R 408.10664 Ramps.

Rule 664. (1) A ramp may be a component in a means of egress when it conforms to the requirements of this part. A ramp which is constructed after June 15, 1990, and which is less than the minimum measurements prescribed in this rule shall not be considered as an approved part of a means of egress. (2) A ramp and the platforms and landings associated therewith shall be designed for not less than 100 pounds per square foot live load. (3) The slope of a ramp shall not vary between landings. A landing shall be level and the changes in direction of travel, if any, shall be made only at landings. (4) A ramp in a building that is more than 3 stories in height shall be made of noncombustible construction. A ramp floor and landings shall be solid and without perforations. (5) A ramp shall have a nonslip surface. (6) A ramp shall have a minimum width of 44 inches and a maximum slope of 1 inch in 12 inches.