California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 7 - General Industry Safety Orders
Group 8 - Points of Operation and Other Hazardous Parts of Machinery
Article 59 - Woodworking Machines and Equipment
Section 4324 - Dust Collection Systems
Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) Use of dust collection systems for the removal of wood dust and chips produced by woodworking machines shall conform to this section.
NOTE: Additional requirements for all mechanical ventilation systems are contained in Section 5143.
(b) Definitions.
(c) Location of dust collectors. Dust collectors having a maximum air-handling capacity greater than 500 cubic feet per minute (cfm) shall be located in accordance with one of the following:
EXCEPTION: Mechanically fed abrasive sanders and abrasive planers that meet all of the following conditions:
EXCEPTION: One enclosureless bag-type dust collector with a maximum air-handling capacity of 1500 cfm may be located within 20 feet of an emergency egress route provided that it is not within 10 feet of an emergency exit.
EXCEPTION: One enclosureless bag-type dust collector with a maximum air-handling capacity of 1500 cfm may be located within 20 feet of the nearest employee workstation.
EXCEPTION: A maximum of two enclosureless bag-type collectors may be located within 20 feet of each other in the same room provided that each collector has a maximum air-handling capacity of 1500 cfm or less.
(d) Bonding and grounding of ducts. Ducts and flexible hoses used to convey air and materials as part of dust collection systems shall be constructed of metal or other conductive material and shall be bonded and grounded to prevent the accumulation of static electricity generated by the airflow. Nonconductive ducts such as PVC pipes shall not be permitted.
EXCEPTION: Nonconductive flexible ducts and hoses may be used for final machine connection in a length not exceeding the minimum required for machine operation provided that bonding to ground is maintained.
(e) Guards and collection hoods. Where a dust collection system is used the guard shall form part or all of the collection hood.
(f) Removal of other refuse. Provision for the removal of refuse shall be made in all operations having refuse too heavy, bulky, or otherwise unsuitable to be handled by the dust collection system.
1.
Repealer and new section filed 10-25-74; effective thirtieth day thereafter
(Register 74, No. 43).
2. New subsection (c) filed 7-17-75;
effective thirtieth day thereafter (Register 75, No. 29).
3.
Amendment of subsection (a) filed 8-15-86; effective thirtieth day thereafter
(Register 86, No. 41).
4. Amendment of section heading and section
filed 11-5-2007; operative 12-5-2007 (Register 2007, No. 45).
5.
Editorial correction of subsection (c)(4) (Register 2008, No.
43).
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.