tender for under critical gaps scheme, work of tin shed roof of multipurpose hall in rural area collectorate complex - steel work in built up tublar (round, square, rectangular hollow tube etc.) trussess etc. including cutting hoisting, fixing in position and applying priming coat of approved steel primer, including welding and bolted with special shaped washers etc. completed 2 providing and fixing precoated galvanised iron profile sheets (size, shape and pitch of corrugation as approved by engineer-in-charge) 0.50 mm (+0.05%) total coated thickness with zinc coating 120 grams per sqm as per is: 277, in 240 mpa steel grade, 5-7 microns epoxy primer on both side of the sheet and polyester top coat 15-18 microns. sheet should have protective guard film of 25 microns minimum to avoid scratches during transportation and should be supplied in single length upto 12 metre or as desired by engineerin- charge. the sheet shall be fixed using self drilling /self tapping screws of size (5.5x 55 mm) with epdm seal, complete upto any pitch in horizontal/vertical or curved surfaces, excluding the cost of purlins, rafters and trusses and including cutting to size and shape wherever required. 3 reinforced cement concrete work in beams, suspended floors, roofs having slope up to 15 landings, balconies, shelves, chajjas, lintels, bands, plain window sills, staircases and spiral stair cases above plinth level up to floor five level, excluding the cost of centering, shuttering, finishing and reinforcement with 1:1.5:3 (1 cement: 1.5 coarse sand(zone-iii) derived from natural sources: 3 graded stone aggregate 20 mm nominal size derived from natural sources) (for slab) 4 reinforced cement concrete work in beams, suspended floors, roofs having slope up to 15 landings, balconies, shelves, chajjas, lintels, bands, plain window sills, staircases and spiral stair cases above plinth level up to floor five level, excluding the cost of centering, shuttering, finishing and reinforcement with 1:1.5:3 (1 cement: 1.5 coarse sand(zone-iii) derived from natural sources: 3 graded stone aggregate 20 mm nominal size derived from natural sources) (for beam) 5 steel reinforcement for r.c.c. work including straightening, cutting, bending, placing in position and binding all complete upto plinth level. thermo-mechanically treated bars of grade fe-500d or more. 6 centering and shuttering including strutting, propping etc. and removal of form for all heights:suspended floors, roofs, landings, balconies and access platform. with water proof ply 12 mm thick.