Raising of OFC Cable manhole chambers at various routes in Dehradun City.

Amount

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

1:1½:3 (1 Cement: 1½ coarse sand(zone-III) derived from natural sources : 3 graded stone aggregate 20 mm nominal size derived from natural sources).

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.

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.

6 mm cement plaster of mix :

1:3 (1 cement: 3 fine sand)

Replacing of damaged or missing OFC manhole chamber cover of size 0.4mx1.2m from existing OFC Manhole chambers with manhole opening size of 1.6mx1.2m including removing of existing precast manhole cover, fixing of frame made from MS angle/plate 150X150X10 mm and bottom of MS sheet 1.5 mm thick welded to the frame, concreting with RCC 1:1.5:3 (1 Cement : 1.5 Coarse Sand : 3 Graded Stone Agrregate 20mm nominal size) with reinforcement TMT bars of dia 12mm , as per approved design & neat punning the top sruface and placing it back after raising the OFC Manhole chamber all complete as per the direction of Engineer-in-Charge. The rate includes all material & labour involved for the required work including curing & disposal of malba beyond municipal limits.

Raising top of OFC manhole chamber(of size o/o 1.9mx1.5m) including covers ( on opening of size1.6mx1.2m) by 300 mm from existing level including removing of existing precast manhole cover, including dismantling and refixing base frame (after repairing , if required or otherwise) made of MS angle 150X100X6 mm providing steel reinforcement (TMT bars of size 12mm dia logitudinal bars & 10mm dia horizontal bars) as per approved design including welding reinforcement bars wherever required and necessary centering shuttering, concreting with RCC 1:1.5:3 (1 Cement : 1.5 Coarse Sand : 3 Graded Stone Aggregate 20mm nominal size) with reinforcement, all complete as per the direction of Engineer-in-Charge. The rate includes necessary liasoning with local authorities and traffic police, hiring of welding machine & water tanker and all other material & labour, and cost of locating the OFC Manhole chambers, cutting bituminous/cement concrete or any other type of pavement, making necessary arrangement for diversion of traffic by erecting barricading and safety bollards, provision of warning lamps at night, necessary manpower for day/night traffic diversion and watch & ward, making slope for edge protection with bituminous/Cement Concrete to raised portion,neat cement punning of top surface including slopes/ramp portion, replacing of the covers in new location, clearing all malwa from site to nearest municipal dump, curing for the required period etc.

Add or deduct for every additional raising or less raising of height by 50 mm or part thereof beyond/below 300 mm from existing top level of OFC Chamber as adopted in the main item of raising top of OFC manhole chamber ( of size O/o 1.9m x 1.5 m). (Note: Raising or less raising of height of OFC Manhole chamber by 50 mm or part thereof constitute 01 Job).

VINOD KUMAR DHIMAN