supply of double storey living shelter ( excluding construction materials ) . , double storey puf insulated prefab modular shelter of size 16800mm x 6100mm including 1550mm wide verandah will be constr under the job . the wall panels will be made of 60 mm thick 40 kg / m3 density puf insulation between 0 . 5 mm thick pre coated galvanized iron sheet on both sides . the puf panels shall further be reinforced with 25 x 25x 4 mm ms hollow sections placed at 600mm spacing . the panels will have adequate arrangements ( with channels ) for joining the panels . the roofing of the structure will be with pre- painted gi trapezoid profile sheets of 0 . 60mm thickness green colour / camouflage pattern fixed with stsd screws . the sheets shall be laid with a minimum overlap of 200mm at ends and two ridges of corrugation on each side . false ceiling , windows and doors will be provided as per drg & specification given . all steel surfaces should be painted with two coats of synthetic enamel paint over one coat of red oxide . the rate includes complete structure nuts , bolts including electrification , construction materials , lightening conductor , kero heater , accessories & erection tools with isi mark .