Gate Calculator

Overview

Sizes two gate posts, concrete, hinges, latch, and a diagonal brace from gate width, height, post type, and hinge count.

Assumptions

• Brace length is the diagonal of the rectangular gate frame.
• Post-depth guidance is a planning rule, not an engineered footing detail.

Worked example

A 4 × 6 ft gate has a diagonal of sqrt(48² + 72²) = 86.5 in, or 7.21 ft.

Common mistakes

• Installing the diagonal brace from high hinge to low latch.
• Choosing a light post for a heavy or wide gate.

Limitations

It does not calculate gate weight, wind load, hardware rating, or latch compliance.

Safety and local requirements

Check property-line and pool-gate requirements locally; keep gate swing clear of people and traffic.

Sources

• International Code Council — code reference background