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CPCCBC4004 Estimated Costs for Building Projects

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Estimating Costs for Building and Construction Projects (CPCCBC4004A)

   

Added on  2020-05-28

CPCCBC4004 Estimated Costs for Building Projects

   

Estimating Costs for Building and Construction Projects (CPCCBC4004A)

   Added on 2020-05-28

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ESTIMATED COSTS FOR BUILDING PROJECTS 1NameCourseProfessorDate
CPCCBC4004 Estimated Costs for Building Projects_1
ESTIMATED COSTS FOR BUILDING PROJECTS 2Estimated Costs for Building and Construction ProjectsQuestion 1: Bored excavation for 300mm diameter piersTotal volume is calculated by considering bulking factor of soil[ CITATION Pet14 \l 1033 ].ItemParticularsUnitQuantityRate$ C1Bored excavation volume for 53 Ø300mmand 2.5m deep piers Cross sectional area of pier = πr2 = π x 0.152 =0.07m2Volume of pier = cross sectional area x depth= 0.07 x 2.5 = 0.18m3Volume of 53 piers = 0.18m3 x 53 = 9.54m3Assume bulking factor of 1.4 (clay soil), totalvolume of soil material to be excavated forboring of piers = 1.4 x 9.54 = 13.6m3m314Summary:A total of 53 53 Ø300mm and 2.5m deep pier bores shall be excavated. For all the 53 piers, a total volume of about 14m3 of soil material will be excavated for the piers to be bored.
CPCCBC4004 Estimated Costs for Building Projects_2
ESTIMATED COSTS FOR BUILDING PROJECTS 3Question 2: Bulk excavation for general site preparation[ CITATION Del12 \l 1033 ]ItemParticularsUnitQuantityRate$ C2Bulk excavationm3150Overall bulk area of excavation (plus workingspace) = (12.83 + 4.08 + 2.00) x (11.87 +2.00)= 18.91 x 13.87 = 262.28Estimated depths at corners: NE – 0.69m,NW - 0.55m, SE – 0.50 and SW – 0.45)Average depth = (0.690 + 0.54 + 0.45 +0.40)/4 = 0.55mVolume of bulk excavation = area x depth= 262.28m2 x 0.55m = 144.25Assume that only one side is battered =18.91m x 1.0m wide x 0.55m = 10.40m3Since battering is done at 45 degrees, batteredvolume is = 0.5 x 10.40 = 5.20 Total volume of bulk excavation = 144.25 +5.20 = 149.45 Summary:A total of 150m3 of shall be excavated from the site during general preparation of the site. This bulk volume includes working space, which extends outside the building towards the boundary by 1m. The longest side of the building shall also be battered at an angle of 45 degrees and a width of 1m from the building. The total bulk volume of 150m3 to be excavated includes the actual site of the house, working space and battered volume. The subcontractor has to use this value to determine the most suitable equipment to use for bulk excavation and if the excavated material will have to be cart away.
CPCCBC4004 Estimated Costs for Building Projects_3
ESTIMATED COSTS FOR BUILDING PROJECTS 4Question 3: N25 concrete for the ground slab (beams, patio slab and pad footings)Thickness of slab = 150mm = 0.15mThickness of beam = 450mm = 0.35mWidth of beam = 100mm = 0.1mItemParticularsUnitQuantityRate$ C3N25 Concrete for ground slabm3Slab on ground = length x width x slabthickness= 12.83m x 11.87m x 0.15m = 22.84m323Patio slab = length x width x thickness= 6.35m x 1.67m x 0.15m = 1.59 m32Family room = length x width x thickness = 5.51m x 4.08m x 0.15m = 3.37 m34Beams on slab = total length of beams xwidth of beam x depth of beam= 82.82m x 0.1m x 0.45m = 3.73 m34Pad FootingsArea = 10(1.2 x 0.9) + (0.35 x 2.4) = 10.80 + 0.84 = 11.64m2Volume = area x depth = 11.64 x 0.35 = 4.074 m35Total m338Summary:A total volume of 38m3 of N25 concrete shall be required for the whole ground slab, including beams, patio slab and pad footings but excluding piers. Depending on the mix design recommended by the engineer, it noes becomes easier to determine the volume of concrete ingredients (concrete, coarse and fine aggregates and sand) needed for the ground slab. Question 4: SL72 reinforcing mesh for the ground slabs
CPCCBC4004 Estimated Costs for Building Projects_4

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