Final answer:
The minimum unobstructed finished interior footprint for a single-use shower without a permanent seat is typically 35.5 inches x 35.5 inches for a square configuration and 30 inches by 60 inches for a rectangular configuration, complying with accessibility standards such as the ADA.
Step-by-step explanation:
The minimum unobstructed finished interior footprint for a single-use shower without a permanent seat is determined by building codes and standards for accessibility. Typically, these standards require a minimum size to ensure that the shower can be used safely and comfortably. For a square configuration, the typical minimum dimension is 900mm x 900mm, which is approximately 35.5 inches x 35.5 inches. For a rectangular configuration, the common minimum size is 30 inches by 60 inches, where the 30-inch width allows for comfortable entry and movement within the shower, and the 60-inch length provides enough space for a person to maneuver.
These dimensions are often guided by organizations such as the Americans with Disabilities Act (ADA) in the United States, which provides clear specifications to ensure accessibility for individuals with disabilities. While these sizes are minimums, larger dimensions can provide increased comfort and accessibility, and may be preferred in some designs. It's always recommended to check with local building codes and ADA requirements when designing or installing a shower to ensure compliance and the safety of all potential users.