Manual Operations » Yarding
The movement of felled trees to the landing area can present hazards to employees from both skidding or cable operations. Hazards to employees from the movement of logs and inadvertent release of the cables from the logs can be controlled by following OSHA regulations.
- Grapple/Cable Skidders are machines used to tow the logs to the landing. They are covered by the general requirements for logging machines.
- Examples of Cable Yarding Systems are provided. Although they are addressed by some state standards, they are not covered by the OSHA standard. [See Washington State Safety Standards for Logging Operations.]
- Signaling and Signal Equipment requirements are covered.
Highlights of the Yarding Requirements:
- No log shall be moved until each employee is in the clear. [29 CFR 1910.266(h)(5)(i)]
- Generally, chokers must be hooked and unhooked from the end of the log on the uphill side, but if the choker is hooked or unhooked from the downhill side, the log must be securely chocked to prevent movement. [29 CFR 1910.266(h)(5)(ii)]
- Towed equipment must be attached to each machine or vehicle in such a manner as to allow a full 90-degree turn of the equipment. [29 CFR 1910.266(h)(5)(vii)]
- Each employee must be in the clear, and the yarding machine operator must have clearly received and understood the signal to move the yarding line before logs or yarding lines are moved. [29 CFR 1910.266(h)(5)(v)]
- Winching must be done within the stability limits of the machine. [29 CFR 1910.266(h)(5)(iv)]
- Each yarded tree must be placed in a location that does not create a hazard for an employee. This must be done in an orderly manner so the trees are stable before bucking or limbing is begun. [29 CFR 1910.266(h)(5)(ix)]
- 29 CFR 1910 Subpart R, Special industries. OSHA Standard.
- Logging. OSHA Preamble to Final Rules, (1994).
- Logging Operations. OSHA Federal Register Final Rules 60:47022-47037 (September 8, 1995). Amends the logging operations standard. [See Paragraph (h)(5)(v) -- Yarding.]
Example of a Skidder