corrigendum - construction double storey shelter , supply of double storey puf insulated prefab modular shelter of size 16800 mm x 6100 mm including 1550 mm wide verandah and clear height of each floor 2500mm will be constructed under the job . the wall panels will be made of 60 mm thick 40 kg / cum density puf insulation between 0 . 5 mm thick pre coated galvanized iron sheet on both sides . the puf panels shall further be reinforced with 25x25x4 mm ms hollow sections placed at 600 mm 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 . 6 mm thickness camouflage pattern colour / og colour fixed with stsd screws . the sheets shall be laid with a minimum overlap of 200 at ends . false ceiling , windows and doors will be provided as per drawing & specifications given . laminated wooden flooring to be provided over 24 mm plywood with shelter for first floor . 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 , central heating system , accessories , erection tools with isi mark & skilled labour charges ( if any ) . nothing extra shall be payable on this account . the store ( per set ) required to supply for construction of double storey living shelter and the detailed technical specification of structure is given in ser no 2 ( sch of requirement ) of part ii of rfp . for : surya training node auli