Florida Building Code Practice Exam

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Circular or curved stairways must have a minimum clear tread depth of what measurement?

6"
7-1/2"
11"
12"

The correct answer is: 11"

The minimum clear tread depth for circular or curved stairways is indeed 11 inches. This requirement is established to ensure safety and usability. A sufficient tread depth provides adequate space for individuals to comfortably place their feet when ascending or descending the stairs, reducing the risk of slips or falls. In circular or curved stairways, where the geometry is less forgiving than standard straight stairs, the need for a deeper tread helps accommodate the arc of the step and aligns with the guidelines to promote safety and accessibility. Ensuring that treads are at least 11 inches deep is a critical component of stair design as outlined in the Florida Building Code. This design consideration supports safe movement and meets the expected standards for both residential and commercial applications. Other measurements listed do not meet the minimum requirement, making them inadequate for maintaining safety on curved or circular stairways.