bids are invited for boqauto extension if any seller submits price in last 15 minutes, the rawill be auto extended by 15 minutes ( a maximum of10 times ) average turn over of last 3 years 75 lakh ( s ) total quantity : 1--1 ismb indian standard medium beam 150mmx75mmx4 mtr long minimum weight 15.00 kg per meter with tolerance -2% to +5% confirming to is-808 ( part i ) - 1973. the length of the ismb shall be 4 mtr . ismb shall be applied with one shop coat of red oxide primer. make: sail / tata 2 srt steel roofing trough 2400mm long made out of 2mm thick @ 36kg each with tolerance -2% to + 5 %, hot rolled carbon steel sheet confirming to is specification with 16 nos 12mm dia long bolt, machine made ( heavy duty complete threaded with one nut and two washers of 30mm outer diameter and 3mm thick, per bolt, per srt. the overall width of srt shall be 613mm and height shall be 180mm. the shape of srt shall be regular and angle of bending shall be maintained properly. the srt not found properly in shape shall be rejected. make: tata / sail 3 sand bags hdpe sand bags barrel type double stitched at one end std quality double colour brown and size 840mm x 360mm nylon with suitable tying cord as per is 14252 / 1995. weight should not less than 85 gms as per sample approved by this regiment. 4 cgi sheet cgi sheet 2400mm x 910mm x 0.63mm with zinc coating of 120 gms / sqm ( on both sides ) conforming to is 277-1977 make- sail / tata / jsw 5 ldpe film ldpe film ( low density polythene ) as per is-2508-1984 shall contain not less than 2.0% of carbon black of an average particle size 300 micron, 4m wide weight per sqft must not be less from 25 gms.colour- black / og make – silpaulin ( 1700 sqft approx ) weight 44 kgs +-5% 6 gi binding wire gi binding wire 22 swg confirming to is 2062 / 1991 7 sand clean coarse river sand conforming to is 2116-1980 8 aggregate aggregate 10-20mm graded confirming to is 383-1970