tender for supply of stores for 10 x 3d printed ug force preservation tunnel (in-situ printing using locally available materials) - 3d printed reinforced cement concrete box culvert steel roofing trough (srt) of size 1500 613 180mm made out of 2mm thick hot rolled carbon steel confirming of is 5986 ee 330 complete with set of 14 nos ms hexagonal nuts. bolts and washers 12 mm dia 40mm long and a spanner ojde of size 20-22 per 10 nos of srt. steel roofing trough (srt) of size 1100 613 180mm made out of 2mm thick hot rolled carbon steel confirming of is 5986 ee 330 complete with set of 14 nos ms hexagonal nuts. bolts and washers12 mm dia 40mm long and a spanner ojde of size 20-22 per 10 nos of srt. ismc 75 40 mm conforming to is 808-1973, 3.5m long. 3.0m long rectangular hollow section (rhs) of size 100 75 3.5mm at rafter of roof at entrance (16.02kg / m) steel door 4mm thick steel bench 2 ft width hdpe sheet 30 50ft fly ash bricks 300mm length 8mm tension ropes with turnbuckle 3d concrete printed ohp barrier admixtures and bonding agents cement opc 53 grade in hdpe bag of 50 kg each conforming to is-296/1989/1489/1991, cement/birla/ultra tech/dalmia. make: acc/ambuja/india sand coarse confirming to is 383-1970 in 15 kg bags graded stone aggregate coarse 20mm confirming to is 383-1970 in 15 kg bags graded stone aggregate coarse 10mm confirming to is 383-1970 in 15 kg bags