re tender tharachandiyil valiya veettil ovupalam nirmanam construction of culvert drainage , 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 cum with hopper , vibrator ( needle type 40 mm ) , sundries , stone aggregate ( single size ) : 10 mm nominal size , wall form panel 1250x500 mm , corner angle 45x45x5 mm 1.50 m long , 100 mm channel shoulder 2.5 m long , double clip ( bridge clip ) , single clip , m.s. tube 40 mm dia , twisted steel / deformed bars