estimate for rbm spreading from pmgsy road to h/o. manik roy at new rangia sansad within atharakhai g.p. under matigara development block. rbm spreading rbm spreading from pmgsy road to the h / o manik roy at new rangia sansad , earth work in excavation of foundation trenches or drains, in all sorts of soil ( including mixed soil but excluding laterite or sandstone ) including removing, spreading or stacking the spoils within a lead of 75 m. as directed. the item includes necessary trimming the sides of trenches, levelling, dressing and ramming the bottom, bailing out water as required complete. ( a ) depth of excavation not exceeding 1, 500 mm. , supplying, spreading and compacting rbm to required thickness, in layers not exceeding 150mm to prope gradient and camber, inundating each layer by water and packing and raming layer by layer to achieve desired compaction, including lighting, guarding, aricating , add cgst 6% , add sgst 6% , add cess 1%