construction of concrete road from dhadangri high school to to bera pukur at dhadangri , silver sand , polythene sheet , hire charges of shuttering plank ( 25mm-30 mm thick ) , thermocol 12 . 5 mm thick , miscellaneous , stone chips:20 mm nominal size , portland cement , stone chips:10 mm nominal size , stone chips:40 mm nominal size , loading unloading and stacking stone aggregate ( above 40mm nominal size ) , loading unloading and stacking sand and stone aggregate ( less than 40mm nominal size ) , coarse sand , hirecharges of concrete mixer 0 . 25 to 0 . 40 cum with hopper , nail , display board , work site facilities , gst