Bharat Sanchar Nigam Limited Tender

Extra for every additional lift of 1.5 m or part thereof in excavation / banking excavated or stacked materials (a) All kinds of soil

(b) Ordinary or hard rock.

Excavating holes more than 0.10 cum & up to 0.5 cum including getting out the excavated soil, then returning the soil as required in layers not exceeding 20 cm in depth, including consolidating each deposited layer by ramming, watering etc, disposing of surplus excavated soil, as directed within a lead of 50 m and lift upto1.5 m. (a) 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 upto 1.5 m. (a) 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 (a)1:2:4 (1 cement : 2 coarse sand (zone-III) derived from natural sources : 4 graded stone aggregate 20 mm nominal size derived from natural sources)

(b) 1:4:8 (1 Cement : 4 coarse sand (zone-III) derived from natural sources : 8 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) 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 all heights : (a)Foundations, footings, bases of columns, etc. for mass concrete

(b) Walls (any thickness) including attached pilasters, butteresses, plinth and string courses etc.

(c) Lintels, beams, plinth beams, girders, bressumers and cantilevers

(d) 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.

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

Cement plaster 1:3 (1 cement: 3 coarse sand) finished with a floating coat of neat cement. (a) 12 mm cement plaster

Providing and fixing M.S. angle 40x40x5 mm to act as nosing with lugs of M.S. rod 10 mm dia 20 cm long forked at end 60cm apart including necessary welding and applying a priming coat of approved primer on exposed surface etc. complete.

Supplying at site Angle iron post & strut of required size including bottom to be split and bent at right angle in opposite direction for 10 cm length and drilling holes upto 10 mm dia. etc. complete.

Steel work welded in built up sections/ framed work, including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer using structural steel etc. as required. (a)In gratings, frames, guard bar, ladder, railings, brackets, gates and similar works.

Providing and fixing G.I. chain link fabric fencing of required width in mesh size 50x50 mm including strengthening with 2 mm dia wire or nuts, bolts and washers as required complete as per the direction of Engineer-in-charge. (a)Made of G.I. wire of dia 4 mm

Solid block masonry with precast machine moulded cement concrete solid block of size 300x200x150mm having minimum compressive strength of 35kg/sqcm and density not less than 1800kg/cum in cement concrete 1:5:10 ( 1 cement: 5 crused stone sand: 10 graded stone aggregate 12mm nominal size) with cement mortar 1:6 (1 cement:6 coarse sand) including scaffolding, racking out joints and filling joints with cement mortar, finishing neatly etc. upto plinth level.all complete as per the direction of Engineer-in-charge

Dismantling steel work in built up sections in angles, tees, flats and channels including all gusset plates, bolts, nuts, cutting rivets, welding etc. including dismembering and stacking within 50 metres lead.

Extra for marking of structural steel work required to be re-erected.

Demolishing R.C.C. work manually/ by mechanical means including stacking of steel bars and disposal of unserviceable material within 50 metres lead as per direction of Engineer - in- charge.

Transportation of tower materials by mechanical transport including loading ,unloading charges and all incidental charges etc. complete from Muttuchira [RP 03264] GBT location to site at Staff quarters compound, Pala and stacking of material at the proposed tower site all complete.

Supply of missing tower materials conforming to ISRC Specifications using MS hot dipped galvanized angle sections conforming to specification attached to the respective towers including ladder, working platform, antenna fixtures, GI Nut and bolts etc. MS angles of Yst 22/210 grade and conforming to IS 1161 etc. complete

Erection of tower including assembling the Structural Members of the Tower ,tightly connecting with GI nuts, bolts ,plate washers ,ring washers etc. including making use of necessary hoisting / climbing arrangements , safety belts and all necessary precautionary measures to safeguard the building , working labours and general public etc. to form the Finished Tower to Conform the Standard Drawings /Design/Alignment etc. complete i) Rate includes cost of all operations involved in hoisting and erection of tower including hire charges of tools, plants and machineries etc. and is inclusive of cost of all type of labours including skilled, unskilled, highly skilled labours, technicians etc. with insurance premium of all the workers employed by the agency and also includes straightening of any bent tower materials, matching holes of members/gusset plates and nothing extra will be paid on any account whatsoever. ii) The erected tower will have to meet the tower erection standards of the department and any deficiency/ discrepancy/ deviation in erected tower pointed out by the testing authority during acceptance testing (A/T) of the same, will have to be rectified.(a) 40m Tower

