tender for ward no. 15 construction of drains and cross drains in various streets; 1 1:3:6 or richer mix 2 all kinds of soil 3 cement concrete grade m-10 (nominal mix) with 40 mm maximum size of stone aggregate 4 cement concrete grade m-20 (nominal mix) with 20 mm maximum size of stone aggregate. 5 walls (any thickness) including attached pilasters, butteresses, plinth and string courses etc 6 cement concrete grade m-20 (nominal mix) with 20 mm maximum size of stone aggregate. 7 mild steel and medium tensile steel bars. 8 red sand stone 9 cement concrete grade m-20 (nominal mix) with 20 mm maximum size of stone aggregate