Calculadora de Cercas de Madeira
Calcule mourões de madeira, barrotes, tábuas e sacos de concreto para construir cercas seguras.
Medidas do Projeto
Digite as dimensões para calcular os materiais necessários
Insira as medidas acima para visualizar os resultados.
Exemplo Passo a Passo
Cenário: Building a 100 ft long, 6 ft high wood privacy fence with 8 ft post spacing and 1 gate.
Calculate Sections: 100 ft ÷ 8 ft = 12.5 -> 13 bays.
Calculate Posts: 13 + 1 + 1 (gate post) = 15 posts.
Calculate Rails (3 per bay): 13 bays × 3 rails = 39 rails (2x4x8).
Calculate Pickets: (100 ft × 12 in) = 1200 in - 36 in (gate) = 1164 in ÷ 5.5 in/picket = 211.6 + 5% buffer = 223 pickets.
Calculate Concrete: 15 posts × 2 bags = 30 bags.
Fence Materials Formula
Posts = ⌈ Length ÷ Spacing ⌉ + 1 + Gates; Pickets = ⌈ (Length × 12) ÷ Board Width ⌉ × 1.05 Dividing total length by post spacing gives the number of fence bays. Adding 1 yields line posts. Horizontal rails are computed as rails per bay (3 rails for 6ft fences). Picket counts divide net fence length by picket width plus 5% scrap buffer.
Variáveis da Fórmula
Premissas de Cálculo
- Fence posts are buried at least 1/3 of total height in ground with 2 bags of concrete per post hole.
- 6ft privacy fences require 3 horizontal rails (top, middle, bottom) to prevent board warping.
Perguntas Frequentes
Dúvidas comuns sobre reformas e materiaisCalculadora de Cercas de Madeira
How deep should fence post holes be?
Post holes should be dug to at least 1/3 to 1/2 of the above-ground post height. For a 6-foot fence, dig 24 to 30 inches deep (or below your local winter frost line).
How many bags of concrete do I need per fence post?
Plan for two (2) 50 lb bags of fast-setting concrete per standard 4x4 post hole. For gate posts and corner posts carrying extra tension, use 3 bags.
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