Construction of 1 no 40m NBLW Ground Based tower foundation including DG set OD platform and ring earth in BSNL land at Gopalpur under Berhampur BA 2nd call

Sub-Head : Earth 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 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

Earth work in excavation by mechanical means (Hydraulic excavator) / manual means in foundation trenches or drains (not exceeding 1.5 m in width or 10 sqm on plan) including dressing of sides and ramming of bottoms, lift up to 1.5 m, including getting out the excavated soil and disposal of surplus excavated soil as directed, within a lead of 50 m.

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.

Close timbering over areas including strutting, shoring and packing cavities (wherever required) etc. complete. (Measurements to be taken of the face area timbered):

Depth exceeding 1.5 m but not exceeding 3 m

Depth exceeding 3 m but not exceeding 4.5 m

Excavating, supplying, stacking and filling of local earth (including royalty) by mechanical transport upto any lead & also including ramming and watering of the earth in layers not exceeding 20 cm in foundation trenches, plinth, sides of foundation etc. complete for all lift.

Sub-Head : Concrete Work

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)

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 (zone-III) derived from natural sources : 3 graded stone aggregate 20 mm nominal size derived from natural sources)

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 upto plinth level.

Thermo-Mechanically Treated bars of grade Fe-500D or more.

Smooth finishing of the exposed surface of R.C.C. work with 6 mm thick cement mortar 1:3 (1 Cement : 3 fine sand).

Sub-Head : Masonry Work

Brick work with common burnt clay F.P.S. (non modular) bricks of class designation5.0 in foundation and plinth in:

Cement mortar 1:6 (1 cement : 6 coarse sand)

Sub-Head : Steel Work

Structural steel work riveted, bolted or welded in built up sections, trusses and framed work, including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer all complete

Sub-Head : Finishing

12 mm cement plaster of mix :

1:6 (1 cement: 6 coarse sand)

Sub-Head : MARKET RATED ITEMS

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 at GOPALPUR, Berhampur. Rate includes sorting, labour charges in loading and unloading, safe handling etc all complete.

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.

Labour charges for arranging and fixing the anchor bolts of 32mm dia @ 9.00 nos in each column (Total 36 nos) including nuts and base plate etc. in position as per direction of Engineer-in-charge. (Templates and anchor bolts, nuts and washers will be supplied by the department)

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 1.0 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 1.0 ohms or less is to be carried 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).

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