supply of pre-fabricated structures for amn shelter ( 50mt ) in 2 mtn div sector , for : hayuliang ( dist-anjaw / arunachal pradesh ) , ammunition shelter ( large ) . size 18 . 0m x 6m with 3m wide covered verandah , two steel doors of size 3 . 5 mtr x 3m , four steel trusses made of portal frame structure . main column with web-300~200x5mm thick and flanges of 125x8mm thick , main rafter with web-250~150x5mm thick and flanges of 100x8 mm thick , 110x8mm thick and cantilever verandah rafter of same dimension . the four main portal frames are provided at a distance 6 . 0 mtr centre to centre and interconnected by z/c purlins at spacing all as given in the drawing . wall cladding is made of 0 . 6mm thick ppgi colour sheets fitted on z rafters . roof cladding is made of 0 . 6mm ppgi colour coated sheets . all as per detailed specification as per sch-i ( a ) of rfp & drg att .