Bharat Sanchar Nigam Limited Tender

Notes : The item includes the following & nothing extra shall be paid on this account. (1) The necessary safety precaution to protect the human lives, insurance coverage to the labours etc. shall be sole responsibility of the agency. (2) Necessary tools and plants, equipments, machinary etc. required for the work as well as safety measures as per the relevant IS codes. (3) The agency should take every precaution against damage to the nearby structures while dismantling the tower etc. Any slackness in this regard shall be sole responsiblity of the agency. (a) 40 metre heigh ground base NB tower

Shifting / Transportation of all tower materials and other allied fixtures like tower foundation bolts, templates, all the structural members of tower, ladder and safety cage material including clamps etc. wave guide rack materials, nuts, bolts and washers etc. shall be tranported by maintaining the safety precautions to avoid any damage.

(a) Transporting up to a distance of 20 Kms. Including loading, unloading, stacking etc. all complete as per direction of Engineer-in-charge.

(b) Extra for additional distance beyond 20 Kms. Lead for transportation of Tower material by mechanical transport.

Erection of ground based self supporting tower (of any height) using new / old / recovered / dismantled tower material as available at site. The work shall include the following.

(a) Erection of tower including sorting, assembling, lifting, fitting and fixing up all tower members in position true to the alignment including assembling / hoisting / fixing of ladder, working paltform, wave guide rack, lightening arrestor, lightening arrestor pipe stand etc. at required level all complete as per manufacturer's drawing and as per direction of Engineer-in-charge. The item includes enlarging holes, straightening of twisted or bend tower members of any type etc. and all other connected works for the above operation (if any and as required) all complete as per the direction of Engineer-in-charge. (This operation is only for labour charges for erection of tower and approximate weight of tower is 10 (ten) Tonne.

NOTES : (1) The items includes for the following and nothing extra shall be paid on this account. (a) The agency shall take every precautions against the damages to the structure or nearby structures while erecting the tower. (b) Necessary safety precaution to protect the human lives, insurance coverage to the sole responsibility of the agency. (c) Item includes for all operations, tools and plants, equipments, machinary etc. required for the work as well as safety measures as per the relevant IS codes.(2) The items does not include for the dome lights and its system and earthing system for tower. These shall be paid under separate items, if and as required.(3) The items does not include the supply of tower material / dismantling of old tower and its transportation. These shall be paid under separate items, if and as required.

(b) Painting with two or more coats of synthetic enamel paints of approved colour shade and approved brand and manufacturer to give an even shade as per Aviation requirements over a coat of zinc chromate yellow primer all complete as per direction of Engineer-in-charge. Agency shall arrange for all the materials, labour, T & P etc. as required.

Supplying (at site) of deficient steel materials for tower on account of any shortage / unserviceable material found on dismantling of tower or otherwise. The material required for tower, its ladder, working platform, wave guide rack (vertical), antenna fixtures, pipe stand for lightening arrestor, nuts & bolts, washers, templates, base plates etc. as required shall be provided in required sectional size and length including drilling holes for bolts etc. all conformity with the approved drawings of S.E.R.C.and as per the directions of Engineer-in-charge and shall be made out of pure virgin structural steel of approved companies viz. SAIL, TISCO, RINL etc.

Notes : (1) All tower material to be hot dip galvanised. The tower material, fabrication & galvanising shall be as per the relevant IS code as well as S.E.R.C. recommendations. (2) This item does not include erection, priming and painting of the tower which shall be measured and paid under the separate item.(3) Measurement : Weight of all the material supplied (weight of each piece in exact length as required as per drawing) including weight of nuts / bolts & washers shall be measured for payment. (4) The rate includes cost of all material, their carriage, octroi etc. as well as labour and T & P necessary for straightening, cutting, filing, drilling etc. and hot dipped galvanising to all steel members.

Extra for providing single spike solid copper lightening arrestor of 650 mm length, 12 mm dia. having necessary threads & brass nut at bottom end of the rod and connecting the tin coated copper wire (IS marked) of gauge 7/20 from lower end of the lightening arrestor to the lug with 4 hole provided at 0.50 m below the top of the tower by 10 mm dia. brass nuts, bolts & washers etc. all complete and as per the direction of Engineer-in-charge. (1) The rate includes for all the materials and labour required for item as above except fixing of pipe stand which shall be paid seperately in relevent item.

Providing, laying and testing of Ring Earth system consisting of the following. (Earth resistance shall be below 2.0 ohms).

(a) Excavating 0.50 m x 1.00 to 1.50 m deep trench minimum 1.00 m away from the outer edge of foundation columns including dressing of sides and raming of bottoms, lift up to 1.50 m including getting out the excavated soil filling trench with charcoal and available excavated earth, salt etc. as per standard earthing specifications and disposal of surplace excavated soil as directed within a lead of 50 m. (i) All kinds of soil.

(b) Providing and laying G.I. earthing strip of size 50 x 6 mm (having 6 mm dia. holes at 1 m c/c along the length) inside the ring earth trench, horizontaly towards all the four tower legs and vertically upwards to connect with the gusset plate of first joint of all the four legs. The jointing of the two G.I. strips as well as joint in between G.I. strip and gusset plate of tower leg shall be done with an overlap of 90 mm, sandwitching in between a lead sheet of size 90 x 50 x 1 mm and bolted with 2 Nos. of 10 mm dia. G.I. nuts / bolts & spring washers. The jointing between the G.I. strips shall further the protected / sealed by wrapping properly with ISI marked 2" wide water proof tape. Notes : (1) While laying the G.I. strips, they should not be bent sharply at right angles but should be laid in smooth curves of about 1 m radius. (2) The rate includes for all the materials and labour required for all the above including lead sheet, water proof tape etc. (3) Measurement : Only the net length of G.I. strip shall be measured for payment. Nothing extra shall be paid for overlapping length etc.

Providing parts of aviation light as necessary so as to satisfy aviation requirements.

(a) Supplying, installing, testing & comissioning of Single dome Aviation obstruction light (AOL) fixture having base made of aluminium die cast / fibre body and top cover of red polycarbonate dome & 230 V AC LED Aviation obstruction lamp with 300 & more Nos. clear LED's having light intensity of minimum 1200 LUX & necessary auto on-off scanner photo cell unit with tranformer in built in dome light of make from Vijay, Binoy, Altrox or equivalent etc. with necessary clamp for fixing arrangement etc. all complete as per the direction of Engineer-in-charge. The rate includes for all the materials, labour and T & P etc. required for all the works as mentioned above.

(b) Providing and fixing MCB of range 6-32 Amp of Havells, Merlin Gerin or equivalent make.

(c) Providing and fixing PVC double insulated 2 core x 1.5 Sq.mm. copper conducter / unarmoured power cable (Finolax, Polycab or equivalent) including removing damaged power cable and encasing new power cable in existing PVC conduit pipe.

(d) Providing and fixing PVC condute pipe of 20 mm dia. of approved brand and manufacture all complete as per direction of Engineer -In-Charge.

Tack welding at site all nuts with bolts including foundation bolts up to a height of 2.50 m from base plates using electric welding plant including cost of transportation of the welding plant all complete as directed by Engineer-in-charge.

Credit for the old material obtained from dismantling and demolishing as on where is basis.(a) Corroded reinforcement & MS sections.

Note: Quantity shown in above item is a credit to work item. Positive rate quoted by agency shall automatically calculate amount credited to work in lieu of dismantled material to be taken away by contractor.