tender for providing and fixing rcc benches under jurisidiction of ward no. 19 / clz. ; 1 pdg. and fixing of precast rcc benches ( chair bench with back rest ) using cement concrete grade m-30 consisting of 2 no. l-shaped base support of thickness 100mm having back height 1000mm, front height 450mm and base width 620mm having 5 no. of rcc planks 1500x100x50mm and one number plank of size 1500x200x50mm in the approved colour and shade. the min. weight of ms reinforcement bar in the base support will be 3.4 kg. having 4 nos. 8mm dia m.s. bar distributed along the section and periphery of the legs with sufficient no. of 4mm dia m.s. strrups. eachbase support will have 3 nos. 12mm dia ( 2 nos. 40mm and one no. 65mm long ) galvanised coupling nuts welded suitably to the main reinforcement at appropriate location so as to receive bolts for fixing of seats of concrete planks on base support and 3 holes to received c arriage bolts for fixing back rest planks. the min. weight of m.s. reinforfcement bar in the plank of 200mm wide will be 4.4 kg. and of 100mm wide 2.9 kg. all the rcc planks will have 2 holes of 14mm dia at appropriate location so as to receive 12mm dia galvanized bolts for fixing on the base support. one of the planks of size 1500x100x50mm shall be engraved in the centre at the back with letter sdmc or as directed by e-in-charge. 2 planks of size 1500x100x50mm and 1 plank of size 1500x200x50mm will be bolted to coupling nuts provieded in the base support on both side with 2 no. of 12mm dia and 65mm long galvanized steel csk bolts and one eva washer for each bolt to form a seat: 3 planks of size 1500x100x50mm will be bolted to coupling nuts provided inboth the base support to form back rest with 6 nos. ( two nos. in each plank ) half threaded carrige bolts and nuts of size 165m long and 8mm dia with eva and steel washers, assembling. side edges of all the planks shall be painted with acrylic bases paint of approved colour and shade and front portion of seating and back rest planks shall be polished to give glossy finish complete as per direction of e-in-charge. 2 engraving letters in hard stone 3 3. no payment shall be made for weight more than 90 kg.