Deck Footing Calculator
Calculate deck footing requirements, concrete volume, spacing, and depth with our comprehensive calculator. Plan your deck construction for optimal stability and safety.
Step 1: Deck Specifications
16 in
Standard Deck Specifications
Typical joist spacing: 16″ on center. Footing diameter: 8-12 inches for residential decks. Minimum footing depth: below frost line (typically 12-48 inches).
Step 2: Soil & Load Specifications
60 psf
Footing Requirements
Footings must extend below frost line to prevent heaving. Soil type affects bearing capacity. Standard residential deck load: 40-60 psf (pounds per square foot).
Deck Footing Results
Summary
Layout Visualization
Footing Comparison
Required Footings
9
20×12 ft deck
Concrete per Footing
1.2 ft³
Total Concrete
10.8 ft³
Footing Spacing
6.7 ft
Minimum Depth
42 in
Deck Layout Visualization
Footing Pattern
Grid
Beam Layout
Double 2×10
Soil Capacity
2000 psf
Safety Factor
1.5
Footing Type Comparison
| Footing Type | Diameter (in) | Min Depth (in) | Max Load (lbs) |
|---|
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