Construction of 40 M NBLW Ground based tower foundation ic. D.G. set Platform and Ring Earthing at MG Road, Jeypore in Koraput District.

Amount

Earth work in excavation by mechanical means (Hydraulic excavator) / manual means over areas (exceeding 30cm in depth, 1.5m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth, lead up to 50m and lift up to 1.5m,as directed by Engineer-in-Charge.

All kinds of soil

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.

Extra for every additional lift of 1.5 m or part thereof in excavation /banking excavated or stacked materials.

All kinds of soil.

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

1:5:10 (1 cement : 5 coarse sand(zone-III) derived from natural sources : 10 graded stone aggregate 40 mm nominal size derived from natural sources)

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

1:1.5:3 (1 cement : 1.5 coarse sand (zone-III): 3 graded stone aggregate 20 mm nominal size)

1:2:4 (1 cement : 2 coarse sand (zone-III) : 4 graded stone aggregate 20 mm nominal size)

Centering and shuttering including strutting, propping etc. and removal of form for :

Foundations, footings, bases of columns, etc. for mass concrete

Lintels, beams, plinth beams, girders, bressumers and cantilevers

Columns, Pillars, Piers, Abutments, Posts and Struts

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

Thermo-Mechanically Treated bars of grade 500 D or above

Smooth finishing of the exposed surface of RCC work with 6mm thick cement mortar 1:3 (1 Cement : 3 Fine sand)

Structural steel work in single section fixed with or without connecting plate including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer all complete:

Carriage of anchor bolts, templates, nuts guide angle and base plate as required as per direction of Engineer-in-charge from place of store at BHUBANESWAR to work site. Rate include sorting, labour charges in loading and unloading, safe handling etc all complete.

Labour charges for orienting and fixing assembly of 9 Nos-32mm dia anchor bolts in each of the 4 legs/ pedestals of tower with the help of template, base plate and other base arrangements. A total of 36 numbers anchor bolts shall be oriented and fixed for each tower as per drawings. Rate includes cost of necessary scaffolding arrangement etc., all complete as directed by the Engineer-in-charge. (Base plate and Anchor bolts and washers will be supplied by the Department).

Galvanising of MS high density tower anchor nuts,washers & bolts (36 nos top 0.20m length),etc. as per requirement all complete as per direction of Engineer-in-charge, for protecting against corrosion in coastal & extreme weather conditions area.

Providing and fixing ring earth consisting of specified and required ring size at site and laying of G.I. Flats of size 50 x 6 mm laid at the bottom of the tower foundation pit, one metre away from the tower base. The G.I. flats shall be connected with each other with G.I. nuts and bolts after placing lead strips/ lead wool of 90x50x1mm thick in between and with legs of tower with G.I. nuts and bolts with spring washers. All the joints shall be properly wrapped and sealed by water proof tape to avoid ingress of moisture. The G.I flats shall be covered with fine and cohesive good earth all around and duly compacted. The G.I. flats shall be bent in such a way that curves are smooth having radius not less than one metre. The rate shall be inclusive of all materials and labour including tools and plants, incidental cost etc. all complete and nothing extra shall be paid on any account except earthwork in excavation, filling available excavated earth or good earth brought from outside as the case may be. (Note: Payment shall be made only if the ohmic value of the earth resistance is 0.5 ohms or less. Security deposit for the whole work will be released only after completion of A/T Any rectification required to make earth resistance to 0.5 ohms or less is to be carrie out by the agency. If the A/T is not done in one year after completion of work 75% of S.D. will be released. Remaining part of S.D. will be released after completion of A/T).