bids are invited for raising random rubble masonary boundary wall at nii, new delhi; 1 random rubble masonry with hard stone in superstructure above plinth level and upto floor five level, including leveling up with cement concrete 1:6:12 (1 cement : 6 coarse sand : 12 graded stone aggregate 20 mm nominal size) at window sills, ceiling level and the like. pigments etc., complete. cement mortar 1:6 (1 cement : 6 coarse sand) 2 dismantling of existing mild steel railing and channels of approx 5 height and painting the same with two coats of black enamel paint and refixing the same at new available height with having channels fixed in cement concrete 1:2:4 mix and railing fixed with new nuts & bolts as per existing at various levels including the cost of scaffolding complete with all labour, t & p etc as required