roof(admin) reconstruction reconstruction of roof (admin building) - roof reconstruction 2 providing and laying in position ready mixed or site batched design mix cement concrete for reinforced cement concrete work;usingcoarse aggregate and fine aggregate derived from natural sources,portland pozzolana / ordinary portland /portland slagcement,admixtures in recommended proportions as per is: 9103 to accelerate /retard setting of concrete, to improve durability andworkabilitywithout impairing strength; including pumping of concrete to site of laying, curing,carriage for all leads; but excluding the cost of centering, shuttering, finishing and reinforcement as per direction of the engineer-in-charge;for the following grades of concrete. note: extra cement up to 10% of the minimum specified cement content in design mix shall be payable separately.in case the cement content in design mix is more than 110% of the specified minimum cement content, the contractor shall have discretion to either re-design the mix or bear the cost of extra cement. 3 centering and shuttering including strutting, propping etc. and removal of form for 4 suspended floors, roofs, landings, balconies and access platform 5 all works above plinth level upto floor v level 6 concrete of m25 grade with minimumcement content of 330 kg/cum 7 lintels, beams, plinth beams, girders, bressumers and cantilevers 8 steel reinforcement for r.c.c. work including straightening, cutting, bending, placing in position and binding all complete above plinth level. 9 thermo-mechanically treated bars of grade fe-500d or more. 10 demolishing r.c.c. work manually/ by mechanical means including stacking of steel bars and disposal of unserviceable material within 50 metres lead as per direction of engineer - in- charge