of backfilling + additional soil at site Add swelling factor based on the soil type: 5% sandy soil. Actual Engineering Length Width = smell width Emad Elbeltagi 26 13ġ4 Backfilling (Cubic meter) Backfilling = Excavation volume of all works inside the excavated pit (footings, smells, column necks, brickwork, etc.) + amount above GL (or amount below GL) Ground level (GL) Above Ground level Below Emad Elbeltagi 27 Leveling and Soil Transportation Leveling: Area (m 2 ) if thickness less than 30 cm Volume (m 3 ) if thickness more than 30 cm Transportation: Transported soil = vol. 2m GWT 0.5 m 0.5 m 0.5 m Wet soil (0.5 m) 2 m 2 m 1 m Dry soil (2 m) Emad Elbeltagi 25 Excavation Volume = Contractor Owner Depth of exc. Prices differ based on the soil type, deep of excavation, ground water level, site location, shoring system, Equipment used, etc. Review the contract conditions and specifications 11ġ2 2 Work items 1 Storage Each Ton Ton 2 م TILES m 3 95 % 75 % Emad Elbeltagi 23 Earth Works Backfilling Excavation Earth works Soil Transportation Leveling Emad Elbeltagi 24 12ġ3 Excavation (Cubic meter) Quantities are calculated based on the dimensions of the foundation in plans.
Check doors and windows model numbers Check ground water levels Preparation for quantity take-off Check architectural against structural drawings Check foundation design and foundation levels Check construction members dimension and reinforcement. 10ġ1 Preparation for quantity take-off Check the availability of drawings Check the axis and dimensions Check building levels and link it to structural drawings. Emad Elbeltagi 17 Measuring units Cubic meter (m 3 ) Used for items such as: Excavation Filling Concrete Masonry Square meter (m 2 ) Used for items such as: Masonry Plastering Flooring Painting 9ġ0 Measuring units Linear meter (m) Used for items such as: Oil pipe lines Sewage water pipe lines Canals Number (unit) Used for items such as: Electric outlets Doors and windows Sanitary fixtures Measuring units Lump sum(l.s.) Used for items such as: Manholes Lifts Item is subcontracted when the contractor does not have enough experience to construct it or there is an item which has a small quantities of many work items, such as manholes. Effort (Man-day): Renting of equipment or labor, etc.
Lump Sum: Some electrical and plumbing works, Manholes, etc. Weight (Ton): Metallic works, Reinforcement steel, etc. Volume (Cubic meter): Brick walls (>12 cm thick), Excavation, Backfilling, Reinforced Concrete, etc. Area (Square meter): Flooring, painting, plastering, Brick walls (12 cm or less), etc.
Length (meter): Windows sills, Pipes, Skirts, stair steps, etc. r ( 1 1 ) Volume = Area of Base Height 1 Volume = Area of Base Height 3 Emad Elbeltagi 16 8ĩ Units of Measurements Each (numbers): Piles, doors, Windows, Precast concrete, etc. 1 Quantity Take-off Required Information for Cost Estimate Detailed drawings Specifications Available site data Available resource data (labor, material & equipment) Government regulations Applicable owner requirements Emad Elbeltagi 2 1Ģ Contract Documents Contract agreement General conditions Special conditions Bills of quantities Drawings Specifications Plans Others (Change orders, Warranty.) Emad Elbeltagi 3 Quantity takeoff is necessary to perform a cost estimate The quantity of material in a project can be accurately determined from the drawing the estimator must make a complete and thorough job analysis The unit cost of different materials should be obtained from material suppliers Cost of delivery and wastage should be included The material quantity takeoff is extremely important for cost estimating Emad Elbeltagi 4 2ģ : Why? Owner perspective: Initial (preliminary) estimate of the project costs at the different stages of the project Preparing the BOQ as a requirement of the contract documents Estimating the work done for issuing the contractor payments Emad Elbeltagi 5 : Why? Contractor perspective: Pricing different work items Identifying the needed resources (Labor, Equipment, etc.) Project schedule Preparing invoices for work done Subcontractors payments Review and control of crews production rates Emad Elbeltagi 6 3Ĥ Quantity Surveying Table Emad Elbeltagi 7 Table Emad Elbeltagi 8 4ĥ Bill of Quantity: Sample Emad Elbeltagi 10 5Ħ Bill of Quantity: Sample Emad Elbeltagi 11 Priced Bill of Quantity: Sample Emad Elbeltagi 12 6ħ وزج ف ل ن اص و ا Statement for payment Emad Elbeltagi 14 7Ĩ Word order Items in takeoff sheets are organized in the same construction sequence Order of items in the same chapter: Items estimated in cubic meter (m 3 ) Items estimated in square meter (m 2 ) Items estimated in linear meter (m) Items estimated in numbers (unit) Items estimated in weight (ton) Items estimated in lump Sum (L.S.) Volume of some shapes A 1 =Top Area A=Bottom Area h ( 1 1 ) 1 Volume =.