NIT 08/BSNL/CD/MYS/2025-26

Amount

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 for all lift, as directed by Engineer-in-charge.

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 getting out and disposal of excavated earth, lead up to 50 m and lift up to 1.5m, as directed by Engineer-in-Charge.

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

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

All kinds of soil.

Ordinary or hard rock.

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

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)

Centering 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

Steel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete upto 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).

Providing and fixing ISI marked, IS : 1341, M.S. heavy weight bright finished butt hinges with necessary screws 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.

In gratings, frames, guard bar, ladder, railings, brackets, gates and similar works.

Providing and fixing precoated galvanised iron profile sheets (size, shape and pitch of corrugation as approved by Engineer-in-Charge) of total coated thickness 0.50 mm (base metal of minimum 0.45 mm thickness with total coating thickness of 0.05mm) with zinc coating 120 grams 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 12 metre or as desired by Engineer-in-charge. The sheet shall be fixed using self drilling /seIf tapping screws of size (5.5x 55 mm) 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 galvanised steel sheet roofing accessories of total coated thickness 0.50 mm (base metal of minimum 0.45 mm thickness with total coating thickness of 0.05 mm) with Zinc coating 120 gram 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 :

Gutter (600 mm over all girth)

15 mm cement plaster on rough side of single or half brick wall of mix :

1:6 (1 cement: 6 coarse sand)

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 @ 0.90 litre/10 sqm)

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

Two or more coats on new work over an under coat of suitable shade with ordinary paint of approved brand and manufacture.

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.

Made of G.I. wire of dia. 4 mm, PVC coated to achieve outer dia not less than 5 mm in required colour and shade

Mechanical Transportation including insurance of four legged angular light weight galvanised steel roof top communication tower material including ladder, working platform, cable trays and antenna fixtures etc., from the departmental stores / site of work including the cost of necessary loading / unloading and other incidentals all complete as directed by the Engineer-in-charge.(From Tumkur to Kalmadka in D K Dist) a) 40 m high tower materials

Up to 05( Five) kms.

Beyond 05(five) Kms up to 10(ten) kms.

Beyond 10(ten) Kms up to 20(tenty) kms.

Beyond 20 kms. (From Tumkur to Kalmadka, D K Dist = 475 km)

Labour charges for fixing anchor bolts of any dia in position during concreting including fixing necessary templates,making dimensional adjustments for centre line distances of tower legs and carriage of anchor bolts,templates from Telecom stores, Tumkur to site of work etc.as per the direction of Engineer in charge.

Erection of four legged light weight communication tower of 40 mts. height, including insurance, sorting and listing of tower materials as per chart/drawing supplied by the manufacturer/ BSNL and placing of anchor bolts and templates and fixing in the columns, beams, etc all complete. (Note 1: Necessary safety measures shall be adopted while erecting the tower to ensure the safety of men and materials and adjacent properties). (Note 2: The safe custody of tower materials will be the responsibility of the agency from the time of handing over by department till the handing over of tower to concerned authorities.) (Weight of tower materials may vary from 8.6 MT to 10 MT.)

Providing and applying high gloss synthetic enamel paint ( two or more coats) of approved brand and colour ( International white and orange) over approved base coats of 'ETCH ' primer and zinc chromate primer for four legged galvanized ground based communication tower as per specifications enclosed as per the directions of the Engineer-in-charge, for 40 m GBT (Weight of tower materials may vary from 8.6 MT to 10 MT.)

Providing GI plate earthing including excavation of pit of size 2.00m x 2.00m x 3.00m depth in all kinds of soil including rocky strata and placing four numbers of GI plates of size 600 x 600 x 6.5 mm thick vertically in all the four corners of the excavated pit and inter connecting the plates with GI strips of size 50 x 3 mm with two nos of GI bolts and nuts of 10mm dia at each connection. To prevent ingress of moisture and soil, the joints are made water tight by covering with bitumen. A GI pipe of 50mm dia 3000mm long with holes at zigzag position at 100 mm interval with GI funnel at top shall be provided for watering the earth. 2nos of 50 x 3 mm GI strips shall be connected with any one of a GI plate electrode with GI bolts and nuts and a lead strip of 1mm thickness inbetween the joints. The GI strip will run vertically and be bent with a radius of 1m at a depth of about 30cm. below ground level to interconnect with other pit earth.

After the electrodes are placed in position and all the interconnections made, the pit should be filled up with finely sieved good quality soil which should be rammed in layers so that it is compact and cohesive. The surplus excavated earth shall be disposed off as directed within a lead of 50metre. A precast RCC slab of size 530 x 530 x 75mm with 75mm ida hole at the centre to pass GI pipe in it shall be placed and a half brick masonry chamber of size 280 x 280 x 280mm shall be constructed over it. The chamber will be covered with GI manhole cover and frame of 300 x 300mm (the weight of cover being not less than 4.5kg and the frame not less than 2.7kg.) etc. complete as directed by the Engineer - in - charge. (The rate is inclusive of supplying required quantity of finely sieved good quality soil at site).

Providing and laying ring earth including excavation of trench of size 300 width x1000 to 1500 mm depth ( in rock minimum depth shall be 600mm) and laying 50 x 3 mm GI flat (with zinc 610gm/sqm) at the bottom as per drawing and then refilling with finely sieved good quality soil. The ring earth shall be connected to all the tower legs with GI strips 50 X 3 mm and with GI bolts and nuts at ends. Provision for connecting ring earth to the lightening arrestor shall be made by providing 50 X 3 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 earth with necessary bolt holes.

Providing and fixing G.I. strips of 50 x 3mm size of approved quality one end connected to the bottom of lightening arrester and the other end connected to the ring earth/plate earth with 2nos. 10mm dia. G.I. bolts and nuts at every connection. The G.I. strip shall be clamped to the tower at uniform intervals at 1.50 m using necessary Porcelean insulator clamps with bolts and nuts to aviod direct contact with the tower, as directed by the Engineer-in-charge.

Providing and fixing copper lightening arrester of 1500 mm length, 25mm dia. Hollow tube and of wall thickness not less than 1.60mm including tinning the bottom portion of the spike for a length of not less than 150mm and connecting to the G.I. strip of size 50 X 3 mm by means of clamps and 2 nos. 10 mm dia brass bolts and nuts all complete as directed by the Engineer-in- charge. The lightening spike shall be fixed to the tower with Teflon sheet to avoid direct contact with the tower.

Supplying and fixing LED double aviation obstruction lamp of Saraj, Binoy, Aviads, Litten or equivalent with light dependent resistance sensor (day and night automatic timer) with necessary MCB switches, 1.5 sqmm. armoured cables of required length, clamps etc. complete.

Making arrangement for A/T by providing all tools,necessary labours including providing theodolite,torque wrench,Meggar,transportation of all tools & plants & A/T team to the tower site and back,providing insurance coverage to labours to complete the A/T etc. all as per the requirement of A/T & as directed by the Engineer in charge.

Stone work with neatly dressed laterite stones of size 35cmx21cmx20cm in foundation and plinth in cement mortar 1:6 ( 1 Cement : 6 coarse sand)