Construction of 1000KL Capacity OHSR tank beside New Goshala (5th call)

Construction of 1000 KL capacity OHSR(VRCC) with 15 mts staging,with SBC of 20 T/Sqm, wind pressure of 250Kg/Sqm and sesmic forces for Zone -II (The specification was adopted as per AP SSR 2023-24 in Public Health Dept. - item No.43) The above rates are arrived with base rate of Cement Rs.4220/- per MT & Steel Rs.63000/- per MT (Fe500) ((Bo CE rates for the month of Feb 2023) and as per the sand rates finalized by the BoCE's communicated vide G.O.Rt.No.2029, water resources (Reforms) Dept., dt.06.10.2022 All concrete components shall be designed with M30 Design Mix proportion. For intermediate capacities proportional rates shall be adopted. The foundations shall be designed for Annular Raft Footings. The above arets are applicable for Elevated level Surface Reservoirs / OHSRs for SBC of 20 T/Sqm For every decrease of 2.50 T /Sqm of SBC, the rate shall be increased by 2.50% on basic rate. For every increase of 2.50 T /Sqm of SBC, the rate shall be decreased by 1.0% on basic rate up to 20 T/Sqm. For staging less than 15m, the rate shall be decreased by Rs.0.05 paisa on basic rate per litre per every meter decrease in staging. For staging above15m, the rate shall be increased by Rs.0.10 paisa on basic rate per litre per every meter additional staging. The rates shall be increased/ decreased due to increase/decrease in the cost of cement by Basic rate x ((Rc-4220)/4220) x 0.07 where Rc = Rate of Cement (Rs per MT) at the time of preparation of estimate The rates shall be increased/ decreased due to increase/decrease in the cost of Steel by Basic rate x ((Rc-63000)/63000) x 0.2 where Rc = Rate of Steel (Rs per MT) at the time of preparation of estimate Rate inclusive of three coats of epoxy paint Food Grade of best quality to inner surface of the Reservoir including roof. The rate inclusive of 2 coats of weather proof emulsion painting for external surfaces, lettering, all required fixtures, Pipes, Pipe specials, valves of DI material, Valve chambers etc., for pipe connections including cost of pipes, specials and valves as per departmental designs and drawings. The rate adopted for a wind pressure of up to "250 kg/Sqm". For every 100 kg/Sqm decrease in wind pressure, the rate shall be decresed by 5%. The basic rate is adopted by considering the design for Seismic forces for Zone II only of seismic zones. The basic rates shall be increased by 15% for Zone III of Seismic zones. The ELSR/OHSR shall be designed with minimum of two rows of columns for capacities above 500 KL & up to 1000 KL. The ELSR/OHSR shall be designed with minimum of three rows of columns for capacities above 1000 KL. The shaft type staging with slip form can also be provided with proper approval from competent authority without any additional cost.

