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Yarding |
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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. |
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Operations include:
- 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. [Reference: Washington State Standards]
- Signaling and Signal Equipment requirements are covered.
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Highlights of the Yarding Requirements:
- No log shall be moved until each employee is in the clear. [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. [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. [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. [1910.266(h)(5)(v)]
- Winching must be done within the stability limits of the machine.
[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. [1910.266(h)(5)(ix)]
Additional Yarding information:
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Go on to Lesson 6
Example of a Skidder
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www.osha.gov
