bids are invited for ismb 150mm x 75mm x 5.80 mtr or beam , ismb 150mm x 75mm x 3.50 mtr long for beam , ismc 75x40, 3.5 m long welded with plate 250x250x6mm on one side with holes drilled , srt 1630 x 613 x 180mm made out of 2 mm thick hot rolled carbon steel sheet , steel roofing trough srt of size 1700 x 613 x 180mm made out of 2 mm thick hot rolled carbon steel sheet , srt of size 1270 x 613 x 180mm made out of 2 mm thick hot rolled carbon steel sheet , pbs roll self finished tarfelt hessian base for water proofing grade 1 , hdpe sheet 400 micron , hdpe sand bag of size 75x40 cm sand colour and each bag having weight not less than 60 gms , load bearing concrete pcc solid blocks of size 400mm x 200mm x 200mm using plain cement concrete , pre prefabricated steel door confirming to is 1038-1983 reaffirmed 2001 of size 900mm x1800mm. the door chowkhat frame made angle iron 50mm x 50mm x 6mm with 03 nos , ms hexagonal nuts. bolts and washer 12 mm dia 40 mm long , plywood 8 feet x 4 feet x 12mm thick , cgi sheet 810 x 1830 mm long, 0.63mm thick , red oxide primer conforming to relevant is , thinner sample to be approved before supply , natural m sand conforming ton relevant is specifications for coarse and fine aggregates , agg 20mm stone aggregates to be crushed rock or gravel 20mm graded , agg 40mm stone aggregates to be crushed rock or gravel 40mm graded , agg 63mm. stone aggregates to be crushed rock or gravel 63mm graded total quantity : 28459