Calculateur de Plots de Terrasse Gratuit
Calculez le nombre et les dimensions des plots de fondation pour votre terrasse. Obtenez le volume de béton nécessaire.
Maximum spacing between footings along beam
Spacing between beam rows (perpendicular to joists)
Total Footings
9
Total Footings vs Deck Length
Formule
## How to Calculate Deck Footings ### Formula **Beam Rows = floor(Deck Width / Beam Spacing) + 1** **Footings per Row = floor(Deck Length / Footing Spacing) + 1** **Total Footings = Beam Rows × Footings per Row** **Concrete per Footing = pi × r² × depth / 27** Footing spacing is typically 6-8 ft for 2×8 beams or 8-10 ft for doubled 2×10 or 2×12 beams. Footing depth must extend below the frost line per local building code.
Exemple Résolu
A 16×12 ft deck with 8 ft footing spacing, 6 ft beam spacing, 12-inch diameter footings 42 inches deep.
- 01Beam rows = floor(12 / 6) + 1 = 3 rows
- 02Footings per row = floor(16 / 8) + 1 = 3 footings
- 03Total footings = 3 × 3 = 9 footings
- 04Footing radius = 12 / 2 / 12 = 0.5 ft
- 05Concrete per footing = 3.14159 × 0.5² × 3.5 / 27 = 0.102 cu yd
- 06Total concrete = 9 × 0.102 = 0.92 cu yd