manakkal thazhe keezhattil ambalam nadappatha nirmanam footpath construction , description , stone aggregate ( single size ) : 40mm nominal size , stone aggregate ( single size ) : 20mm nominal size , coarse sand ( zone iii ) , portland cement , hire charge of concrete mixer 0 . 25 to 0 . 40 cum with hopper , vibrator ( needle type 40mm ) , sundries , stone for masonry work , hire charges of diesel road roller-8 to 10 tonne , diesel oil , rcc pipes np2 class 600mm dia , rcc collars np2 class 600 mm dia , fine sand ( zone iv ) , structural steel such as tees , angles , channels , and rs joists , red oxide zinc chromate primer , adjustable telescopic prop 3 m ( 2 . 02 -3 . 75 m ) , beam clamp 300-380mm ( 450-1070 mm ) , stone aggregate ( single size ) : 10mm nominal size