(1) Each profile, swing-head and back-knife lathe must have all cutting heads covered by a solid metal guard.

(2) If sheet metal is used, it must be not less than ten U.S. gauge in thickness. If cast metal is used, it must be not less than three-sixteenths inch thick, or if aluminum is used, it must not be less than five-eighths inch thick. The hood of the exhaust system may form part or all of the guard. When so used, the hood must be constructed of metal of a thickness not less than that specified above.

(3) Pail and barrel lathes must be guarded in accordance with the specifications for profile and back-knife lathes insofar as they are applicable.

(4) The requirements of WAC 296-806-450, Lathes, must be applicable to pail and barrel lathes.