bids are invited for ug living bunker of size 5.18mtr x 3.65mtr , hydrophobic poreblocking ingredients pcc , soakage pit cover made of 1mm thick ms sheet , rubber memberance for water proofing , ismb size 150 x 75mm , ismb conforming to is 808 2021 is 2062 2011 , ismc size 75 x 40mm , ismcs size 75 x 40mm , 12mm dia 150mm long foundation bolt , 5mm thick ms plate , 16mm dia 100mm long foundation bolt , steel roofing trough size 2000x613x180mm , steel roofing trough size 2438x613x180mm , prefabricated steel door , steel window 1200mmx300mm , pre fab welded door , pr fab welded window loop hole , 3 m long rectangular hollow section , 2 30m long rectangular hollow section , 150mm long ms angle , self taping screw 75mm , mild steel tmt bars 12 mm dia , mild steel tmt bars 08 mm dia , ms binding wire 9 mm dia , 0.60mm thick ppgi sheets size 4270x1000mm , ply wood 10 mm thick , ply wood 2.00m x 0.30m and 12mm thick , natural sand , manufactured sand , aggregate 20mm. , aggregate 40mm , aggr