REFURBISHMENT OF ROOFING FOR ATHLETIC STADIUM SPECTATORS GALLERY

PART A - Civil Work

Removing G.I. or A.C. sheet roofing including purlins, principal rafters etc. including sorting serviceable and unserviceable materials, stacking the same as and where directed in the compound including scaffolding etc. complete. Spec. No.:- As directed by Engineer in charge.

Supply and Installation of concealed fix non screwing type (Standing Seam) roofing system with nominal 430 mm effective cover width & two major corrugations of nominal 65 mm depth. The flat portion of the panel shall have three longitudinal flutes parallel to major corrugations at pitch of nominal 107.5 mm center to center spacing for strength.(Considered to be factory/ site roll formed.) The profile should have 3micro ribs mini ribs to provide additional strength at the pan, and material test certificate (MTC) to be submitted for each lot supplied at site. Roofing Sheet Material: The galvanised iron colour coated base coils for production roofing sheets will be of nominal 0.5 mm Total Coated Thickness (TCT), Hi-strength steel with min. 300 MPa yield strength, metallic hot dip coated with Aluminium-Zinc alloy (55% Aluminium, 45% Zinc) as per ASTMA_755_2003G_80_550 Class1 & IS 15961 (2012) Galvalume AZ150 (Min. 150 gms/sq.mt total on both sides) with Regular modified quality paint coat . The paint shall have a total coating thickness of nominal 25 μm, comprising of nominal 18-20 μm exterior coat on top surface and nominal 5-6 μm reverse coat on back surface over nominal 5 μm primer coat on both surfaces of approved colour shade by concern authority. The steel manufacturer's test certificate for the chemical and mechanical properties of steel must be submitted for approval by the concerned authority prior to installation. The sheet shall have brand marking of the manufacturer giving product details on the back of the sheet at every 1 meter c/c for confirming genuinity of the material.System should accompany with The support aluminium clip shall be manufactured from extruded aluminium alloy 6061 T6 in accordance with BSEN 485 part 2. Each aluminium clip shall be coupled with a 5mm thick black polyamide thermal barrier base pad. and fixed on Aluminum clip and which is fixed to steel with SS-304 screwsand standard accessories like Foam Fillers, Drip Angles to ensure weather tightness.Complete installation to be done by specialized team with safety & Site engineer of roofing sheet manufacturer or through authorized installer of the manufacturer.

All the accessories like flashing / capping shall be made from the same material (or manufacturer’s recommendation) which is used for main roofing & cladding applications.

Removing the existing cement plaster of any thickness without causing dust nuisance and stacking the debris upto a distance of 50 metres or spreading in the compound and cleaning the site etc. complete. Spec. No.:- As directed byEngineer in charge.

Replacement of existing damaged Expansion joints by providing and laying of Strip Seal Expansion Joint System, including removal of existing damaged exp joints by dismantling of deck slab, wearing coat etc. and back filling of the recess up to final finish level with conc of grade M-35, complete as per M.O.R. T&H specification. Spec. No.:- As directed byEngineer incharge

Providing and fabricating structural steel work in rolled sections like joists, channels, angles, tees etc. as per detailed design and drawings or as directed including cutting, fabricating, hoisting, erecting, fixing in position making riveted / bolted /welded connections without connecting plates, braces etc. and including one coat of anticorrosive paint and over it two coats of oil painting of approved quality and shade etc. complete. Spec. No.:- Bd.C.2 Page One Number 275

Providing, fabricating and erecting at site of work the tubular steel structure (shed) as per standard design and specifications having various spans in between trusses and in multiples of standard length of bays as specified as per standard specifications, inclusive of cost of steel tubular trusses, tubular columns purlins, tie runners, foundation bolts, base plates, nuts and bolts, welding wherever required etc. as per detailed drawing inclusive of one coat of anticorrosive paint and two coats of oil painting of approved quality and shade etc. complete. Spec. One Number : As directed by Engineer-in-charge. Spec. No.:- B-18 Page One Number 78

Providing sand faced plaster externally in cement mortar using approved screened sand, in all positions including base coat of 15 mm thick in cement mortar 1:4 using waterproofing compound at 1Kilogramper cement bag curing the same for not less than 2 days and keeping the surface of the base coat rough to receive the sand faced treatment 6 to 8 mm thick in cement mortar 1:4 finishing the surface by taking out grains and curing for fourteen days scaffolding etc.complete. Spec. No.:- Bd.L.7 Page One Number 369

Providing and applying two coats of exterior acraylic emulsion paint confirming to corresponding I.S. of approved manufacture and of approved colour to the plastered surfaces including cleaning ,preparing the plaster surface, applying primer coat ,scaffolding if necessary , and watering the surface for two days etc complete. Spec. No.:- As directed by Engineer in charge.

Removing old paint from steel and other metal surfaces and making the surfaces even with hand scrapping, scaffolding etc. complete. Spec. No.:- As directed by Engineer incharge.

Providing and applying priming coat over new/old steel and other metal surfaces including preparing the surface by thoroughly cleaning oil, grease, dirt and other foreign matter and scoured with wire brushes, fine steel wool, scrappers and sand paper, scaffolding etc.complete. Spec. No.:- As directed by En-gineer in charge.

Providing and applying two coats of flat oil paint of approved colour to the old structural steel work and iron work previously painted in building including scaffolding, if necessary, cleaning and preparing the surface (excluding primer coat) etc. complete. Spec. No.:- Bd.0.6 Page One Number 406

Providing and applying first single coat of approved primer and two coats of fire retarding paint of an approved make as per manufacturers specifications to any surfaces, at all height and locations as directed including scaffolding, scraping, cleaning and preparing surfaces for painting by any approved means etc. complete as directed by Engineer-in-charge.

Providing and applying 2 coats of alluminium paint of approved make to new structural steel work in buildings and workshops including scaffolding if necessary, cleaning and preparing the surface (excluding primer coat)etc. complete. Spec. No.:- Bd.0.4 Page One Number 405

Supply, fixing and installation of 4mm thick Aluminium Composite Panel (ACP) of approved colour for external cladding in combination of solid and metallic colours, including all necessary Framework, support and complete weather sealing as per architectural drawing. The Aluminium Composite Panel (ACP) should be made out of thermoplastic core of low-density polyethylene LDPE (100% virgin mix), sandwiched between two aluminium sheets of ALLOY GRADE- 5000 series, each not less than 0.50 mm thick, total thickness of aluminium composite panels not to be less than 4 mm, the exposed surface thereof shall have Stove lacquered finishing coat not less than (26 + - 2) micron (containing minimum 70% kynar 500 based PVDF) of colour and shade as per architectural design. The inside surface (facing the building exterior surface)shall have polyster based powder coating not less than 25 Micron with protective peel-off foil on the exterior face (peel off film will in no case leave any adhesive mark over the composite panel surface after it is peeled off). The supporting framework shall be made out of 50 mm X25mm X 3mm thick Aluminium section to be spaced horizontally and vertically for fixing of panel of size 900 mm X 1200 mm and fixed to the building structure as per design through 50mm X50mm X5 mm MS angle clamps prefixed to masonry or slab, columns with Hilti make anchor fastener screws. The fixing of panel to be done with the help of VHB tapes and screws and all the sealing of joints to be done with weather sealent Silicon as directed by Engineer-in-charge. (Prior permission of S.E. is necessary before inclusion of this item in estimate) Spec. No.:- As directed by Engineer in charge