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Calcimator

Pylon Sign Foundation Calculator

Calculate footing dimensions, concrete volume, and rebar for a pylon or pole sign foundation based on wind load.

Inputs

Results

Footing Width

4.3 ft

≈ 9 smartphones

Footing Depth

8.3 ft

≈ 17 smartphones

Concrete Needed5.68 yd³
Rebar (est.)460 lbs
How to Use This Calculator
  1. Enter footing width (ft) and footing depth (ft) from the structural engineer's foundation design.
  2. Enter sign face area (sqft) for wind load context.
  3. Review concrete volume (yd3), rebar (lbs), and estimated foundation cost.
  4. Add anchor bolt cost and concrete forming materials to the foundation estimate.
  5. Pylon foundations must be engineered for wind load -- always use a licensed engineer for structures over 20 ft.

How the result changes with Design Wind Speed (mph)

Design Wind Speed (mph)Footing WidthFooting Depth
633.4 ft8.3 ft
964.5 ft8.3 ft
1355.7 ft8.3 ft
1676.5 ft8.3 ft

What each input means

Sign Face Area (sqft)
Total area of the sign face exposed to wind in square feet
Sign Height (ft)
Height from ground to the top of the sign
Design Wind Speed (mph)
Basic wind speed per local building code (ASCE 7) — typically 90-150 mph

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    Sign Face Area (sqft) = 64, Sign Height (ft) = 25, Design Wind Speed (mph) = 90 = 3 input(s) provided
  2. Calculate Footing Width
    Footing Width
    4.3 = 4.3
  3. Calculate Footing Depth
    Footing Depth
    8.3 = 8.3
  4. Calculate Concrete Needed
    Concrete Needed
    5.68 = 5.68

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