🏛 Beam & Column Calculator PRO
Determine beam depth, width, column size, rebar count, and material cost for wood, steel, or concrete structures.
Dimension Diagram — updates as you type
Simply supported beam elevation. Span and load set the depth; columns carry it to the footing.
1 Beam Specifications
2 Column Specifications
Higher safety factors recommended for seismic zones and high-wind areas.
Results
Beam Sizing
Column Sizing
Reinforcement (Concrete)
Weight & Cost
⚠️ Pre-Export Checklist
- Structural engineer review recommended for spans >16 ft
- Live and dead loads verified per local building code
- Connection details and bearing conditions specified
- Lateral bracing requirements confirmed
- Seismic zone and wind load requirements checked
- Building permit obtained
- Material grade and specifications confirmed with supplier
Professional Structural Sizing Guide
📐 Formulas & Engineering Standards ▼
Wood Beam (IRC Rule of Thumb)
Depth (in) = Span (ft) × 1.5
Width (in) = Depth ÷ 2
Suitable for residential loads up to 40 psf. Verify with span tables for specific species and grades.
Steel Beam (AISC)
Required Section Modulus S = (M × 12) / Fb
Where M = Load × Span² / 8 (moment)
Select W-shape beam with section modulus exceeding calculated value.
Concrete Beam (ACI 318)
Depth (in) = Span (ft) × 1.2 (min)
Width (in) = Depth ÷ 2 (min)
Rebar: 4 bars minimum for beams, 4 bars for columns. Stirrups at d/2 spacing.
Column Sizing
Wood: 4×4 min for 1 story, 6×6 for 2 story
Steel: W6×15 to W8×31 depending on load and height
Concrete: 12"×12" min for residential, 16"×16" for commercial
💡 Pro Tips ▼
- Always oversize by 10-20% to account for notching, drilling, and load variations.
- Wood beams can lose 50% strength if notched — avoid notching beyond midspan.
- Steel beams require fire protection in most commercial applications.
- Concrete columns need confinement reinforcement (ties/stirrups) for seismic zones.
- Consult a structural engineer for spans over 20 ft or non-residential loads.
Drag to rotate — Scroll to zoom
Calculadoras Relacionadas
Frequently used together on the same project.
Client & Quote (prints on PDF & Excel)
Adjustments (applies to exports)
Contingency is added as a separate line on the exported cost summary. Waste % is printed as an advisory reminder.
Project notes (prints on PDF & Excel)
Result compare (A/B)
| Item | Pinned | Current | Change |
|---|---|---|---|
Saved rates auto-apply from your Price Library. Advanced details stay in your browser — nothing is uploaded except inside your own PDF/Excel exports.
📖 Como Usar a Calculadora
Insira o vão da viga.
Selecione o material.
Insira a carga permanente.
Insira a carga acidental.
Clique em Calcular.
Revise a análise detalhada.
📐 Fórmulas de Projeto
⚠️ Erros Comuns
Subestimar cargas.
Ignorar limites de deflexão.
Não considerar cargas pontuais.
Selecionar apenas por resistência.
Ignorar detalhes de conexão.
💡 Dicas Profissionais
Consulte um engenheiro para vãos maiores que 6 metros.
Considere cargas futuras.
Use produtos de madeira engenheirada para vãos longos.
Verifique códigos locais.
Planeje o posicionamento cedo.
Considere critérios de vibração.
Use a seção mais leve que atenda todos os requisitos.
❓ Perguntas Frequentes
Depende do vão, cargas e material. Regra geral, vigas de madeira típicas são 200 a 300mm de profundidade.
Vigas de aço oferecem maior relação resistência-peso e vãos maiores. Vigas de madeira são menos custosas.
Depende do tamanho, material e vão. Uma viga de aço típica suporta 15 a 25 kN por metro.
Limites comuns são vão/360 para carga acidental e vão/240 para total.
Sim, se projetadas e conectadas adequadamente. Esta abordagem pode ser mais econômica.
🏗️ Aplicações Reais
Use nossa calculadora para estimar tamanhos, capacidades de carga e requisitos de materiais.
✅Method, Sources & Review
Maintained by theBuildingCalc methods desk· Last reviewedSeptember 23, 2026. This calculator implements the standards and references below; every figure can be rechecked against the formulas and worked example on this page.
Results are estimates, not engineering advice. Verify against local codes and licensed professionals for structural, electrical, and gas work. See ourTerms. Spotted an error? Report it— corrections ship with the next review.