Where space beneath an element is included as part of clear floor or ground space or turning space, the space shall comply with 306. Additional space shall not be prohibited beneath an element but shall not be considered as part of the clear floor or ground space or turning space.
306.2 Toe Clearance.
Space under an element between the finish floor or ground and 230 mm (9″) above the finish floor or ground shall be considered toe clearance and shall comply with 306.2.
306.2.2 Maximum Depth.
Toe clearance shall extend 635 mm (25″) maximum under an element.
306.2.3 Minimum Required Depth.
Where toe clearance is required at an element as part of a clear floor space, the toe clearance shall extend 430 mm (17″) minimum under the element.
306.2.4 Additional Clearance.
Space extending greater than 150 mm (6″) beyond the available knee clearance at 230 mm (9″) above the finish floor or ground shall not be considered toe clearance.
Toe clearance shall be 760 mm (30″) wide minimum.