R405 — Knee and Toe Clearance

R405.1 General. Where space beneath an element is included as part of a clear space, the space shall comply with R405. Additional space shall not be prohibited beneath an element but shall not be considered as part of the clear space. R405.2 Toe Clearance. Toe clearance shall comply with R405.2. R405.2.1 General. Space under an element between the ground surface and 9 inches (230 mm) above the ground surface shall be considered toe clearance and shall comply with R405.2. R405.2.2 Maximum Depth. Toe clearance shall extend 25 inches (635 mm) maximum under an element. R405.2.3 Minimum Required Depth. Where toe clearance is required at an element as part of a clear space, the toe clearance shall extend 17 inches (430 mm) minimum under the element. R405.2.4 Additional Clearance. Space extending greater than 6 inches (150 mm) beyond the available knee clearance at 9 inches above the ground surface shall not be considered toe clearance. R405.2.5 Width. Toe clearance shall be 30 inches (760 mm) wide minimum. R405.3 Knee Clearance. Knee clearance shall comply with R405.3. R405.3.1 General. Space under an element between 9 inches (230 mm) and 27 inches (685 mm) above the ground surface shall be considered knee clearance and shall comply with R405.3. R405.3.2 Maximum Depth. Knee clearance shall extend 25 inches (635 mm) maximum under an element at 9 inches (230 mm) above the ground surface. R405.3.3 Minimum Required Depth. Where knee clearance is required under an element as part of a clear space, the knee clearance shall be 11 inches (280 mm) deep minimum at 9 inches (230 mm) above the ground surface, and 8 inches (205 mm) deep minimum at 27 inches (685 mm) above the ground surface. R405.3.4 Clearance Reduction. Between 9 inches (230 mm) and 27 inches (685mm) above the ground surface, the knee clearance shall be permitted to reduce at a rate of 1 inch (25 mm) in depth for each 6 inches (150 mm) in height. R405.3.5 Width. Knee clearance shall be 30 inches (760 mm) wide minimum.