Ontario Building Code Practice Exam 2026 - Free Building Code Practice Questions and Study Guide

The minimum height required for a guardrail on a ramp in an industrial building is set to ensure the safety of individuals using the ramp. In the context of the Ontario Building Code, guardrails are intended to prevent falls from elevated surfaces, and the height specified reflects a balance between ensuring safety and allowing for accessibility.

The correct height of 900 mm ensures that the guardrail provides adequate protection without being too high to obstruct individuals, especially those using the ramp for mobility such as wheelchairs or other assistive devices. This height is often seen as a standard for safety measures in various building types, including industrial settings where the movement of personnel and equipment is common.

Greater heights, such as 1000 mm, 1100 mm, or 1200 mm, are usually more appropriate for circumstances where greater fall risks are present, such as open stairways or balconies in residential or commercial buildings, but do not apply to typical industrial ramps according to the code's requirements.