tender for general-blind school, kunnamkulam-maintenance works 2024-2025 -general civil work--- 1 maintenance works 2024-25 repairs to blind school 2 4.2.3: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 (zone-iii) derived from natural sources : 4 graded stone aggregate 20 mm nominal size derived from natural sources) 3 50.10.2:steel work for purlin/single section with g i pipes 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 4 50.10.1:steel work in built up g i tubular ( round, square or rectangular hollow tubes etc.) trusses etc., 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 5 od64192/2024-2025:supplying and fixing the powder coated 0.4mm thick pre fabricated g.i ridge sheets over g.i.trafford sheeting with nical coated g.i bolts or self screws,working in line and level cost including materials labour fittings conveyance etc complete fitted as per the direction of the engineer at site. 6 12.50: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 (5.5x55mm) 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. 7 50.18.9.19.1:providing and fixing pvc pipes including fixing the pipe with clamps/ clips/ at 1.00 m spacing . this includes jointing of pipes with one step pvc solvent cement and testing of joints complete as per direction of engineer-in-charge 110 mm dia 6 kgf/cm2 - external work- exposed on wall 8 50.18.9.22.4:providing and fixing pvc moulded fittings/ accessories for rigid pvc pipes, including jointing with pvc solvent cement- 110 mm dia bend 9 od147355/2025-2026:providing and fixing 15cm wide, 45 cm overall perimeter upvc gutter with iron brackets 40x3 mm size, bolts, nuts and washers etc., including making necessary connections with rain water pipes complete.