tender for construction of bottle booth and installation , bottle booth , 9.48.1 providing and fixing m.s. grills of required pattern in frames of windows etc. with m.s. flats, square or round bars etc. including priming coat with approved steel primer all complete.fixed to steel windows by welding , 50.10.1 steel work in built up g i tubular ( round, square or rectangular hollow tubes etc.) trusses etc., including cutting, hoisting,fixing in position and applying a priming coat of approved steel primer, including welding and bolted with special shaped washers etc. complete , 13.53.1 painting on g.s. sheet with synthetic enamel paint of approved brand and manufacture of required colour to given an even shade:new work (two or more coats) including coat of approved steel primer but excluding a coat of mordant solution.