Construction Cost Estimating
Class #5 - Concrete
Prof. Ralph V. Locurcio, PE
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Forms
Reinforcing
Concrete
Spread Footings
Columns
Foundation Walls
Beams
Slab
Conclusion
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May be bid by itemization
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Based on square footage rather than linear
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SFCA = square foot contact area
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Quantity of form material & labor
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Rebar
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Purchase
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Welded wire fabric
Small amounts by lineal foot (20’)
Large amounts by pound/ton
Fabricated
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Fabricated in the field, lengths of 20-60 ft
Large jobs fabricated and shipped
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Rebar sizes
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Various types based specs & strength
Type I = normal cement
 Type II = moderate-sulfate resistance cement
 Type III = high-early-strength cement
 Type IV = low-heat-of-hydration
 Type V = high-sulfate –resistance cement
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Mixes
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Add-mixtures are included for certain physical
properties
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Costs
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Best place to get prices is from concrete suppliers
Bid by cubic yard
Labor for placement and finishing (use RS Means)
Placement
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From truck with chute
Concrete bucket
Concrete pump
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Spread Footings
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Package includes:
footings, forms,
horizontal rebar in
the footings and the
dowles
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Continuous footings
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Similar to spread
footing but a much
longer than they are
wide
Figure 5-1
Volume Calculation
Linear Calculation
Concrete column as volumetric good
Figure 5-1
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Lots of examples
Any questions?