Erection of RTT at Kunchippally

Amount

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.

Anchoring Reinforcement bars of 12mm to 32mm dia to existing RCC Structural Members with approved High strength Epoxy Adhesive to Provide Strength to the New structure including columns, Beams, Slabs and Footings etc. consisting of the Following operations

i) Core Drilling using Power Drilling Tool to a depth upto 25cm including Driving the tool and removing the Debris ,dust by vacuum cleaner and preparing the Anchor Hole ready and clean for the Application of Chemical (ii) Applying" HILTI HIT RE-500" or Equivalent High Strength Injectable Mortar ( An Epoxy adhesive of Two compounds ) in equal proportions with the Application Gun to the Full length of the Anchor Hole (iii) Inserting the Reinforcement Bars to the Anchor Hole in such a way to ensure that the tip of Reinforcement bar shall be met with the concrete end /reinforcement and bonded with the Applied Chemical and to the peripheral Concrete Surface and till the surplus Chemical Comes out of the Anchor Hole to ensure that the Anchor Hole is Void Free. (iv) Leaving the Anchor Reinforcement free for 10Minutes without shaking /pulling in/Pulling out till the Anchor rod is completely Bonded with the core periphery. The work shall be carried out as per the Directions of the Engineer-in-charge.(The rate is inclusive of all material and Labour involved in the above operation and nothing extra shall be paid except reinforcement which will be measured under relevant item)

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

Centring 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 cantilever

Columns, pedestals, piers, abutments, posts and struts

Reinforcement for reinforced cement concrete works including straightening, cutting, bending, binding and placing in position all complete:-

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

Smooth finishing of the exposed surfaces of reinforced cement concrete work with 6 mm thick cement mortar 1 : 3 ( 1 cement : 3 M sand ).

Painting with synthetic enamel paint of approved brand and manufacture to give an even shade :

Two or more coats on new work

Providing and fixing precoated galvanized iron profile sheets (size, shape and pitch of corrugation as approved by Engineer-in-charge) 0.50 mm ( + 0.05 %), total coated thickness with zinc coating 120 gm per sqm as per IS:277 in 240 mpa steel grade, 5-7 microns epoxy primer on both side of the sheet and polyester top coat 15-18 microns. Sheet should have protective guard film of 25 microns minimum to avoid scratches during transportation and should be supplied in single length upto 12metre or as desired by Engineer-in-charge. The sheet shall be fixed using self drilling /self tapping screws of size (5.5x 55mm) with EPDM seal, complete upto any pitch in horizontal/ vertical or curved surfaces excluding the cost of purlins, rafters and trusses and including cutting to size and shape wherever required.

Providing and fixing precoated galvanized steel sheet roofing accessories 0.50 mm (+ 0.05 %) total coated thickness, Zinc coating 120 gm per sqm as per IS: 277 in 240 mpa steel grade, 5-7 microns epoxy primer on both side of the sheet and polyester top coat 15-18 microns using self drilling/ self tapping screws complete :

Ridges plain (500 - 600mm).

Steel work in built up tubular (round, square or rectangular hollow tubes etc.) trusses etc., including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer, including welding and bolted with special shaped washers etc. complete.

Hot finished welded type tubes

Fixing Foundation bolts / anchor bolts to templates etc. for tower, in systems of tower foundation including accurate alignment, leveling etc. complete as per the direction of Engineer-in-charge (Anchor bolts along with templates will be supplied free of cost and the rate in this item is only for fixing up to 12 Nos of bolts in one stem/column) in position in the columns before putting concrete as per the requirement.

Supplying new Galvanized iron bolts, nuts and washers for fastening the 40 M narrow based tower (for missing bolts, nuts etc.)

Transportation of tower / gantry materials for 24M Roof Top tower materials from the BSNL stores at Malaparamba stores under Calicut BA to site by mechanical transport including loading, unloading and stacking etc. complete as directed by the Engineer in charge. (The distance for transportation is approximately 65 km)

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.

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.

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.

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 GI plate earth including excavation of pit of size 1500x1500x 3000mm depth in all kinds of soil and placing four numbers of GI plates of size 600x600x6 mm thick vertically at diagonally opposite ends in the excavated pit and inter connect the plates with 50x3 mm GI strips with 2 no.s of GI bolts and nuts of 10mm dia at each connection and placing galvanized iron pipe of 50mm dia and 3000mm length at the centre of the GI plate grid and interconnect the pipe at minimum two sides with connecting flat of the GI plates with GI flat of size 50x3mm with GI bolts and nuts and fill the pit up to a depth of 650mm with charcoal of 20mm nominal size and the remaining portion of pit shall be filled with loose soil free from stones and wet the entire soil with water and providing precast RCC rings 300mm dia 450mm height and 50mm thick with reinforcements and cover slab of 300mm dia 50mm thick for earth chamber etc. and levelling the surplus excavated earth as directed by the Engineer in Charge.

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)

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 centimetre 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 )

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.