tender for fixation of rate contract for supply of key construction material for various works of rural development and panchayati raj under vb-g ram g in panchayats of block samba. , portland cement (opc-43 grade) manufacturing company must be an iso 9001: 2015 certified company , crushed stone coarse aggregate ( bajri) , fine aggregate ( sand ) , stone (nallah) , structural steel such as tees, angles, channels and r.s. joists etc , twisted steel/ deformed tmt bars fe-500d and of different size/ dia , galvanised steel corrugated sheets of 0.50 mm thick with zinc coating. , bricks common burnt clay non modular of class desgination 7.5 , interlocking cement concrete paver block (60 mm thick, m-30) should confirm to the requirement of is 15658-2006. the manufacturing company must be an iso 9001: 2015 certified company , chequered terrazo tiles 22 mm thick (dark shade)