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Tenders are invited for Construction of Concrete Elevated Tanks and Solarization Systems for Existing Shallow Wells in Farah Gedi and Hiran Shallow Wells in Howlwadag, Beledweyne District, Hiran Region. 1 Clearing the site by cutting, removing and disposal of all trees, shrubs and any other objectionable material. This includes, clearing the site from any left-over construction materials after the completion of the work. m2 63 Invitation to tender 11 2 Earth work in excavation for isolated pad footings in all kinds of soils including the dressing of the bottom and sides of the excavation and subsequent backfilling around the footings in layers of 200mm watered and well rammed. Excavation dimensions: 2.2m*2.2*2.1m for footings, and 0.6*0.6*(8m) long linear strips. m 3 64.584 3 Supply and cast 10cm thick PCC blinding slab 1:3:6 under all footings. m 3 3.504 4 Supply and cast 6 RCC isolated footings with ratio of 1:1.5:3 proportions reinforced with 14mm bars @ 15cm c/c spacing. Footing dimensions: 2*2*0.6m. Rate shall include, shuttering, vibrating, curing and workmanship. m 3 14.4 5 Supply and cast 6 RCC column starters with with ratio of 1:1.5:3 proportions, reinforced with 4Y14mm and 4Y16 as main reinforcement and R8mm as stirrups @ 15cm c/c spacing. The columns should be cured well, using wet gunny bags. Rate shall include, shuttering, vibrating, curing and workmanship. m 3 12.48 6 Construction of random rubble stone masonry foundation wall of 40cm thick bedded and jointed with cement sand mortar of 1:4 proportions. The wall should be kept moist at least 4 days. the minimum height of the wall should be 30cm above the ground level and 50cm below the ground level. m 3 8.48 7 Backfill the plinth area with selected material. The backfill material shall be spread uniformly in layers, levelled, watered and then compacted to 95% of its optimum density in layers not exceeding 200 mm. m 3 10.08 Invitation to tender 12 8 Supply and cast RCC plinth beam with ratio of 1:1.5:3 proportions (M20), reinforced with 6Y16mm with R8mm stirrups @20cm c/c spacing. Beam section dimension to be 0.4m*0.2m. Rate shall include, shuttering, vibrating, curing and workmanship. m 3 1.888 9 Supply and cast plain concrete floor slab of 10cm thick and 1:2:4 proportions well cured for least 10 days. Rate shall include shuttering, vibrating, curing and workmanship. m 3 1.872 10 Supply and cast RCC beams, middle tie beams reinforced with 6Y16 main rebars and slab beam reinforced with 5Y16 and 4Y14, all with R8mm stirrups @15cm c/c. Concrete shall be of 1:1.5:3 mix proportions (M20). Beam section dimensions shall be as per drawings and rate shall include, shuttering, vibrating, curing and workmanship. m 3 12.448 11 Supply and cast 20cm thick RCC slab for the tank base floor proportions of 1:1.5:3 mix ratio. Reinforced with double mesh of Y12mm @150mm c/c. Rate shall include, shuttering, vibrating, curing and workmanship. m 3 9.048 12 Supply and cast 20cm thick RCC walls with ratio of 1:1.5:3 cement, sand and aggregate. Reinforced with double mesh of Y12mm @15cm c/c spacing. Rate shall include, shuttering, vibrating, curing and workmanship. m 3 9.152 13 Supply and cast 12cm thick RCC slab for the tank roof floor proportions of 1:2.4 mix ratio. Reinforced with single layer mesh of Y12mm @150mm c/c. Rate shall include, shuttering, vibrating, curing and workmanship. m 3 3.198 14 Provide and fix 3 inch diameter Inlet and outlet GI pipe class C with valves 2inch , Over flow pipe 2 inch as well as pressure pipe complete with all the fitting necessary for the full fictional plumbing work. No. 5 15 Supply and install steel access ladder to the tank with safety cage made of steel flat bars and including all supports to the concrete base and skeleton of the tank, painting with two coats of oil paint on one prime coat. The ladder should be firmly fixed to the tank, as instructed by the Engineer. Ls 1 16 Supply and install galvanized steel manhole lid (0.6x0.6m) for the tank upper access and painting with one prime coat, and two oil coats. Ls 1 17 Supply and apply two coats 30mm plastering (1:2) on the internal and external surfaces of the tank, columns ,Slab bottom surface, cover slab upper surface and beams. m 2 310.706 18 Supply and apply two coats of water proofing cementious coating in to the inside walls of the tank as aproved by the SCI engineer. m 2 68 19 Two coats of White washing and distempering on the external faces of tank, beams and columns. m 2 284.056 20 Supply and paint visibility signboard on tank walls showing the SCI and donor logos as per the provided information and to approved size. Ls 1 21 Supply and cast 10cm diameter circular RCC railings using 4 -inch PVC pipe and 12mm diameter rebar as per the attached designs and engineers instruction. SCI engineer can decide to replace the concrete guard rails with the steel type but such shall be agreed with the contractor without extra cost to the project. Ls 1 Invitation to tender 14 22 Construction of gate valve chamber including lockable steel cover with strong hinges and any necessary painting. Internal dimensions: 40x40x40cm approximately or as approved by SCI engineer. No. 1 Tender Link : https://somalijobs.com/tenders
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