Making false ceiling with existing old ceiling board and inter locking metal grid under MS frame structure in room no. SI-003 (Chemical Lab) of Environmental Engineering Group at CSIR-CMERI Institute campus, Durgapur-09

Amount

Demolishing brickwork manually/ by mechanical means including stacking of serviceable materials and disposal of unserviceable materials within 50m lead in cement mortar.

Providing and laying cement concrete 1:2:4 (1 Cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size) in retaining walls, return walls, walls (any thickness) including attached pilasters, columns, piers, abutments, pillars, posts, struts, buttresses, string or lacing courses, parapets, coping, bed blocks, anchor block, plain window sills, fillets etc. up to floor five level, excluding the cost of centreing, shuttering and finishing:

Providing and Fixing false ceiling tiles (Supplied by the department) of size 595 x 595 mm in true horizontal level, suspended on inter locking metal grid of hot dipped galvanised steel sections (Supplied by the department) (galvanising @ 120 grams per sqm including both side) consisting of main ‘T’ runner suitably spaced at joints to get required length and of size 24x38 mm made from 0.33 mm thick (minimum) sheet, spaced 1200 mm centre to centre, and cross “T” of size 24x28 mm made out of 0.33 mm (Minimum) sheet, 1200 mm long spaced between main’T’ at 600 mm centre to centre to form a grid of 1200x600 mm and secondary cross ‘T’ of length 600 mm and size 24 x28 mm made of 0.33 mm thick (Minimum) sheet to be inter locked at middle of the 1200x 600 mm panel to from grid of size 600x600 mm, resting on periphery walls /partitions on a Perimeter wall angle pre-coated steel of size(24x24X3000 mm made of 0.40 mm thick (minimum) sheet with the help of rawl plugs at 450 mm centre to centre with 25 mm long dry wall screws @ 230 mm interval and laying 15 mm thick densified edges ceiling tiles of approved texture in the grid, including, cutting/ making opening for services like diffusers, grills, light fittings, fixtures, smoke detectors etc., wherever required. Main ‘T’ runners to be suspended from ceiling using G.I. slotted cleats of size 25x35x1.6 mm fixed to ceiling with 12.5 mm dia and 50 mm long dash fasteners, 4 mm G.I. adjustable rods with galvanised steel level clips of size 85 x 30 x 0.8 mm, spaced at 1200 mm centre to centre along main ‘T’, bottom exposed with 24 mm of all Tsections shall be pre-painted with polyster baked paint, for all heights, as per specifications, drawings and as directed by Engineer-in-Charge.

Steel work with hot finished welded type tubes ( round, square or rectangular hollow tubes etc.) in built up trusses including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer, including welding and bolted with special shaped washers etc. complete.

Painting with synthetic enamel paint of approved brand and manufacture to give an even shade two or more coat.

12 mm cement plaster of mix of mix 1:4( 1 cement : 4 fine sand).

Providing 15 mm thick, light weight, integral densified micro look edged,false ceiling tiles of size 595x595 mm.

SEKHAR DAS