Supply, fabrication, and erection of MS (Mild Steel) structural canopy with insulated PUF (Polyurethane Foam) roof panels including painting, fixing, and allied works for the RAN-NG Lab

Chipping of unsound/weak concrete material from existing surface with manual Chisel and/ or by standard power driven percussion type or of approved make including tapering of all edges, making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. and disposal of debris for all lead and lifts all complete as per direction of Engineer-In-Charge.

Dismantling doors, windows and clerestory windows (steel or wood) shutter including chowkhats, architrave, holdfasts etc. complete and stacking within 50 metres lead

Drilling suitable holes in Reinforced Cement Concrete slab using power-driven drill machine to a depth of 50 mm to 75 mm to introduce steel bars/anchors, including fixing the steel bars in position with epoxy resin anchor grout of approved make, but excluding the cost of reinforcement, all complete as per the direction of the Engineer-in-Charge.

Design, providing and fixing structural steel work in built-up sections, trusses, and framed work, riveted, bolted, or welded as required, including cutting, hoisting, and fixing in position true to line and level, complete with application of one priming coat of approved steel primer over all surfaces; including providing and fixing carbon steel galvanised (minimum coating 5 micron) dash fastener of 10 mm dia, double threaded, 6.8 grade (yield strength 480 N/mm²), counter sunk head, comprising 10 mm dia polyamide PA-6 grade sleeve, including drilling of holes in frame, concrete/masonry, etc., all complete as per direction of Engineer-in-Charge.

Providing and fixing centering and shuttering including strutting, propping, etc., and removal of form work for the specified structural components, using approved quality shuttering material to ensure true line, level, and finish of concrete surfaces, complete with necessary supports and props to withstand the load during casting, and dismantling/removal of the same after attaining requisite strength of concrete, all complete as per direction of Engineer-in-Charge.

Providing and laying in-situ cement concrete of mix 1:1.5:3 (1 cement : 1.5 coarse sand of Zone-III derived from natural sources : 3 graded stone aggregate of 20 mm nominal size derived from natural sources) for the specified structural component, including hoisting, laying in position, compacting, curing, and finishing, complete with all materials, labour, and tools required, as per direction of Engineer-in-Charge.

Providing and fixing Thermo-Mechanically Treated (TMT) reinforcement bars of grade Fe-500D or more, of 12mm diameter and 8 mm diameter as per the instruction of engineer in-Charge including cutting, bending, binding with annealed steel wire, and placing in position complete, as per direction of Engineer-in-Charge.

Providing and fixing PUF panel roofing of 50 mm thickness, comprising factory-fabricated sandwich panels consisting of PPGI sheets on both sides with rigid polyurethane foam insulation, laid to a two-way slope of 1:4 over approved structural steel framework, complete in all respects; PPGI sheets shall be minimum 0.50 mm thick conforming to IS 14246, of minimum 240 MPa steel grade with zinc coating not less than 120 GSM as per IS 277:1992, epoxy primer of 5–7 microns on both sides and polyester top coat of 18–20 microns on the outer surface; PUF core shall have minimum density of 40 ± 2 kg/m³, with panels tongue-and-groove/cam-locked to ensure watertight joints; panels shall have minimum projection of 300 mm from eaves and gable walls and shall be flushed at gable ends; fixing shall be done using self-drilling self-tapping screws with EPDM/rubber sealing washers, including J-hooks and nuts where required, ensuring complete sealing up to the sheet pitch; ridge joints shall be covered with 0.50 mm thick PPGI ridge covers fixed with self-drilling screws and rubber fasteners, and all joints, edges, penetrations, and abutments shall be sealed with matching 0.50 mm thick PPGI flashings to achieve complete weatherproofing; panels shall be supplied with protective guard film of 20–25 microns to prevent damage during transportation and erection, with necessary provisions for service pipe outlets through the roof, along with providing and fixing suitable PPGI/GI water gutters complete with brackets, supports, jointing, and sealing, all as per direction of Engineer-in-Charge.

Providing and applying 12 mm thick cement plaster of mix 1:4 (1 cement : 4 fine sand) on windows and pedestal columns, including scaffolding, raking out joints, watering, curing, and finishing to true line, level, and plumb, complete with all materials, labour, and tools required, as per direction of Engineer-in-Charge.