UP Jal Nigam Tender

Construction of new R.C.C Over Head Tank (OHT)

Supply of all the materials, labour T&P and construction of a R.C.C. Over head tank above ground level with main components, based on IS-3370 or liquid storage concrete in over head tank and foundation concrete as per specification in I.S. 2911.Following capacity/Staging All Components of OHT will be casted in M-30 concrete with cement, coarse sand and approved stone grit as per I.S. 11682 and I.S. 456.Minimum depth of foundation below original ground level will be 2.5 M.Seismic effects and wind load should be taken into consideration as I.S. 1893 for earthquake resistance and I.S. 875 part-III for wind load on structure. The asumed bearing capacity of soil has been taken as 8 T/sqm.1m wide RCC dog legged stair case from ground level to balcony & Top dome.M.S. ladder made of 50 X 50 X 6 mm angle sectio and 20 mm plain M.S. bars (specification of M.S. should be as per IS 800-2007) with hand rails of 20 mm medium class G.I. pipes on both sides in three rows from balcony to top dome resting on an RCC plateform (75 X 75 cm and 10 cm thick) projecting from top ring beam and one alluminium ladder inside the tank body (from manhole to tope dom to bootom dome).1 m wide R.C.C. balcony around the tank at the junction point of vertical wall and conical wall.Proper R.C.C. railing and 20 mm dia medium class G.I. pipe (in 3 rows) on both sides of stair case, arround the balcony at each landing from landing with top ring beam upto manhole on the top dome and at the periphery. The G.I. pipes will be supported on R.C.C. posts of 100 mm dia or on the posts made of 50 X 50 X 6 mm M.S. angle section, spaced at intervals not more than 1.5 m.Proper ventilator at top dome in circular shape of 1.2 m dia along with an R.C.C. cover of minimum 1.50 m dia and 7.5 cm thickness, pillar of vintilator should be minimum 50 cm dia. The space between top dome and R.C.C. cover should be covered with mosquito net of standered qualitity along with expended metal jali,Electro Megnatic Flow Meter,digital level indicator ,Lightening conductor as per I.S.S. 2309 of its latest amendments of latest electricity rules. It should consist proper elevation rod with 5 or more fork points proper down conductors of prescribed mental of proper size prescribed by ISS 2309-1969 and ISS 3013-1966.D.I. manhole of min 60 X 60 cm size made of M.S. channel section with adequate cover made of M.S. sheet of minimum 3mm thickness hinged with manhole with locking arrangment. This manhole should be fixe at top dome at proper place. including soil test and other

Zone -2 350KL/20M