Deck height calculator

Deck height calculator helps you determine the optimal height for your deck based on structural requirements, local building codes, and design preferences.

Input Parameters

Calculation Results

Required Deck Beam Height

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Based on the input parameters and standard engineering formulas.

Calculation Formula

h = (P × L²) / (Fb × b × d)

Where:
h = Required beam height (inches)
P = Total load per foot (psf) = Live Load + Dead Load
L = Beam span (feet)
Fb = Allowable bending stress (psi) based on beam material
b = Beam width (inches)
d = Beam depth (inches)

Deck height calculator Calculator Usage Guide

Learn how to use the Deck height calculator calculator and its working principles

How to Use the Calculator

  1. Enter the beam span in feet (the distance between supports).
  2. Enter the live load (weight from people, furniture, etc.) in pounds per square foot (psf).
  3. Enter the dead load (weight of the deck materials) in pounds per square foot (psf).
  4. Select the beam material from the dropdown menu.
  5. Click the "Calculate" button to determine the required deck beam height.
  6. The result will show the nearest standard beam depth in inches.

Understanding the Input Parameters

  • Beam Span: The distance between the supports for the deck beam. A longer span requires a taller beam.
  • Live Load: The weight from people, furniture, and other movable objects on the deck.
  • Dead Load: The weight of the deck materials themselves, including the beam, joists, decking, and any permanent installations.
  • Beam Material: Different materials have different strength properties, affecting the required beam height.

Important Notes

This calculator provides a general estimate for deck beam height. Always consult with a qualified engineer or building inspector to ensure your deck meets all local building codes and safety requirements. The calculator uses standard values for beam dimensions and assumes typical deck construction practices.