tender for construction of reinforced cement concrete in m-25 design mix over head sector storage tank of 20000 ltrs. capacity with 15.00 mtrs. staging height from ground level to bottom of dome slab comprising of inlet, scour & over flow pipes as per details given below from ground level to tank including bends of required degrees,valves of required size conforming to relevant codes reinforced cement concrete sprial 1.0 wide stair case/ ms stair case including ms pipe railing as per is specification, steel ladder 45 cms. wide of usual height as per site requirement , steel fibre reinforced concrete manhole cover ( medium duty) of 500mm dia and weight of frame and cover should not be less than 110 kg. ventilator at top dome with minimum opening of 90x90cms. water level indicator including floats and measuring gauge, lightening conductor with earthing arrangement etc.the reinforced cement concrete over head reservoir shall include randering/plastering of the uneven expose surface, two coats of snowcem paint and any other component requuired for the completion of the job to the entire satisfaction of engineer-in-charge. the offers shall also include detail structural drawing/ design calcualtions to be approved by the competent authority based on the raft foundation by taking seismic forces in the design calculation expension joints as required at site. the offer shall also inclcude the cost of providing and fixing of gms / ms pipes, and valves/ fittings complete including duck foot bends, puddle collars, expansion joints etc. connecting with rising main & distribution main with required length from the edge of foundation and any other components required for the completion of job upto the entire satisfaction of the engineer-in-charge. dia of piping arrangement :- inlet pipe = 65mm dia g.i. pipe medium class outlet pipe = 65 mm dia g.i. pipe medium class scour pipe = 65 mm dia g.i. pipe medium class overflow pipe = 65 mm dia g.i. pipe medium class