2013 Forest Service Outdoor Recreation Accessibility Guidelines (FSORAG)

4.2.6 Clear Floor or Ground Space.

At least 48 inches (1220 mm) by 48 inches (1220 mm) of clear floor or ground space shall be provided on all usable sides of fire rings, grills, fireplaces or woodstoves. This space must be adjacent to the ORAR but may not overlap the ORAR, due to safety considerations.

Exception. The clear floor or ground space at fire rings, grills, fireplaces, or woodstoves may be reduced to no less than 36 inches (915 mm), where a condition for an exception in section 1.1 exists.