Construction of storm water drainage system in Changlang township area.

Amount

I. Sub-Head : Drain

Earth work in excavation in foundation in saturated soil including pumping or bailing out of water and disposing of excavated earth within a lead up to 50 m lift up to 1.50 m

Providing and laying Dry stone soling i/c packing with smaller stones

Providing and laying cement concrete 1 : 4 : 8 (1 cement : 4 sand : 8 stone shingles 40 mm nominal size in foundation and plinth

Steel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete upto plinth level.

Reinforced cement concrete in walls (any thickness) including attached pilasters, buttresses, plinth and string course, fillets etc from top of foundation up to floor two level including finishing and plastering the exposed surfaces with cement mortar 1 : 3 (1 cement : 3 fine sand) of thickness not exceeding 6 mm to give a smooth and even surface excluding cost of centring,a) M20 (1 cement : 1.5 corase sand : 3 stone aggregate 20 mm nominal size) shuttering and reinforcement in :

Reinforced cement concrete work in suspended floor,roof,landing up to floor two level including finishing and plastering the exposed surface with cement mortar 1 : 3 (1 cement : 3 fine sand) of thickness not exceeding 6 mm to give a smooth and even surface but excluding cost of centering, shuttering and reinforcement.a) M20 (1 cement : 1.5 coarse sand : 3 stone aggregate 20 mm nominal size).

a) Centring and shuttering including strutting, propping etc and removal of formwork for :

b) Walls (any thickness) including attached pilasters, buttresses, plinth and string courses etc.

c) Suspended floors, roofs, landings shelves and their supports, balconies and chajjas (3.5 m height).

12 mm cement plaster 1 : 3 (1 cement : 3 fine sand).

Neat Cement punning

Re-filling excavated earth in foundations and plinth etc. in 15 cm layer including ramming and watering etc. complete.

II. Sub : Retaining Wall

Earth work in excavation in foundation and trenches in soils containing 50% or more of shingle or small size boulders upto 30 cm size, lift upto 1.50 m and stacking the excavated soil not more than 3 m clear from the edge of the excavation and returning the stacked soil in 15 cm layers when required, into plinth, sides of foundation etc consolidating each deposited layer by ramming and watering and then disposing of all surplus excavated soil as directed within a lead of 50m.

Providing and laying in foundations and plinth cement concrete 1 : 4 : 8 (1 cement : 4 coarse sand : 8 graded stone aggregate 40 mm nominal size) excluding the cost of centring and shuttering i/c Transportation of Material up to work site

Stone masonry work in cement mortar 1:3 in foundation complete as per drawing and Technical Specification i/c Transportation of Material up to work site

Back filling behind abutment, wing wall and return wall complete as per drawing and Technical specification (Granular material)

Providing weep holes in Reinforced concrete abutment, wing wall/return wall with 100 mm dia AC pipe,

III. Sub-Head : Dredging

Earth work in excavation in saturated soil upto a depth of 61 cm including pumping or bailing out water and banking in 20 cm layers for the purpose of making embankments or filling up ground depressions, lead upto 50 m and lift upto 1.50 m.

MAITUNG TIKHKA (BID ID -7000)