corrigendum - providing and fixing of floor tiles and other misc civil jobs of badminton court in copper club , demolishing cement concrete manually / by mechanical means including disposal of material within 50 metres lead as per direction of engineer - in - charge . 1:3:6 or richer mix , providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - all work up to plinth level :1:3:6 ( 1 cement : 3 coarse sand : 6 graded stone aggregate 20 mm nominal size ) . , reinforced cement concrete work in walls ( any thickness ) , including attached pilasters , buttresses , plinth and string courses , fillets , columns , pillars , piers , abutments , posts and struts etc . up to floor five level excluding cost of centering , shuttering , finishing and reinforcement : 1:1 . 5:3 ( 1 cement : 1 . 5 coarse sand : 3 graded stone aggregate 20 mm nominal size ) , centering and shuttering including strutting , propping etc . and removal of form for : walls ( any thickness ) including attached pilasters , butteresses , plinth and string courses etc . , providing and laying vitrified floor tiles in different sizes ( thickness to be specified by the manufacturer ) with water absorptions less than 0 . 08% and conforming to is : 15622 of approved make in all colours and shades , laid on 20mm thick cement mortar 1:4 ( 1 cement : 4 coarse sand ) including grouting the joints with white cement and matching pigments etc . , complete . , chipping on cement concrete flor with chiseling as per the direction of engineer-in-charge . , reinforcement for r . c . c . work including straightening , cutting , bending , placing in position and binding all complete . cold twisted bars