SPECIAL REPAIR TO FIRE STATIC WATER TANKS AND PROVN OF RAIN WATER HARVESTING IN BLDG NO P84 SWIMMING POOL IN CAMP AREA AT INS AGRANI COIMBATORE

Amount

Surface excavation n.exc (not exceeding) 30 cm deep and averaging 15 cm deep and getting out in hard/ dense soil.

Hardcore (broken stone or boulders) of gauge n exc. 63 mm, deposited, spread and levelled in layers n exc. 15 cm thick, watered and rammed to a true surface

M & L, 100 mm thick Cement concrete type B- 2, 1:2:4 (40mm graded aggregate) as sub base

M & L, 100 mm thick Cement concrete type B- 2, 1:2:4 (40mm graded aggregate) finishing even and smooth without using extra cement

M & L, 50 mm thick Cement concrete type B- 1, 1:2:4 (20 mm graded aggregate) with broom finish

M &L Forming Construction joint 30mm deep x 10mm wide filled with sealing compound

Removing excavated material exc 1.5Km but n exc 5Km and depositing where directed

S&F Aluminium ladder with hook on top embeded in tank wall of 8ft height 2 ft wide 3 mm thick section of approved manufacturer 4.5 inch flat step provided with both side handrails, ladder down provided with heavy rubber shoes

S&F Framed work such as grills, gratings, etc.. with ends of bars shouldered and/or riveted,or forged into spikes; framed guard bars; barred iron doors;ladders; framed balusters; walk ways; railings; framework of water tanks and similar work con- forming to Fe.290.Gde-E-165

S&F Rolled mild steel in Joist, channel, angle, or tee sections, fixed independently, without connecting plates, etc. (cut to ordinary lengths i.e. Within 20mm of the length indicated)Fe-290(Gde E-165)

Plates (plain or chequered) channels, square cut or notched (ordinary and counter sunk) forming holes, without any attachment Fe-290(Gde E-165)with riveted, bolted or welded attachment

Mild steel screw bolts (machine made) with hexagonal or square heads at one end and screwed the other, or screwed both ends, each screwed end to be fitted with washers and one hexagonal or square nut, but length of bolt exc 10cm and n exc 15cm long of diameter of neck 11 to 15 mm

S&F Stainless Steel welded wire mesh , 1.8 mm nominal dia of wire and average width of aperture 15.00 mm all as specified and directed

Demolition of cement concrete (unreinforced) in ground floor and paving not exc 15cm thickness below or above ground level.

M/L Rendering 15 mm thick in cement mortar 1:3 on concrete surfaces of wall/floor as in sunken floors , finished even and smooth without using extra cement, including application of two coats of water proofing chemical paste of brush bond powder and Nito bond liquid manufactured by MS FOSROC as per manufacturers instruction.

Applying evenly a tack coat of industrial bitumen 85/25 at the rate of 1.2 kg per sq.m including cleaning surfaces.

M/L Cement concrete type C2 , 1:3:6 , using 40mm graded stone aggregate, as in sunken floor treatment etc

Taking down cement plaster on brick or concrete surfaces, including racking out joints, hacking for key, scrubbing down with water etc.

M/L rendering 10mm thick as backing coat on fair face of brick work or concrete surfaces in cement mortar 1:4 in external plastering , and 5mm thick final coat in CM 1:4 with approved water proofing powder over the backing coat, finished even and smooth without using extra cement.

M/L rendering 10mm thick on fair faces of brick work or concrete surfaces in CM 1:4.

Supply only integral water proofing compound approved make.

M/L for Preparation of newly plastered surfaces and applying two coats of antifungal exterior emulsion over a coat of primer on external surface of walls

Cleaning of internal surface of static water tanks& removing any loose material on the existing surface. Surface cracks any found be filled up properly. Applying of two coats of Fixit powder Grade with an interval of 2 to 3 hours and allowing it to cure for 2 days.

M&L Antifungal/ antialgal treatment for water tank internal surface of any approved colour

S&F water level indicator including depth indicator & volume indicator markings preceisely with SS float and wire of approved make.

M& L for construction of recharge well suitable up to Ground Area 1 to 8 acres with Min. / Max. Intensity of Rainfall 12.5 mm to 75mm/hr execute with working Principle Gravitational Water Column Pressure having Operating Pressure 0.05 kg/cm2 to 0.6 kg/cm2 with Discharge Capacity 25,000 litres to 50,000 litres per day, Percolator Pipe 140mm HDPE Pipe with 8mm Spirally Perforated Holes at 30mm Intervals, Diameter of the Injection Well 2100mm, Depth of the Injection Well 6 meters, Diameter of the Recharging Bore 225mm, Depth of the Recharging Bore 20 to 60 meters Depending on Permeable Layer, Diameter of the Silt Trap Unit1350mm, Depth of the Silt Trap Unit 2 meters, Diameter of Filter Unit for Silt Trap Unit SS 304 Horizontal Mount - 200mm Slot Size: 3mm, Water Column Rings 20 Feet, Sleeve 100 Feet including all necessary plumbing connecting existing area drainage and overflow outward to main drain, pipe acessories and civil work from collection point of RWH to percolating/recharge well as per direction of engineer-in-charge.

Notes:- Scheme including supporting dwgs to be approved and vetted by CGWB/State govt. agencies before execution of work with appropriate direction of AGE(I).

p.chinnasamy

SUPER COOL