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Subchapter 7. General Industry Safety Orders
Group 8. Points of Operation and Other Hazardous Parts of Machinery
Article 56. Metal Working Machines

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§4240. Power-Driven and Air-Lift Hammers.

(a) Every steam or air-lift hammer shall have a safety cylinder head to act as a cushion if the rod should break or pull out of the ram.

(b) Air-lift and steam hammers shall be provided with a quick closing emergency valve in the admission pipeline at a convenient location. This valve shall be closed and locked in the off position while the hammer is being adjusted, repaired, or serviced, or when the dies are being changed.

(c) Steam hammers shall be provided with a means of cylinder draining. Air-lift hammers shall be provided with two drain cocks; one on main head cylinder and one on clamp cylinder.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.


1. New section filed 10-25-74; effective thirtieth day thereafter (Register 74, No. 43).

2. Amendment of subsections (a) and (b) filed 3-23-79; effective thirtieth day thereafter (Register 79, No. 12).

3. Amendment of subsection (b) filed 7-8-85; effective thirtieth day thereafter (Register 85, No. 28).

4. Amendment filed 12-16-85; effective thirtieth day thereafter (Register 85, No. 51).

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