tender for issr sor 3.9.1 excavation for pipe laying (exceeding 30 cm in depth) including disposal of excavated earth with all lift and lead up to 50 m, disposed earth to be levelled and neatly dressed. all kinds of soils , v2 sor 19.1.2/208 centering and shuttering including strutting, propping stretching etc. complete for and removal of form work by sheet plate or ply wood shuttering for : walls (any thickness) including attached pilasters, butteresses, plinth and string courses etc , v2 sor 4.1.3/32 providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering all work up to plinth levelcement concrete grade m-15 (nominal mix) with 20 mm maximum size of stone aggregate , v1 issr 6.4 providing and laying cement concrete grade m-20 with 20 mm graded crushed stone aggregate, mixing shall be in mechanical mixer, laying with paver compacting by use of pin, plate / screed vibrators including form work by strong steel girders fixed by spikes, separation membrane 125 micron thick, including cutting of joints @ 4 to 5 m interval and filling it with hot applied bituminous sealant (without dowel bars) (max.thickness 20 cm). , v3 sor 22.6.2/233 providing and laying non-pressure np2 class (light duty) reinforced cement concrete pipes with collars jointed with stiff mixture of cement mortar in the proportion of 1:2 (1 cement : 2 fine sand) including testing of joints etc. complete : 150 mm dia. reinforced cement concrete pipe