26/EEC/BSNL/CD/BGL/2024-25

Amount

Demolishing cement concrete manually/ by mechanical means including disposal of material within 50 metres lead as per direction of Engineer - in - charge.

Nominal concrete 1:3:6 or richer mix (i/c equivalent design mix)

Excavating trenches of required width for pipes, cables, etc including excavation for sockets, and dressing of sides, ramming of bottoms, depth upto 1.5 m, including getting out the excavated soil, and then returning the soil as required, in layers not exceeding 20 cm in depth, including consolidating each deposited layer by ramming, watering, etc. and disposing of surplus excavated soil as directed, within a lead of 50 m :

All kinds of soil- Pipes, cables etc. exceeding 80 mm dia. But not exceeding 300 mm dia metre

Extra rates for quantities of Earth work in excavation executed: (Note- The extra percentage rate is applicable in respect of each item but limited to quantities of work executed in these difficult conditions. The unit, namely, metre depth, to be considered for payment, shall be the depth measured from the sub soil water level up to the centre of gravity of the qty executed in difficult conditions. The depth shall be reckoned correct to 0.10 m, 0.05 m or more shall be taken as 0.10 m and less than 0.05 m ignored.

In or under foul position, including pumping out water as required for All kinds of soil.

Earth work in excavation by mechanical means (Hydraulic excavator) / manual means in foundation trenches or drains (not exceeding 1.5 m in width or 10 sqm on plan), including dressing of sides and ramming of bottoms, lift upto 1.5 m, including getting out the excavated soil and disposal of surplus excavated soil as directed, within a lead of 50 m.

All kinds of soil.

Ordinary rock

Cutting tree roots encountered in foundation trench to receive bed concrete using carpenters saw, power cutter saw and axe wherever required complete as directed and disposal of debris to a lead of 50m.

Roots in trench of area upto 1.50sqm

Dismantling of manhole including R.C.C. top slab, C.I. cover with frame, including stacking of useful materials near the site and disposal of unserviceable materials within 50 m lead as per direction of Engineer-in-charge:

Rectangular manhole 90x80 cm and 45 cm deep

Cleaning of chocked sewer line by diesel running vehicle mounting hydraulic operated high pressure suction cum jetting sewer cleaning machine fitted with pump having 4000 litres suction capacity and 6000 litres water jetting tank capacity including skilled operator, supervising engineer etc. for cleaning and partial desilting of manholes and dechocking of sewer lines. Dechocking and flushing of sewer line from one manhole to another by high pressure jetting system of 2200 PSI for sewer line from 150mm dia upto 300mm

Dewatering sewage water entering in excavated trenches of manholes/pipe lines with 1HP submersible sewage pump and HDPE/PVC hose pipe up to 50m for discharge of sewage water to nearby municipal drain ( rate shall be quoted for hire, carriage & operation charges of pump & hose pipe)

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level :

1:4:8 (1 Cement : 4 coarse sand(zone-III) derived from natural sources : 8 graded stone aggregate 40 mm nominal size derived from natural sources).

Filling available excavated earth (excluding rock) in trenches, plinth, sides of foundations etc. in layers not exceeding 20cm in depth, consolidating each deposited layer by ramming and watering, lead up to 50 m and lift up to 1.5 m.

Providing and laying under ground low density foamed cellular wall PVC pipes and collars conforming to IS:16098 (PART-1) including fixing pipe ends with solvent based cement adhesive in proper alignment complete as directed. (Note: The joint shall be tested for leakage before covering with infill material over the pipes)

160mm diameter PVC pipe of SN4 class, self fit type

Constructing brick masonry manhole in cement mortar 1:4 ( 1 cement : 4 coarse sand ) with R.C.C. top slab with 1:1.5:3 mix (1 cement : 1.5 coarse sand (zone-III) : 3 graded stone aggregate 20 mm nominal size), foundation concrete 1:4:8 mix (1 cement : 4 coarse sand (zone-III) : 8 graded stone aggregate 40 mm nominal size), inside plastering 12 mm thick with cement mortar 1:3 (1 cement : 3 coarse sand) finished with floating coat of neat cement and making channels in cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size) finished with a floating coat of neat cement complete as per standard design

Inside size 90x80 cm and 45 cm deep including C.I. cover with frame (light duty) 455x610 mm internal dimensions, total weight of cover and frame to be not less than 38 kg (weight of cover 23 kg and weight of frame 15 kg) : With common burnt clay F.P.S. (non modular) bricks of class designation 7.5

Extra for depth for manholes :

Size 90x80 cm With common burnt clay F.P.S. (non modular) bricks of class designation 7.5

Making connection of drain or sewer line with existing manhole including breaking into and making good the walls, floors with cement concrete 1:2:4 mix (1 cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size) cement plastered on both sides with cement mortar 1:3 (1 cement : 3 coarse sand), finished with a floating coat of neat cement and making necessary channels for the drain etc. complete :

For pipes 100 to 250 mm diameter

12 mm cement plaster of mix :

1:4 (1 cement: 4 fine sand)

Providing and fixing in position Fibre Reinforced Polymer (FRP) cover LD class- 2.50T (THERMODRAIN /NEXGEN or equivinalent) with matching frame including fixing with nails/screws, removing existing damaged frame and disposal of the same complete as directed by E-I-C.

Rectangular cover with frame of size-710x535mm and opening of size - 450 x 600mm

Dismantling old plaster or skirting raking out joints and cleaning the surface for plaster including disposal of rubbish to the dumping ground within 50 metres lead.

Cement plaster 1:3 (1 cement: 3 coarse sand) finished with a floating coat of neat cement.

20 mm cement plaster

Extra for providing and mixing water proofing material in cement plaster work in proportion recommended by the manufacturers.

Neat cement punning

Providing and applying a polymer modified cementitious coat (Nitocote CM210 of FOSROC or equivalent product approved for use in contact with potable water) in water tank on the concrete wall/base with roller /trowel to form impermeable coat for resisting negative /positive water pressure and bridging of fine cracks including throughly cleaning & washing the substrate before application, mixing the cementitious powder and polymer liquid in a proportion specified by manufacturer

Repairs to plaster of thickness 12 mm to 20 mm in patches of area 2.5 sq.meters and under, including cutting the patch in proper shape, raking out joints and preparing and plastering the surface of the walls with mixture of Rapid setting cement based, water leak plugging mortar (Renderoc plug of FOSROC or equivalent) and 25% fine grade M-Sand by volume complete, including disposal of rubbish to the dumping ground, all complete as per direction of Engineer-in-Charge.

Disposal of building rubbish / malba / similar unserviceable, dismantled or waste materials by mechanical means, including loading, transporting, unloading to approved municipal dumping ground or as approved by Engineer-in-charge, beyond 50 m initial lead, for all leads including all lifts involved.