Supplying and fixing of GI sheet frames (Chowkat) consisting of 18 gauge (1.25mm) thick steel sheet of the specified section (standard design latest), including iron lugs (hold fasts) iron hinges conforming to PWD specifications including bolts for fixing steps, lock notch provision for receiving tower bolts and finished, fixed in position including the cost of cement concrete 1:3:6 for filling in the frame and cement concrete 1:2:4 for lugs complete to the satisfaction of Engineer-in-charge. Doors and windows frame of size 151mm x 60mm with 35 mm wide double rebate weighing3.95 kg per meter.