AFA Gate Automation Certification Practice Test 2026 - Free Gate Automation Practice Questions and Study Guide

Entrapment zones around a sliding gate define the vertical range in which a person could be caught as the gate moves. This zone extends up to six feet above grade, which is the height used in safety standards to determine where safeguards must actively stop the gate if an obstruction is detected. A six-foot limit balances typical human reach and the practicality of safeguarding devices like safety edges, sensors, and interlocks within that range. Choices that are smaller would leave part of the hazard unprotected, while larger numbers aren’t aligned with the standard definition of the entrapment envelope for slide gates.