Supplying and Fixing Mild Steel Anchor Bolts of Required Diameter and Length ( Diameter Varying from 16mm to 32mm ) for Tower Foundation including Making Steel Templates with Necessary Holes to suit the Diameter of the Anchor Bolts including Mechanical threading to the top 15 centimeter length of Bolts , welding with necessary MS Plates at the bottom of independent anchor bolts ,etc. complete .The Anchor Bolts and Template shall be fixed to line and Level keeping the Centre to Centre Distance in tact ,inside the Centring and shuttering of the Tower Beams Before doing concreting of Tower Foundation .( The Rate includes the cost of all Labour involved in the above process of operation inclusive Materials ,Transportation and Fixing Charges and Nothing Extra shall be Paid )

Painting of tower (Light / Heavy weight)including ladder, antenna mounts, cable trays, gantry etc. as per the following operations: a) Cleaning of the tower to get rid of peeled off paint, dust, rusting, dirt etc. by sand paper and finally with a clean cloth. b) Over the cleaned surface of tower a coat of Etch primer [which consists of polyvinyl butyral phosphoric acid catalyst and zinc chromate base and are supplied separately. They should be mixed before use in the specified ratio as specified by the manufacturer] shall be applied uniformly. c) Over the etch primer coat, one coat of zinc chromate primer of approved brand and manufacturer shall be applied. d) Finally two coats of enamel paint shall be applied as per aviation guidelines and ad per the directions of Engineer-in-charge. [paint / primer used shall be of reputed manufactures like Asian/Shalimar/Berger ].Each item of work from (a) to (d) shall be done after the inspection of the BSNL officer . (a) 40m Tower

Providing GI plate earth including excavation of pit of size 2000x2000x3000mm depth in all kinds of soils and placing four numbers of G I plates of size 600x600x6 mm thick vertically at diagonally opposite ends in the excavated pit and inter connecting the plates with 4 Nos. of 50x3mm G I strips with 2 no.s of G I bolts and nuts of 10mm dia at each connection and covering the joints with bitumen, placing G I pipe of 50mm internal dia ( B Class) and 3000mm length at the center of the plate grid for watering and filling the pit with fine ash and / or finally sieved good quality soil including ramming in 20 cm layers etc. complete and cover the pit with 750x750x50mm thick precast reinforced cement concrete slab having 100mm dia hole at the centre to pass the GI pipe and construct a chamber having:(a) Internal size not less than 280x280x250mm with half brick wall including fixing CI manhole cover of size 300x300mm of weight not less than 7.20 Kg. (cover & frame) and plastering the chamber on all sides with cement mortar 1:4 of 12mm thick (1 cement : 4 fine sand) and including disposal of surplus excavated earth if any within a distance of 5 Km lead as directed by the Engineer-in-Charge.

Providing ring earth including necessary provision for connecting earthing for aviation lamp including excavation of trench of size 500 x 1000 mm depth and laying GI flats of size 50 x 3 mm and jointing flats with plate earth vide item No.16 above and jointing at corners with 2.Nos. of 10 mm dia GI bolts and nuts with necessary spring washers and refilling the trenches with the excavated soil free from stones and disposal of surplus soil within 5 km lead as per the direction of the Engineer-in-charge.

Providing G I strips of size 50x3 mm one end connected to the tower leg with G I bolts and nuts [with lead sheath in between] including providing and connecting the legs at the bottom of tower and the other end shall be connected to the G I plate earth/ring earth with G I bolts and nuts [with lead sheath in between] including clamping the down lead flat to walls/stems without any sharp bends using necessary clamps and screws as directed by the Engineer-in-Charge. (All joints should be covered by Shalimar or equivalent water proof tape and made air tight)

Providing and fixing copper lightning conductor of 1500mm length, 25mm dia hollow tube of wall thickness not less than 1.6mm including tinning the bottom portion of the spike for a length not less than 150 mm (lightning conductor to be fixed at the top of the tower) and connecting the GI bus bar to the lightning arrester using 2 Nos. 10 mm dia brass bolts and nuts all complete as directed by the Engineer-in-charge. (All joints should be covered by Shalimar or equivalent water proof tape and made air tight)

Providing GI bus bar of 50 x 3 mm connected to the tinned bottom portion of lightning conductor and to the ring earth/plate earth with 2 no.s of 10 mm dia GI nuts & bolts [with lead sheath in between] at each connection. The bus bar shall be drawn through heat shrink sleeve and shall be shrunk properly. The bus bar shall be clamped to the tower/ building walls at uniform interval of 1.5 Mt.. using proper GI clamps and ceramic insulators such that the bus bar shall be well insulated from the tower building walls all complete as directed by the Engineer-in-charge. (All joints should be covered by Shalimar or equivalent water proof tape and made air tight)

Finishing walls with Acrylic Smooth exterior paint of required shade : (a)New work (Two or more coat applied @ 1.67 ltr/10 sqm over and including priming coat of exterior primer applied @ 2.20 kg/10 sqm).

Painting with synthetic enamel paint of approved brand and manufacture to give an even shade : (a) Two or more coats on new work.