construction of compost pit for small scale farmers at kovillor ward ( 22 ) material supply , stone aggregate ( single size ) : 40 mm nominal size , stone aggregate ( single size ) :20 mm nominal size , coarse sand ( zone iii ) , portland cement , hire charges of concrete mixer 0.25 to 0.40 cumhire charges of concrete mixer 0.25 to 0.40 cum with hoppe , solid blocks of size 40x20x15cm , mild steel tubes hot finished welded type , welding by electric plant , stone aggregate ( single size ) : 10 mm nominal size , wall form panel 1250x500 mm , pvc corrugated roofing sheets , galvanised steel bolts & nuts 6 mm dia and 25 mm long round head with slots , galvanised steel j or l hooks 8 mm dia , g.i limpet washer , 100 mm channel shoulder 2.5 m long , vibrator ( needle type 40 mm ) , bitumen washer , fine sand ( zone iv ) fine sand ( zone iv )