Construction work for extension of Control Room Building at Gourhati 33/11 kV sub-station under Arambagh Division, WBSEDCL

Earth work in excavation of foundation trenches or drains, in all sorts of soil (including mixed soil but excluding laterite or sandstone) including removing, spreading or stacking the spoils within a lead of 75 m. as directed. The item includes necessary trimming the trenches, levelling, dressing and ramming the bottom, bailing out water as required complete.(a) Depth of excavation not exceeding 1,500 mm.

Earth work in filling in foundation trenches or plinth with good earth, in layers not exceeding 150 mm. including watering and ramming etc. layer by layer complete. (Payment to be made on the basis of measurement of finished quantity of work)(a) With earth obtained from excavation of foundation.

Filling in foundation or plinth by fine sand in layers not exceeding 150 mm as directed and consolidating the same by thorough saturation with water, ramming complete including the cost of supply of sand. (payment to be made on measurement of finished quantity)

(a) Depth upto 1.5 m.

(b) For additional depth beyond 1.5 m. and upto 3.00 m

Single Brick Flat Soling of picked jhama bricks including ramming and dressing bed to proper level and filling joints with local sand.

Cement concrete with graded stone ballast (40 mm size excluding shuttering). In ground floor and foundation.(A) Pakur Variety. (a) 6:3:1 proportion

Ordinary Cement concrete (mix 1:1.5:3) with graded stone chips(20 mm.nominal size) excluding shuttering and reinforcement, if any, in ground floor as per relevant IS codes.a) Pakur Variety i) In ground floor and foundation.

Ordinary Cement concrete (mix 1:2:4) with graded stone chips (20 mm.nominalsize) excluding shuttering and reinforcement, if any, in ground floor as per relevant IS codes. a) Pakur Variety. i) In ground floor and foundation.