The basic rate is inclusive of following Fixtures (I) Pipe connections & Specials with D.I materials (a) All pipe connections for Inlet, Out let, Over Flow, Scour pipes shall be provided with D/F DI material. (b) The Valves for above pipe connections also shall be of DI material of PN 16 duty confirming to the specification of SoR item No.28 (c) All specials such as Bends, Tees, Reducers, Duck foot Bends, Bell mouths etc,. Shall be of DI material.a) For 800 KL to 1500 Kl ELSRs., Inlet Pipe - 400mm dia, Out let Pipe - 450mm dia. DI valves – 2 No’s , Over Flow pipe - 450mm dia. , Scour Pipe - 200mm dia. Note: Any deviation from the above sizes as per design, shall be paid or recovered. (III) Manhole Frames & Covers: a) All man hole Frames & Covers shall be made of CI/DI materials with min. size of 0.60mX 0.60m - For Roof & Valve Chambers. CI/D.I Double Swan neck ventilators (min. of 150mm dia.) shall be provided in top dome and slab with mosquito/fly proof nets - 4Nos. RCC Finial ventilator with fly/bird protection with GI mesh - 1 No., RCC precast ladders of 0.60 m width - 2 Nos. RCC dog legged stair case of 1.00 m flight width and 1.20 m landing width R.C.C hand railing of 1.0 m height – 1 No The staircase shall be enclosed with brick masonry walls on three sides and collapsible MS gate on front side up to 1st brace level, to prevent unauthorized entry. Construction of R.C.C valve chambers as per Standard Drawings with RCC cover slab fixed with CI/DI manhole Frame & Cover with lock and Key arrangement. The Mix shall not be less than VRCC M 20 grade with 150mm thick side walls, 150mm thick top slab, 150mm thick base slab over base course of 100mm thick (1:4:8) prop. Balcony of 1.00 m width at floor slab level / middle ring beam level by using Stainless Steel pipe of grade 304 hand railing up to 1.20 m height, with top railing of 40mm dia. pipe & middle railing of 25mm dia. and verticals with 40mm dia. at an interval not more than of 1.00m c/c. Water Level Indicator of reputed make – Digital type (1 No) and Conventional type (1 No) Lightening Arrestor with all its accessories complete including earthing, with relevant IS Codes - 1 No. xiii) Compound wall: Construction of compound wall including ornamental M.S.Gate of size 3.0 X 2.40m is included in the basic rate of ELSRs. Length of compound wall hall is minimum of 150m. Min. height of the compound wall shall be 1.80m above plinth and thickness 230mm in brick masonry in CM (1:6).The compound wall shall be constructed including earth work excavation in all types of soils for plinth beam of 230mm X 300mm and 0.75X0.75X1.20m size for column footing portions. The footings shall be of 0.75X0.75X0.25m in VRCC M20 grade and constructed over a C.C (1:4:8) prop bed of 100mm thick. The columns shall be of 230X230 mm in size with VRCC M20 grade at 3.00m c/c spacing, having depth of 1.20m below ground level and height of 2.00m above GL. The plinth beam of size of 230X300 mm shall be constructed in VRCC M20 grade at Ground level, over a bed of CC(1:4:8)-100mm thick. 450X450mm size columns in M20 grade shall be constructed for gate pillars. All the materials shall be followed as per the standards.

Tie beam shall be provided above the brick work with 230X200mm size, fixed with MS angular of 25mm X 25mm X 4mm in "Y" shape to height of 0.60m, with embedded length of 150mm in concrete. The barbed wire fencing with 3 ply of 18 gauges shall be stretched in 4 rows (2x2). Plastering shall be done with 16mm thick in two coats i.e., base coat 12mm thick in CM(1:6)prop and 4mm thick 2nd coat CM(1:4) prop on both sides of brick work. Snowcem paint in two coats shall be provided for both sides of wall. The M.S ornamental gate as per the approved drawings shall be provided with minimum of 3.60mts width and 2.40mts height with enamel paint. Yard lighting shall be arranged on four corners of compound wall. If the length of the wall is increased/decreased Note:-For every 1m increase/decrease in length of compound wall the increase/decrease in basic rates of ELSRs of the capacities from 500KL to 2500KL shall be as follows.: i)500 KL : 0.086% ii)1000 KL : 0.047% iii)1500 KL : 0.034% iv)2000 KL : 0.026% v)2500 KL : 0.022 % For intermediate capacities, interpolated percentages shall be adopted. xiv) Staff Quarter shall be constructed for a minimum plinth area of 40 Sqm with the following specification: RCC framed structure with concrete grade not less than M20 design mix at the locations specified by the department at the time of execution with veranda, hall, bed room, kitchen and bath &W/C with floor area of 40.00sqmts excluding balconies and staircases. MS hollow door frame with cold rolled processed steel sheet 1.25mm thick bright CRCA conforming to IS 4351/76, Flush door shutters with solid bond wood bond board doors shall be provided. N.C.L. Windows centre fixed both sides open able shutter window 1.35 X 1.35mts outer frame section 48 x50mm shutter frame section with a size of 48 X20 mm mullion section of size 48 X 50mm fixed beading section of 12 X 12 mm shall be provided. Flooring with polished Kadapa stone shall be provided. Walls shall be provided with snowcem paint in two coats over primary coat. Electrical and water supply arrangement shall be provided as directed by dept officer. Water Storage tank made with plastic/polymer material of reputed make with necessary out let and inlet connection pipes shall provided. Septic tank for 5 users shall be provided.