construction of poultry shelter stage 2021-22 construction of poultry shelter stage 2021-22 perumpadppu g.p , road concreting , galvanised wire mesh of average width of aperture1.4 and nominal dia of wire 0.63mm , wire nail , mild steel tubes hot finished welded type , red oxide zinc chromate , welding by electric plant , m.s. heavy weight butt hinges 125x90x4 mm is:1341 marked , bright finished or black enameled mild steel screws 50 mm , oxidised mild steel tower bolt ( barrel type ) 200x10 mm , oxidised mild steel screws 30mm , galvanised steel jor l hooks 8mm dia , bitumen washer , g.i plain washer thick , precoated aluminium trafford sheet 0.45mm thick , stone aggregate ( single size ) : 20 mm nominal size , stone aggregate ( single size ) : 10 mm nominal size , coarse sand ( zone iii ) , portland cement