providing and fixing in position, heavy duty fully upholstered auditorium chairs 520mm c to c tip-up tipe. hight of back shuld be less than 1030 mm with plastic protective cover on back and bottom having teak wood handles. back to back distance is 1000 mm. the auditorium chairs should be of following specification 1. powder coated heavy duty ms stand. 2. individually moulded, ergonomically desined seat and back cushions. 3.moulded polyurethane fome cushion pu foamdensity 48-52 kgs / cu.mtr. 4.moduled polyurethand foam manufactured in certified iso 9001 faccility to ensure consistency in density for longevity. 5.upholstered in foam laminated stretch sand wich fabric for clean finish and soft comfortable feel as per the colour and pattern selected by the client. 6.seat and back should have moulded synthetic protective cover. 7.wooden or pu armrest65mm x 20mm -330mm long. 8.mounted using anchor fasteners. basic rate as per ssr of 2019-20 item no.51.18 & page no.459 basic rate.