RTT Thiruvankulam

Amount

Welding by gas or electric plant including transportation of plant at site etc. complete

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) : 3 graded stone aggregate 20 mm nominal size).

Reinforced cement concrete work in walls (any thickness), including attached pilasters, buttresses, plinth and string courses, fillets, columns, pillars, piers, abutments, posts and struts etc. above plinth level up to floor five level, excluding cost of centering, shuttering, finishing and reinforcement :

1:1.5:3 ( 1 cement : 1.5 coarse sand : 3 graded stone aggregate 20 mm nominal size)

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

Lintels, beams, plinth beams, girders.

Columns, pillars, piers, abutments, posts and struts

Suspended floors, roofs, landings, balconies and access platform

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).

Placing of anchor bolts in sets corresponding to the requirement of tower erection including all labours and handling charges and checking with template issued from BSNL in line , level, plumb etc. as per direction of Engineer - in- charge. complete.

Demolishing RCC tower foundation structure at level up to floor three level manually/ by mechanical means including stacking of steel bars, disposal of building debris including lifting down from floor three level to ground level , loading , mechanical transportation and unloading at approved dumping ground within a lead of 10 km as per direction of Engineer - in- charge.

Finishing with Epoxy paint (two or more coats) at all locations prepared and applied as per manufacturer’s specifications including appropriate priming coat, preparation of surface, etc. complete.

On concrete work

Dismantling with care superstructure of three legged communication tower (upto 24 Mtr height roof top tower ) including dismembering Structural sections of the tower viz. angles, flats, channels, gusset plate, base plate, bolts, nuts, ladder, working platform, cable tray, antenna fixtures, lightning arrestor , all cables of diameter up to 50mm dia, BTS ,DG, Battery sets ,PP rack etc. from roof top to ground floor building etc. and stacking within 50 Mtr lead etc., complete as directed by the Engineer - in Charge. (The rate shall be inclusive of cost of providing safety measures, insurance charges and all labour involved in the operation including hire charges and mobilization charges of tools and plants etc. and nothing extra shall be paid on any account.)

Supplying 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 Centering 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 )

Steel work for making template of tower base for future installation with MS plate and angle sections including making necessary holes providing with nuts and bolts etc. complete as per the direction of Engineer in charge.

Transportation of tower materials by mechanical transport from RP-04542-RailwayStnTPRA site to roof top terrace TE building at Thiruvankulam (Approx. 5 km) including lifting down from second floor level to ground level ,transporting to TE building Thiruvankulam, loading, unloading ,sorting and stacking etc. complete.

18metre roof top tower

Erection of four legged 24 m high RTT communication tower after segregation/sorting of the tower materials as per erection drawings Tower materials will be supplied free of cost at specified place and transportation will be paid as per item No.13.

Providing and fixing in position structural steel work with galvanized steel sections - tees, angles, flats, channels including bolts, nuts of specified grade etc. welded in built up sections/frames etc. including cutting, making holes, hoisting, fixing in position etc. all complete.

Re-Painting the 24 metre RTT, including ladder, cable tray, working platforms, etc. ,after scrapping the old paint surface by sand papering, with Luxol or equivalent high gloss synthetic enamel paint in two or more coats of required colour of deep orange and white in alternate bands to give an even shade over One coat of Etch primer and Zinc chromate yellow primer as per aviation standards for tower as directed by Engineer-in-charge.

Supply of maintenance free earthing system consisting of UL listed copper bonded steel electrode with minimum 254 micron copper coating all through with ground enhancement material(GEM) tested for leaching & TCLP as per IEC62561-7 with heavy duty inspection pit with green cover made on polyamide material which can handle minimum 5 ton static load. The systems shall be conforming to IS3043,lS/IEC 62305, IEC 61643-5-54,UL467 and the rod tested for dimension, marking, tensile strength, salt mist, coating thickness, electrical resistivity test before and after corrosion test etc. as per IEC 62561-2. Each set shall consists of following BOM (1) 17.2mm dia,3metre rod, minimum 254 micron copper bonding steel electrode-1No. (2) Ground enhancement material of 22Kg-(2bagof11.3Kg/each) (3)Earth inspection pit with green cover having a minimum load bearing capacity of 5 ton static load.

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 150mm (lightning conductor to be fixed at the top of the tower) and connecting the copper bus bar to the lightening arrester using 2 Nos.10mm dia brass bolts and nuts all complete as directed by the Engineer-in-charge.

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)

Providing and fixing PVC pipes of pressure class of 4 Kg/Sq.cm complete fittings and clamps including cutting and making good the walls etc. complete

63 mm outer dia

Credit for usable steel reinforcement obtained from demolition of Reinforced Cement Concrete structural members.