Construction of 2nos. 40 M NBLW Ground based tower foundation including D.G. Set Platform and Ring Earthing under Bhubaneswar SSA.

Amount

Laying and Jointing PVC Pipe. Heading

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 disposal of excavated earth, lead up to 50m and lift up to 1.5m,disposed earth to be levelled and neatly dressed.

All kinds of soil

Extra for excavating in Ordinary Rock over and above the rate quoted for Item 1-(a) all kinds of soil .

Filling available excavated earth (excluding rock) / stacked good earth 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.

Extra for Ordinary or hard rock over & above the rate quoted for item -3(a) for all kinds of soil.

Sub-Head : Concrete Work

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 disposal of excavated earth, lead up to 50m and lift up to 1.5m,disposed earth to be levelled and neatly dressed.

1:5:10 (1 cement : 5 coarse sand : 10 graded stone aggregate 40 mm nominal size)

Sub-Head : Reinforced Cement Concrete

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 : 3 graded stone aggregate 20 mm nominal size)

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

Sub-Head : Concrete Work

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

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

Sub-Head :Steel Work

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:

Sub-Head : Miscellaneous-

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 arranging and fixing the anchor bolts of 32mm dia @ 9.00 nos in each column(Total 36 nos) i/c nuts and base plate etc. in position as per direction of Engineer-in-charge .(Tem plates and anchor bolts,nuts 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.

Credit to the agency for recovered templates, nuts and guide angles after fixing of anchor bolts.

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/TAny 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).