(1) Affected
personnel must be notified of the potential failure zone of any tail tree,
intermediate support tree and standing tree anchor.
NOTE: The potential failure zone is that area
which could be impacted by the failure of any part of a tail tree, intermediate
support tree or standing tree anchor as the result of forces or loads imposed
on the tree by guylines, running lines or skylines.
(2) The boundaries of the potential failure
zone must be determined by a competent person.
(3) The boundaries of the potential failure
zone must encompass the area into which the tree or parts of the tree could
fall, slide or roll and all trees, logs, lines and material that could be
impacted by the tree failure.
(4)
Personnel must be in the clear of the turn and out of the potential failure
zone of a standing tree skyline or running line anchor before lines are
tensioned.
NOTE: Personnel may be in the potential failure
zone when minor positioning of the rigging is needed or to set chokers.
NOTE: "Before lines are tensioned" means
before:
(a) Logs are moved or
suspended.
(b) The rigging or
carriage is moved to the landing or returned to the brush.
(c) Lines are tight-lined to clear up the
road.
(d) Any movement or
tightening of the line(s) other than that needed for minor positioning of the
rigging or carriage to set chokers.
(5) Personnel working around tail and
intermediate support trees must be in the clear of the turn and out of the
potential failure zone before lines are tensioned.
NOTE: Personnel may be in the potential failure
zone when minor positioning of the rigging is needed or to set chokers.
(6) If the potential failure zone
cannot be determined, personnel must move at least 1 1/2 tree lengths from the
base of tail and intermediate support trees, and in the clear before lines are
tensioned.
(7) A competent person
must instruct affected personnel in the safe work practices required for work
activity in any potential failure zone. This instruction must identify the:
(a) Boundaries of the potential failure
zone
(b) Potential for the
boundaries of the failure zone to change when line pull and line angles
change.
(c) Limitations or
restrictions for entering or working in the potential failure zone.
