09/EE-BSNL/CD/EKM/2022-23

Amount

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 plinthlevel 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) derived from natural sources : 3 graded stone aggregate 20 mm nominal size derived from natural sources).

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

a) Lintels, beams, plinth beams, girders, bressumers and cantilevers

Steel reinforcement for R.C.C. work including straightening, cutting,bending, placing in position and binding all complete above plinth level.

a) 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).

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

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 galvanised 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 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 /self 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.

Dismantling 15m MARR tower from the terrace of TE building Perinthalmanna , bring down the material to ground level with rope and pulley arrangement witout causing damages to the tower matetials and building and stacking the material etc complete as per the direction of Engineer-in Charge.

Transportation of 15m MARR tower meterials from TE Perinthalmanna ( Malappuram BA ) to the proposed MARR site at KOTHAPARAMBU ( Near Kodungallur ) including labour charges loading and unloading etc. complete. ( The Distance for Transportation is not less than 114 Kms)

Lifting/hoisting the materials of MARR tower in segment of 3m length from the ground to the roof of the proposed building with rope & pulley arrangement without causing damage to the mast materials as well as the building and Erection of mast in segments of 3m each and having approximate weight of 75kg including providing & fixing MS hot dipped galvanized nuts, bolts and washers tightening properly, etc. complete as directed by the Engineer-in-Charge.

Upto 15.00 m height

Providing and placing of anchor bolts in sets including templates all labours and handling charges and checking with template in line level plumb etc as required by the Telecom authorities etc complete.

Drilling hole in hard granite/RCC using pneumatic percussion rotary drill and forming rough side bore holes of uniform size and alignment including making the hole free from debris, dust by flushing, etc. and disposal of the rubbish as directed by the Engineer-in-Charge

25mm dia

Supply and filling polyster resin grout of approved quality (Lokset-S of Fosroc or equivalent) in bore holes of 25mm dia and alround anchorage reinforcement bars, after completely cleaning the holes free from dust including degreasing the anchoring bars and removing any flaky rust, if present, etc. complete. Resin and catalysed filler to be mixed in one operation. The rate is inclusive of all labour charges and material cost:-

25mm dia bore holes

Providing and fixing multistranded high tensile stainless steel stay wire rope of 8mm dia for anchoring and tightening the mast, one end of the stay wire should be connected to the mast at top at specified height and the other end should be anchored to RCC block cast on the roof including necessary stainless steel clamps, clips, nuts and bolts, etc. complete.

Providing and applying paint of approved specification over the MARR mast indicated in item above .(Two coat of epoxy primer (MRF,Asian paint or equalent)should be applied first followed by two coats of epoxy paint Orange/White of approved brand and manufacture should be applied).

MARR mast upto 15 m height

Scrapping the Old and deteriorated paint scalings on the MARR Mast completely using sand paper to prepare the surface to receive new coat of priming coat and paint .

Supply of Good quality MS hot dipped galvanised bolts,nuts,plain and spring washers etc .of different diameter size as specified for tower works.( The item shall be executed for providing in place of the Missing Nuts and bolts if any during dismantling and transportation of tower earlier.The payment shall be made only to the fresh quantity of Materials supplied to the site according to the requirement )

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 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 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 operation ,Materials ,Transportation and Fixing Charges and Nothing Extra shall be Paid on Any Account )

Providing G I plate earth including excavation of pit of size 2000x2000x3000mm depth in all kinds of soils and placing four numbers of G I plates of size 600x600x6 mm thick vertically at diagonally opposite ends in the excavated pit and inter connecting the plates with 4 Nos. of 50x3mm G I strips with 2 Nos of G I bolts and nuts of 10mm dia at each connection and covering the joints with bitumen, placing G I pipe of 50mm internal dia ( B Class) and 3000mm length at the center of the plate grid for watering and filling the pit with fine ash and / or finally seived good quality soil including ramming in 20 cm layers etc complete and cover the pit with 750x750x50mm thick precast reinforced cement concrete slab having 100mm dia hole at the centre to pass the GI pipe and construct a chamber of Internal size not less than 280x280x250mm with half brick wall including fixing CI manhole cover of size 300x300mm of weight not less than 7.20 Kg. (cover & frame) and plastering the chamber on all sides with cement mortar 1:4 of 12mm thick (1 cement : 4 fine sand) and including disposal of surplus excavated earth if any within a distance of 5 Km lead as directed by the Engineer-in-Charge.

Providing ring earth by excavating of trench of width 500 mm and depth 1200 mm depth and laying G I flats of size 50x3mm and jointing this flats with plate earth [vide item No.14] and jointing at corners with 2 Nos. of 10mm dia G I bolts and nuts with necessary spring washers including lead strip of 90 x 50 x 1 mm in between the joining members, and refilling the trenches with the excavated soil free from stones and disposal of surplus soil within 5 Km lead as per the direction of the Engineer-in-Charge. (All joints should be covered by Shalimar or equivalent water proof tape and made air tight)

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 sprike for a length not less than 150 mm (lightning conductor to be fixed at the top of the tower) and connecting the GI busbar to the lightning arrester using 2 Nos. 10 mm dia brass bolts and nuts 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 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 Nos 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)

M J JOSEPH