siruseri 40 GBT erection

Cutting tree including trimming tree branches , trunks ( girth beyond 30cm)and derooting its roots and disposal from the site to the municipal dumping ground by mechanical transportation including loaing and unloading etc., complete and as directed by the Engineer-in-charge.

Clearing jungle including uprooting of rank vegetation, grass, brush wood, trees and saplings of girth up to 30 cm measured at a height of 1 m above ground level and removal of rubbish up to a distance of 50m outside the periphery of the area cleared.

Earth work in excavation by mechanical means (Hydraulic excavator)/manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth lead upto 50 m and lift upto 1.5 m, as directed by Engineer-in-charge.

All kinds of soil

Extra for every additional lift of 1.5 m or part thereof in excavation / banking excavated or stacked materials.

All kinds of soil

Filling available excavated earth (excluding rock) in trenches, plinth, sides of foundations etc in layers not exceeding 20 cm in depth, consolidating each deposited layer by ramming and watering, lead up to 50 metre and lift up to 1.5 metre.

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level :

a) 1:4:8 (1 cement : 4 M sand : 8 graded stone aggregate 40 mm nominal size)

Providing and laying in position ready mixed or site batched design mix cement concrete for reinforced cement concrete work; using coarse aggregate and fine aggregate derived from natural sources and using recycled concrete aggregate (RCA) as coarse aggregate and fine aggregate within permissible utilization of 20% each, Portland Pozzolana /Ordinary Portland/Portland Slag cement, admixtures in recommended proportions as per IS: 9103 to accelerate / retard setting of concrete, to improve durability and workability without impairing strength; including pumping of concrete to site of laying, curing, carriage for all leads; but excluding the cost of centering, shuttering, finishing and reinforcement as per direction of the engineer-in-charge; for the following grades of concrete. Note: Extra cement up to 10% of the minimum specified cement content in design mix shall be payable separately. In case the cement content in design mix is more than 110% of the specified minimum cement content, the contractor shall have discretion to either re-design the mix or bear the cost of extra cement. A) All works upto plinth level.

Concrete of M25 grade with minimm cement content of 330 kg /cum

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 M sand:3 graded stone aggregate 20mm nominal size)

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

Foundation, footings, bases of columns etc for mass concrete

Lintels, beams, plinth beams, girders, bressumers and cantilevers.

Columns, Pillars, 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

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

Segregation of required tower materials for 40M Narrow based GBT at store and derusting by soaking in kereosene, cleaning etc. all complete

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 galvanised steel bolts, nuts and washers of all required sizes for fastening the 40 M narrow based tower all complete as directed by the E-in-C

Transportation of tower ,gantry materials for 40M tower from the GSM stores at Perambur,Chennai to site by mechanical transport including loading, unloading and stacking as directed by the Engineer in charge.

Erection of four legged ground based ( light weight) 40 m high 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.)

Painting the 40 metre ground based tower, including ladder, cable tray, working platforms, etc. with Luxol or equivalent high gloss synthetic enamel paint in two or more coats of required colour to give an even shade over One coat of Etch primer and two coats of Zync phospahate 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.

Fixing available G.I. ladder / gantry work by assembling and fixing from the tower to shelter nearest points ceiling with necessary cleats , nuts and bolts etc., complete. The rate including transportation of ladder / gantry from Perambur stores to site including loading, unloading to terrace etc all complete as per the direction of Engineer-in-Charge.

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 25x3 mm GI strips with 2 Nos 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 25x3mm 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 ring earth including necessary provision for connecting earthing for aviation lamp including excavation of trench of size 500x1000mm depth and laying GI flats of size 50x3mm and jointing flats with plate earth vide relevant item above and jointing at corners with 2 Nos.of 10mm 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 as per the direction of the Engineer-in-charge.

Providing GI strips of size 25x3 mm one end connected to the lower leg with GI bolts and nuts including providing and connecting alround the four legs at the bottom of tower and the other end shall be connected to the plate earth pit /ring earth with GI bolts and nuts 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.

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 busbar to the lightening arrester using 2 Nos.10mm dia brass bolts and nuts all complete as directed by the Engineer-in-charge.

Providing and fixing 25X6 mmGI flat for connecting the lightening arrester to the plate earth. The GI flat shall be insulated with heat shrunk PVC sleeve and shall be fixed with tower member using suitable clamps in such a way flat shall no where directly contact the tower member all as directed by the Engineer-in-charge.

Supplying and fixing LED aviation obstruction lamp of Saraj, Binoy, aviades, Litten or equivalent with Light Dependent Resistant sensor (day and night authomatic timer) with necessary MCB switches, armoured cables(2x1.5 mm square copper cables), clamps etc, complete as per the direction of Engineer-in-charge.

Finishing walls with Acrylic Smooth exterior paint of required shade :

New work (Two or more coat applied @ 1.67 ltr/10 sqm over and including priming coat of exterioe primer paint applied @ 0.90 lit/ 10 sqm).

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