Inspection

Inspection of the following areas for the items used on them as listed in this specification. Reportingunsatisfactory conditions, in writing, to the Client.

5.2 Erection

5.2.1 General

5.2.1.1 Accurately framed work to required sizes, shapes, and dimensions with angles and lines intrue alignment. Erect work plumb, level, and in proper plane without bulges or waves.

Formed and accurately joined miters. Drive screws straight and to full depth to form

weather tight seal with required gaskets and sealants.

5.2.1.2 Protection of roof and wall panel surfaces in contact with cementitious materials and

dissimilar metals with bituminous paint. Allow protective coating to dry before installingmembers.

5.2.1.3 Permanent fastening of roof and wall panels to structural supports, properly aligned,

leveled, and plumbed. Maximum offset from true alignment between adjacent members butting or in line shall be 1.6mm. Maximum variation from plane or location indicated on

drawings shall be 3.2mm.

5.2.1.4 Provision for thermal movement.

5.2.1.5 Installing insulation evenly without, sags, voids, deformation, or damage to facings.

5.3 Wall Panels

Erection of metal wall panels in accordance with - Mfg /Vendor/Supplier’s reviewed shop drawings.Examine the alignment of structural steel before erecting metal panels. Not to proceed with erection if steel is

not aligned to the tolerances set up by Indian Standards. Accurately positioned panels on supporting

framework and adjusting to final position with proper bearing before securing. Erecting panels with end laps

over girts, horizontal lines straight, and level with vertical lines plumb.

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Date 21-Aug-12

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5.3.1

Exercising care in drilling and cutting. Remove metal filings, drill shavings, and burrs fromadjacent surfaces prior to panel erection. Field caulk metal flashing trim, and elsewhere asrequired for a weatherproof installation.

5.3.2 Install subsills, sills, parapet caps, and other trim pieces as detailed and in accordance with

manufacturer's recommendations.

5.4 Roof Panels

5.4.1 Installing panels in a continuous length from eave to eave and installing the same in the inverted position.

5.5 Cleaning

After erection, touching up marred, scratched, or otherwise defaced factory finished and shop-primed surfacesinstalled under this specification with the matching finish and paint if required. Repaired surfaces not

acceptable to the Client shall be replaced without additional costs.

6.0 ATTACHMENTS

Not applicable.

End of Specification

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Documents

G3IR-1000-20-SP-9003_R1.PDF