Bharat Sanchar Nigam Limited Tender

Reinforced cement concrete work in beams, suspended floors, roofs having slope up to 15° landings, balconies, shelves, chajjas, lintels, bands, plain window sills, staircases and spiral stair cases above plinth level up to floor five level, excluding the cost of centering, shuttering, finishing and reinforcement with 1:1.5:3 (1 cement : 1.5 coarse sand(zone-III)derived from natural sources : 3 graded stone aggregate 20 mm nominal sizederived from natural sources).

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

Suspended floors, roofs, landings, balconies and access platform

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 above 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).

Labour for hoisting, fixing and erection of 9m MARR mast ( 3 segments of 3m appx) with all its necessary components, fixing with bolts, nuts and spring washers, necessary welding etc.wherever required complete in all respect as per direction of the Engineer - in - charge.(NOTE: Rate includes cost of all operations involved in hoisting and erection of tower including hire and labour charges of tools, plants and machineries and nothing will be paid extra).

Providing earthing with 4 nos. copper earth plate of size 600x600x3 mm thick placed vertically in the excavated pit of size 2000x2000x3000 mm . The plate shall be interconnected with 50x6 mm G.I. Strip. The assembling shall be connected to ring earth by 50x6 mm G.I. Strip. The strips shall be taken through 20 mm CPVC G.I.pipe. The bolts, nuts, check nuts and washer shall be of copper. The pits is filled with char coal and salt up to a depth of 900 mm, remaining portion shall be filled with good quality black soil without stones. The brick masonry chamber shall be provided at ground level of size 300x300x300 mm with a hole in the middle to pass the CPVC. pipe of 20 mm dia with a provision for funnel and CI cover with C.I.frame. The funnel shall be fixed with wire mesh.The manhole cover shall be painted and marked with the value of earth resistance including measurement of earth resistance by earth megger etc. complete as per direction of the Engineer-in-charge. The value of earth resistance should be less than 0.50 Ohm and nothing extra shall be paid for getting earth resistance less than 0.50 ohm.

Providing and fixing copper spike type lightening arrester made of 10mm OD copper pipe with 10 mm ISRO bar copper fitted to 120 degree rod size 5mm with necessary fixtures at the top of tower. The spike shall be insulated from tower by teflon materials. The pipe shall be connected to copper plate earthing by 50*3mm GI flat with proper fixing arrangement as directed by the Engineer-in-charge (The GI flat shall be paid for separately).

Providing and fixing 50 x 3 mm GI strip from the top of the tower ,one end of the strip connected to copper spike lightening arrestor ,and another end left free after making necessary holes at ground levels for connection to plate earthing at a later stage complete as per direction of Engineer-in -charge.