Construction of Integrated Science Lab at Chisang High School under Gorubathan Development Block in Kalimpong District

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 sides of trenches, levelling, dressing and ramming the bottom, bailing out water as required complete. a)Depth of excavation not exceeding 1500 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)

Single Brick flat soling of picked jhama bricks including ramming and dressing bed to proper level, and filling joints with powered earth or local sand.

(I) Cement concrete with graded stone ballast (40 mm size excluding shuttering) In ground floor (B) [N.B Variety] Stone Metal (a) 1:3:6 proportion

25mm. thick damp proof course with cement concrete with stone chips (1:1.5:3) [with graded stone aggregate 10 mm nominal size] and admixture of water proofing compound as per manufacturer's specification followed by two coat of polymer based paint, (1st coat after 4 to 5 days of concrete laying and 2 nd coat just before brick masonry work) as directed (cost of water proofing compound & polymer based paint to be paid separately).( Chequering not required over concrete or painted surface).

Brick work with 1st class bricks in cement mortar (1:6) (a) In foundation and plinth

Brick work with 1st class bricks in cement mortar (1:6) (b) In Super Structure, ground Floor

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. (i) Pakur Variety.

Hire and labour charges for shuttering with centering and necessary staging upto 4mm, using approved scout props and thick hard wood planks of approved thickness with required bracings for concrete slabs, columns, lintels, beams etc. curved or straight, including fitting, fixing and striking out after completion of works (upto roof of ground floor). a) 25 mm to 30 mm thick wooden shuttering as per decision and direction of the Engineer-in-Charge.

Reinforcement for reinforced concrete work in all sort of structures including distribution bars, stirrups, binders etc. including supply of rods, initial straightening and removal of loose rust (if necessary) cutting to requisite length, hooking and bending to correct shape, placking in proper position and binding with 16 gauge black annealed wire at every inter- section, complete as per drawing and direction.