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Text from the OSHA Logging Compliance Directive, CPL 2-1.22 Text from the OSHA Logging Compliance Directive, CPL 2-1.22

J.  Definitions and clarifications

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e. Paragraph (f)(3)(vii) and (viii) Machine cab enclosures. OSHA has revised the final rule to require that logging machines manufactured after August 1, 1996, shall have cabs which are completely enclosed, including entrances (paragraph (f)(3)(viii). The machine cab may be enclosed either with mesh material (with openings no greater than 2 inches (5.08 cm) at its least dimension) or with other material(s), provided the employer demonstrates that the alternative provides visibility and protection from penetrating objects which is equivalent to mesh material.

(1) For those logging machines manufactured on or before August 1, 1996, paragraph (f)(3)(viii) provides that such machines may either comply with paragraph (f)(3)(vii) or be equipped with a protective canopy for the operator which meets the following requirements:

a. The protective canopy shall be constructed to protect the operator from injury due to falling trees, limbs, saplings or branches which might enter the compartment side areas and from snapping winch lines or other subjects;

b. The lower portion of the cab shall be fully enclosed with solid material, except at entrances, to prevent the operator from being injured from obstacles entering the lab;

c. The upper rear portion of the cab shall be fully enclosed with open mesh material with openings of such size as to reject the entrance of an object larger than 2 inches in diameter. It shall provide maximum rearward visibility; and

d. Open mesh shall be extended forward as far as possible from the rear corners of the cab sides so as to give the maximum protection against obstacles, branches, etc., entering the cab area.

(2) If the cab enclosure or any other item is attached to a ROPS, the attachment shall not affect the function or performance of the ROPS.

(3) Materials that satisfy the performance criteria of the Society of Automotive Engineers SAE J1084, April 1980, "Operator Protective Structure Performance Criteria for Certain Forestry Equipment" are deemed to comply with the Logging Operation standard.

NOTE: OSHA intends the term "cab" to include any machine operator station, even if it is not a total enclosure providing weather and other protection.

f. The employer must assure that any machine used for logging operations is in compliance with the other provisions of paragraph (f)(3). For example, all machines used in logging operations must have two means of egress. To the extent that any machine in service does not have a second means of egress, the machine must be retrofitted (e.g., replacing the stationary windowshield with a hinged window to allow egress) or removed from service.

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