34 Pa. Code § 45.128 - Tenoning machines
If sheet metal is used for guards on cutting heads, saws and exposed moving parts, it shall be not less than 1/8 inch (approximately 11 gauge) in thickness. If cast metal guards are used, the thickness shall be not less than 3/16 inch for cast iron and 5/8 inch for aluminum. The hood of the exhaust system may form part or all of the guard. When so used, the hood shall be constructed of metal of a thickness not less than that specified in this section.
Notes
This section cited in 34 Pa. Code § 45.147 (relating to tenoning machines).
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