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Wildland Fire Chain Saw Glossary
Pre-course Work
FEBRUARY, 2004
NFES 2644
Peavey. A lumberman's lever for turning logs that has a pivoting
hooked arm and metal spike at one end.
Pie Shape or Wedge Cut. A section sawn from a tree during the
bucking sequence to allow for the directional pressures of various bind
situations. Splits, slabs, and excessive wood-pulling are minimized when
a pie shaped cut is sawn.
Pivot points. Pivot points can be stumps, rocks or any protrusion
on the ground that affects a log's balance or natural tendency to roll.
An unseen pivot point may cause the ends of the log to swing around the
pivot point.
Plumb. To gauge or assess the various vertical leans of a tree
as part of the sizeup completed prior to felling.
Plumb bob. A tool used to establish the outward lean or slant
of a tree in relation to its base. Generally a weight attached to a string.
PPE. Personal Protective Equipment for eyes, head, and extremities,
protective clothing, respiration devices, and protective shields and barriers.
In addition to PPE required for fireline duties, sawyers and swampers
are also required to use approved chaps, eye and hearing protection.
Progressive Method of Line Construction. A system of organizing
workers to build fireline in which they advance without changing relative
positions in line.
Puller. See Swamper.
Pull-in. Pull-in occurs when the chain on the bottom of the bar
is caught or pinched, and suddenly stops. The chain pulls the saw forward.
Push-back. Push-back occurs when the chain on the top of the
bar is suddenly stopped by contacting another object or by being pinched.
The chain drives the saw straight back toward the sawyer.
Pusher or Driver. Use of a tree to drive or push over another
tree that has not completely fallen to the ground but has been faced and
backcut. This is a forbidden technique for fireline operations. Machines
should be used to mitigate this hazard.
Root Pull. The pulling out of a portion of the tree's root system.
Commonly a result of not cutting up the corner of the holding wood close
enough on a large or heavily leaning tree (common on soft or saturated
ground).
Root Wad. Mass of roots and dirt which projects above ground level
after a tree has been pushed or blown over.
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