Construction Estimating

How to Calculate Concrete

How to Calculate Concrete Remember: 1 Cubic Yard of Concrete = 3′ x 3′ x 3′ = 27 cubic feet = 46,656 cubic inches Calculate Concrete Yardage This is an exercise aimed at a real world example of how to calculate concrete yardage needed to order for your slab placement. The given’s for this exercise [...]

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Pythagorean Theorem

Construction Estimating

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Calculating Roof Decking

Construction Estimating

Decking (sheets) Rise Formula – Pitch X Run = Rise [ (Slab area + 300 SF (for overhangs) x Pitch factor + 20% Waste ] Divided by 32.

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Roof Pitch Factors

Construction Estimating

Roof Pitch Factors Used in Formulas Below 2/12 Pitch = 1.014 • 3/12 Pitch = 1.031 • 4/12 Pitch = 1.054 • 5/12 Pitch = 1.086 • 6/12 Pitch = 1.118 • 7/12 Pitch = 1.158 8/12 Pitch = 1.202 • 9/12 Pitch = 1.251 • 10/12 Pitch = 1.302 • 11/12 Pitch = 1.357 [...]

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Estimating Framing Materials

Construction Estimating

Framing Material Estimates 2″x4″ treated plate-slab permiter x 2 (convert to 2″x6″ manually for 2″x6″ walls) Studs – One per lineal foot 1″ x 4″ wind bracing – six (6) 12′s and six (6) 14′s per house 2″x4″ RL: 1 Story – Lineal footage of walls x 10 2 Story – Lineal footage of walls x 8. [...]

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Concrete Slab Estimating

Construction Estimating

Concrete POLY FORMULA – Total slab area + total beam lengths x 3 = total poly square footage. Concrete for 10″ x 24″ beams is calculated to cover 32 sq. ft. of slab area at 4″ deep. Flatwork, driveways, and sidewalks are estimated to cover 75 sq. ft. per cubic yard. One roll of wire [...]

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Field Engineering Conversion

Construction Estimating

Converting Inches to Decimals (Field Engineering Calcs) 1″ = 0.08 2″ = 0.17 3″ = 0.25 4″ = 0.33 5″ = 0.42 6″ = 0.5 7″ = 0.58 8″ = 0.67 9″ = 0.75 10″ = 0.83 11″ = 0.92 12″ = 1.0

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Area Measurements Common in Construction

Construction Estimating

Area Measurements Common in Residential Construction

Area Measurements Area of Floor or Ceiling = Length x Width Area of Walls = (Length x Height) of each wall added together Area in Square Yards = Area in SF divided by 9

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