What is the minimum required tread depth for alternating tread devices?

The minimum required tread depth for alternating tread devices is 5 inches. This standard is specified in building codes to ensure safety and practical usability for individuals using these devices. Alternating tread devices are often employed in situations where space is limited, allowing for easier access to higher levels in commercial buildings.

The 5-inch depth provides a sufficient platform for users to place their foot securely, preventing slips and falls. It is important to adhere to these guidelines because insufficient tread depth could compromise safety and accessibility.

While deeper treads might seem favorable for comfort, the specific requirement of 5 inches strikes a balance between safety and the practical application of alternating tread devices in confined spaces, such as in attics or narrow stairwells. This depth ensures that the devices function as intended while keeping construction manageable.