Providing MS staircases and Fiberglass Reinforced Polymer Ladders for safe access to OHSRs OHTs and UG sumps replacing the existing rusted manhole covers of OHSRs OHTs and UG Sumps and providing flooring for underground sumps at various locations

Civil works

Structural steel work welded in built up sections/tubular sections, trusses and framed work, including cutting, hoisting, fixing in position including surface preperation by shot blasting followed by coat of approved Epoxy Zinc phosphate primer (DFT more coats not less than 40 micron) followed by Epoxy paint with two or more coat of approved shade etc complete as per the instruction of Engineer-in-charge

Deduct for dismantling steel work in built up sections in angles, tees, flats and channels including all gusset plates, bolts, nuts, cutting rivets, welding etc. including distembering and stacking, loading, unloading and transporting and taking out of IITM campus premises as per the direction of Engineer in charge.

Providing, fabricating, supplying, and fixing of Ladder made of Fibreglass Reinforced Polymer (FRP) resin structural members (Material of Construction: Isophthalic Polyester Resin – IFGR-30, Fire Retardant, UV Resistant, Food Grade), conforming to approved specifications, including all fittings and accessories, complete as directed by the Engineer-in-Charge with colour approved by IITM. The ladder shall consist of FRP vertical side square tube members of size 76 x76 x6.35 mm, FRP fluted tube rungs of OD 32 mm × ID 23.5 mm × 4 mm thick, 450 mm long, spaced at 300 mm centre-to-centre vertically. The ladder shall be firmly fixed to RCC/brick masonry wall using SS 304 grade wall brackets of size 203 mm × 55 mm × 9.5 mm, secured with SS 316 grade anchor bolts of size M12 × 100 mm. All nuts, bolts, washers, and fasteners shall be of SS 316 grade. The item rate shall include cost of all materials, labour, fabrication, erection, transportation, scaffolding, drilling, anchoring, and complete installation and directions of the Engineer-in-Charge

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level 1:2:4 (1 cement :2 coarse sand/ M sand :4 graded stone aggregate 20mm )

Providing and fixing 10mm dia 150mm Long Anchor fastener for fixing MS / SS frames including necessary drilling etc complete at all levels as per the direction of Engineer in charge.

Supplying and fixing of Fibreglass Reinforced Polymer (FRP) resin Manhole Cover (MD – Medium Duty - 12.5 MT Load Capacity) conforming to BS EN 124, with clear opening size 600 mm × 600 mm in approved colour by IITM, complete with locking and lifting arrangements. The material shall consist of Unsaturated Polyester Resin (UV Resistant ISO Grade), Emulsion Fibreglass Mat (E-Class), suitable accelerators, UV resistant pigment, and Polymer Concrete with quartz aggregate as core. The rate shall include supply, installation and removing the old manhole cover and fixing at OHTs, UG sumps, OHSR, etc., complete in all respects as per drawings and instructions of the Engineer-in-Charge.