Civil Works

Amount

Earth work in excavation by mechanical means (Hydraulic excavator) / manual means over areas (exceeding 30 cm in depth, 1.5m in width as well as 10 sqm on plan) including disposal of excavated earth, lead up to 50m and lift up to 1.5m, disposed earth to be levelled and neatly dressed :

All kinds of soil.

Earth work in excavation by mechanical means (Hydraulic excavator) / manual means over areas (exceeding 30 cm in depth, 1.5m in width as well as 10 sqm on plan) including disposal of excavated earth, lead up to 50m and lift up to 1.5m, disposed earth to be levelled and neatly dressed :

Ordinary rock

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, watering, lead up to 50m and lift up to 1.5 m.

Extra for every additional lift of 1.5 m or part thereof in :

All kinds of soil.

Ordinary rock

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

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)

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 centring, shuttering, finishing and reinforcement - All work upto 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)

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

Foundations, 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 R.C.C. work including straightening, cutting, bending, placing in position and binding all complete.

Thermo-Mechanically Treated bars.

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

Structural steel work riveted, bolted or welded in built up sections, trusses and framed work, including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer all complete.( Item will be operated for Horizontal Gantry etc., )

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 exterior primer applied @ 2.20 kg/10 sqm).

Labour charges for fixing anchor bolts using templates during laying stem concrete including levelling and fixing properly as directed by the Engineer-in- charge. (Rate excluding the cost of anchor bolts) using proper templates.

Supplying high tensile strength fasteners consisting of galvanised iron nuts, washers and spring washers of varying sizes at appropriate locations as directed by the Engineer in charge. (Item is meant for supplying missing bolts & nuts in the tower material supplied by the department fixing will be charged under erection of tower item. )

Providing & placing in earth pit (of size 2.00 m x2.00mx3.0 m) in position prefabricated structure made up of 4 nos of GI plates of size 600mm x 600mm x 6mm interconnected by GI flat of size 50mm x 3mm with and with lead sheath between GI plates and flats and nuts and joints being made moisture proof necessary GI bolts providing and placing in position watering pipe of 20mm dia GI pipe of length 3.0 m with funnel at top including filling finely sieved good soil for earth pit size of 2.0m x 2.0m upto a height of 1.5m from the bottom as per specification for earthing, brick masonry chamber of size 300x300x300mm with CI cover and as directed by the Engineer-in-charge. (The galvanising shall be as per IS 4759 with average mass of zinc coating of 610gm/sqm, i.e. approximately 85 micron. The GI flat to be paid for separately)

Providing and laying ring earth by excavating trenches of 300 mm width and 1500 mm deep and at bottom of the then laying GI strip of 50x3 mm at the bottom of the trench and connecting it to all the tower legs with GI strip of 50 mx3 mm with GI bolt and nuts and also making provision for connecting ring earth to lightning spike by providing 50x3 mm GI strip one end of which is connected to the ring earth by means of GI bolts and nuts and other end left free above and refilling etc complete as directed by Engineer-in-charge.

Providing and fixing GI strip of size 50 x 3 mm with necessary GI clamps at every 1.50m, interval with Porcelain insulator, bolts, nuts, screws, etc.along with vertical runway including connecting with lightning spike at top of tower and earth at ground without overlap joint etc., complete as directed by the Engineer-in-charge. The rate includes all required materials, labours

Providing and fixing testing joint, made of 50 x 6 mm GI strip, 250mm long with 6 Nos of GI bolts, nuts, check nuts and washers etc., complete as directed by Engineer-in-charge.

Providing and fixing spike type lightening arrester made of 25mm dia hollow copper pipe of wall thickness 1.60mm and required length with necessary fixtures at top of the tower. The spike shall be insulated by Teflon material and connected to GI plate earthing by GI flat 50 x 3mm with proper lugging arrangement as directed by the Engineer-in-charge. (Cost of G.I. Flat of 50 x 3 mm shall be paid separately).

Transportation of tower materials, anchor bolts etc weighing approximately 9.00MT from Telecom store godown at Thuvakudi, Trichy BA to the worksite at Trichy including loading & unloading and lifting of tower materials as directed by the Engineer-in-charge.

Erection of four legged ground based angular light weight communication tower of 40 m height ( Approximate weight of 8500.00 Kgs ) using available M.S hot dipped galvanised sections , including sorting, lifting, assembling, fitting and fixing up all tower members in position true to alignment , including hoisting and bolting with necessary bolts, nuts and washers , fixing of ladder, working platform, cable guide rack, pipes and for lightning arrestor at required level all complete as per the directions of the Engineer in charge , including providiing necessary safety precautions to protect human lives and structures nearby during the course of erection , insurance coverage to labourers and including all tools, plants , equipments , machinery required for works as per relevant I.S codes and specifications as directed by Engineer-in-charge (Proof of the Insurance coverage is to be submitted failing which Rs 10000/- will be deducted in the bill )

Painting of 40M Tower ( Approximate weight of Tower is 8500.00 Kgs ) with LUXOL High gloss synthetic enamel paint or equivalent in two or more coats over and including a base coats of etching primer (BISON wash primer or equivalent) and BISON HB Zinc Phosphate primer or equivalent to required shade with the colours of White and International Orange bands alternatively as directed by the Engineer-in-charge. (The Rate is inclusive of cleaning the surface of the structural members free of all rust, scales, grease and dirt, safety arrangements, lifting of painting materials to the required height upto 40 m from the base of the tower and Insurance coverage to labour and Materials .

Supplying and fixing LED aviation obstruction lamp of insta power/ GELTRONIX/ MICROTECH or equivalent of approved make as per ICAO norms with light dependent resistance sensor (Day light automatic timer) with necessary power cable , switch including fixtures all complete as directed by the Engineer in charge.

Single dome low intensity flashing Red obstacle lighting syatem -Type B mounted at 40 metres height.

Making opening area upto 0.25 sqm in brick masonry wall for gantry entry including finishing with neat cement plaster etc complete as directed by Engineer-in-charge.

K ABBAS MANTHIRI