supply of 4 seater seel bench with back rest: stainless steel 304 grade matt finished, stainless steel sheet / plate shall be of 1.6 mm thick, round pipe shall be of 50 / 40 mm dia and 2 mm thickness, square pipe shall be size 40 mm x 40 mm and 2mm thickness, base plate shall be 8 mm thick, and fastener shall be of size 8 mm x 100mm, the punching / perforation in seating plate and back rest shall be done by turret punching machine as per approved sample for punching. all fabrication work shall be done on roller machine by cnc laser cutting and argon welding. the argon welding shall be done by tig ( tungsten inert gas ) . arc welding method as per is- 9604. joint shall be weld under controlled condition to avoid formation of crack and metal flow at welding point by using tungsten electrodes as per is-13907 and ss304 grade filler material. welds should be treated with k-2 solution. all the joints shall be finished and polished using automatic polishing machine to match with parent material. bench details: lenth-1750 mm, width-450 mm, clear height- 450 mm, base plate to be fixed on ground: 355 mm x 175 mm x 8mm, connecting leg: 355mm x40 mm. back rest details: length-1750mm, width-300mm, seat and back rest connecting pipe shall be of 40mm dia and 2 mm thickness, clear height of bench with back rest 890mm, weight approx. 44 kg.warranty- 1 year. [ warranty period: 12 months after the date of delivery ]