tender for supply of materials mgnregs for below is the material required for one soak pit to construct a total of 750 soak pits required in all 15 wards- 1 second class kail wood in planks 2 second class kail wood in scantling 3 safeda ballies 125 mm diameter 4 stone aggregate ( single size ) :20 mm nominal size 5 stone aggregate ( single size ) : 10 mm nominal size 6 coarse sand ( zone iii ) 7 portland cement 8 hire charges of concrete mixer 0.25 to 0.40 cum with hopper 9 vibrator ( needle type 40 mm ) 10 sundries 11 twisted steel / deformed bars 12 boulder 50 mm to 200 mm 13 pvc pipe 50 mm outer dia. 10 kgf / cm2 14 pvc pipe 63 mm outer dia. 4 kgf / cm2