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Subchapter 7. General Industry Safety Orders
Group 10. Gas Systems for Welding and Cutting
Article 82. Stationary Automatic Acetylene Generators

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§4805. Inside Generator Rooms or Compartments.

(a) Acetylene Generators shall not be installed in buildings exceeding one story in height, unless they are installed on the top floor or roof.

(b) Generators installed inside buildings shall be enclosed in a separate room. The walls, partitions, floors, and ceilings of inside general rooms shall be of construction having a fire-resistance rating of at least one-hour.

The walls or partitions shall be continuous from floor to ceiling and shall be securely anchored. At least one wall of the room shall be an external wall.

(c) Openings from an inside generator room to other parts of the building shall be protected by a swinging type, self-closing fire door for a Class B opening and having a rating of a least 1 hour. Windows in partitions shall be wired glass and approved metal frames with fixed sash. Installation shall be in accordance with the Standard for the Installation of Fire doors and Windows, NFPA 80-1970.

(d) A portion of the exterior walls or roof equal to not less than 10 percent of combined areas of the enclosing walls and roof shall be of light, noncombustible material, preferably single-strength glass.

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


1. Amendment of subsection (c) filed 3-2-76; effective thirtieth day thereafter (Register 76, No. 10).

2. Amendment filed 7-16-76; effective thirtieth day thereafter (Register 76, No. 29).

3. Amendment filed 6-12-87; operative 7-12-87 (Register 87, No. 26).

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