A substantial barrier of wood not less than 1 1/2 inches in thickness, or sheet iron not less than 1/8 inch in thickness, shall be provided over the saws. This guard shall come within 6 inches of the saw table. A baffle, constructed of 2-inch-hardwood, shall be accepted in lieu of the guard if more than 6 inches clearance is required.
34 Pa. Code § 45.55