tender for the miscellaneous civil works - terrace roofing works above processing hall and refrigeration block at thrissur dairy , thrissur dist- 1 concrete work:-providing and laying cement concrete 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 blocks, plain window sills, fillets, sunken floor, etc. up to floor five level, excluding the cost of centering, shuttering and finishing: 1:2:4 ( 1 cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size ) 2 roofing work: structural steel work riveted, bolted or welded in built up sections, trusses and framed work, including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer all complete. 3 steel work in built up tubular ( round, square or rectangular hollow tubes etc. ) trusses etc., including cutting, hoisting, fixing position and applying a priming coat of approved steel primer and two coat of epoxy paint, including welding and bolted with special shaped washers etc. complete. hot finished welded type tubes 4 providing and fixing .5 mm meta colour sheets ( glavalume sheet ) ( 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 ( 5.5x55mm ) 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. 5 providing and fixing precoated galvanised steel sheet roofing accessories 0.50 mm ( + 0.05% ) total coated thickness, zinc coating 120 grams per sqm as per is:mm ( +0.05% ) total coated thickness, 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 using self drilling / self tapping screws complete:ridges plain ( 500-600 mm ) 6 providing and fixing square type approved quality and brand pvc rain water gutter of 200 mm wide including all cost and conveyance charge, pvc down-outlet at every 3 / 4m etc complete. charges for structural steel for gutter shall be paid in the relevant item of structural steel. 7 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 8 miscellaneous work :- demolishing brick work manually / by mechanical means including stacking of serviceable material and disposal of unserviceable material within 50 metres lead as per direction of engineer-in-charge.in cement mortar 9 demolishing r.c.c. work manually / by mechanical means including stacking of steel bars and disposal of unserviceable material with in 50 metres lead as per direction of engineer -in-charge.