GENERAL - Under Pass Beautification and rectification of Varkala Underpass in Varkala - Kallambalam Road - work - Phase 1-General Civil Work

UNDERPASS MAINTANANCE

13.9.2:Cement plaster 1:3 ( 1 cement : 3 coarse sand) finished with a floating coat of neat cement.20 mm cement plaster

15.11.2:Removing mortar from and cleaning stones and concrete articles ( net quantity of stacks of cleaned materials will be measured):In cement mortar

24.2:Providing and fixing double scaffolding system (Cup lock type ) on the exterior side of building/structure, upto 25 metre height, above ground level, including additional rows of scaffolding in stepped manner as per requirement of site, made with 40 mm dia M.S. tube, placed 1.5 metre centre to centre, horizontal & vertical tubes joint with cup & lock system with M.S. Tubes, M.S. tube challis, M.S. clamps and staircase system in the scaffolding for working platform etc. and maintaining it in a serviceable condition for execution of work of cleaning and / or pointing and / or applying chemical and removing it thereafter. The scaffolding system shall be stiffened with bracings, runners, connecting with the building etc, wherever required, if feasible, for inspection of work at required locations with essential safety features for the workmen etc., complete as per directions and approval of Engineer-in-Charge. Note: - ( 1) The evaluational area of the scaffolding shall be measured for payment purpose, (2) The payment will be made once only for execution of all items of such works.

9.128:Providing and fixing factory made Fiberglass Reinforced Plastics (F.R.P) chajja 4 mm thick of required colour, size and design made by Resin Transfer Moulding (RTM) Machine Technology, resulting in void free compact laminate in single piece, having smooth gradual slope curvature for easy drainage of water and duly reinforced by 2 nos vertically 1 nos horizontally 50x2 mm thick M.S. flat with 12mm in built hole for grouting on the existing wall along with the 50 mm flanges duly inserted and sealed in the wall complete in one single piece casted monolithically, including all necessary fittings. The FRP Chajja should be manufactured using unsaturated Polyester resin as per IS: 6746, duly reinforced with fibre glass chopped strand mat (CSM) as per IS: 11551 complete with protective Gel coat U/V coating on Top for complete resistance from the extreme of temperature, weather & sunlight.

12.42.2.2:Providing and fixing on wall face unplasticised- PVC moulded fittings/ accessories for unplasticised Rigid PVC rain water pipes conforming to IS : 13592 Type A, including jointing with seal ring conforming to IS : 5382, leaving 10 mm gap for thermal expansion Single pushfit Coupler110 mm

12.42.3.2:Providing and fixing on wall face unplasticised- PVC moulded fittings/ accessories for unplasticised Rigid PVC rain water pipes conforming to IS : 13592 Type A, including jointing with seal ring conforming to IS : 5382, leaving 10 mm gap for thermal expansion Single tee with door110x110x110 mm

12.42.5.2:Providing and fixing on wall face unplasticised- PVC moulded fittings/ accessories for unplasticised Rigid PVC rain water pipes conforming to IS : 13592 Type A, including jointing with seal ring conforming to IS : 5382, leaving 10 mm gap for thermal expansion Bend 87.50110 mm bend

12.42.6.2:Providing and fixing on wall face unplasticised- PVC moulded fittings/ accessories for unplasticised Rigid PVC rain water pipes conforming to IS : 13592 Type A, including jointing with seal ring conforming to IS : 5382, leaving 10 mm gap for thermal expansion Shoe (Plain)110 mm Shoe

12.44:Providing and fixing to the inlet mouth of rain water pipe cast iron grating 15 cm diameter and weighing not less than 440 grams.

12.41.2:Providing and fixing on wall face unplasticised Rigid PVC rain water pipes conforming to IS : 13592 Type A, including jointing with seal ring conforming to IS : 5382, leaving 10 mm gap for thermal expansion, (i) Single socketed pipes.110 mm diameter

13.45.1:Finishing walls with textured exterior pint of required shade:New work (Two or more coats applied @ 3.28 ltr/ 10 sqm ) over and including priming coat of exterior primer applied @ 2.20 kg/ 10 sqm

26.28.1:Chipping of unsound/weak concrete material from slabs, beams, columns etc. with manual Chisel and/ or by standard power driven percussion type or of approved make including tapering of all edges, making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. and disposal of debris for all lead and lifts all complete as per direction of Engineer-In-Charge75mm average thickness

26.37:Cleaning of exposed concrete surface of sticking material including loose and foreign material by sand blasting with coarse sand followed by and including cleaning with oil free air blast as per direction of Engineer in charge.

13.43.1:Applying one coat of water thinnable cement primer of approved brand and manufacture on wall surface:Water thinnable cement primer

OD254852/2025-2026:Injecting neat cement slurry of pumpable grade mixed with 5 % of' plasticised expanding admixture STABILCEM brand from MAPI:I (1,> per the manufacturers specification through already pre fixed aluminium nozzles with a pressure of 2-3 Kg/ Sqcm till the nozzles refuses to removing the nozzles the next day and making good the surface using fast plugging compound as per the Engineer-in-charge.

OD254853/2025-2026:Providing micro concrete using " shrinkomp" high grade content and 6 mm chips in 4:1 proportion ( 4 shirinkomp and one metal) mixing the above material as liquid type concrete and filling the same inside the form work covering in 20 cm layers including extra protective work to the form work for avoid pushing the same during filling concrete including cost, conveyance and all labour charges etc complete Code

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