Construction of RCC railing of M30 Grade concrete, in-situ with 20 mm nominal size aggregate, true to line and grade, tolerance of vertical RCC post not to exceed 1 in 500, centre to centre spacing between vertical post not to exceed 2000 mm, leaving adequate space between vertical post for expansion, complete as per approved standard plans of MoRTH vide drawing no. SD/202. and technical specifications.the rate is inclusive of steel