supply of op wks stores supply of various pre fabricated op wks items , water supply mild steel structure square pipe of size 3660mm x 2400mm x 2400mm of column , truss , roof purlin , coulmn purlin steel door , steel window foundation bolts hooks and all steel section as per appendix a . steel for schedule of structure shall confirm is-800 . , water staging platform made of ms angle of size 40 x 40 x 6mm for a 1000 ltrs puf insulated tank will be provided . the height of staging above ground level shall be 2400mm , below ground level 600mm and overall height will be 3000mm . one platform of size 1 . 7mtr x 1 . 7mtr will be provided with a frame of ms angle 40 x 40 x 6mm including 2mm thick ms sheet embedded in the frame . the diagonal bracings will be constructed of ms angle 40 x 40 x 6mm . a ladder made of ms angle 40 x 40 x 6mm of height 1800mm and width 300mm will also be provided . all as per brief specifications as specified . , angle iron picket fabricated with isa 40 x 40 x 5mm of 1830mm long as is 808 ( part v ) -1976 including two coat of synthetic enamel paint ( approved tint ) over one coat of red oxide primer , make : tata/sail , prefabricated shelter structure for ffl of size 2 . 4 mtr x 1 . 28 mtr shall be made of isa using puf panels in walls shall be made of 40mm thick composite puf panel sanwiched between ppgi sheets and door with puf panel shelter , all as per schedule of structure and as specified in brief specifications . steel shall confirm to is-800