(1) A competent
person must carefully choose skyline, guyline and running line anchors for
position and strength.
Figure 7-21 -- Stump Tie Back Anchor [Figure not
included. See ED. NOTE.]
(2) A competent person must inspect anchors
while the operation is in progress. When necessary, anchors must be tied back
or changed.
Figure 7-22 -- Stump Twister Anchor [Figure not
included. See ED. NOTE.]
(3) Unstable yarder guyline anchors must be
immediately corrected.
(4) Stump
anchors must be notched to a depth not greater than is necessary to safely
secure the line to the stump.
(5)
Deadman anchors must have:
(a) Straps or
lines equal in strength to the guyline, skyline, or mainline to attach the line
to a deadman.
(b) Deadman anchor
strap or line connectors visible for inspection.
Figure 7-23 -- Deadman Anchor [Figure not
included. See ED. NOTE.]
(6) When a standing tree is used as an
anchor:
(a) The line or strap must be
attached to the base of the tree.
Figure 7-24 -- Tree Tie Back Anchor [Figure not
included. See ED. NOTE.]
(b) The tree must be tied back if it is
within reach of any worker, the landing area, or haul road.
NOTE: In some cases, the base of a standing
tree(s) that is used as an anchor may also need to be tied-back.
(c) Affected personnel must be
notified of the standing tree anchor and the potential failure zone.
NOTE: See the potential failure zone
requirements listed in
437-007-0927(1) through
(7)
(7) The use of machines for anchoring
guylines, skylines, or corner blocks must be done only under the supervision of
a competent person.
Figure 7-25 -- Log Loader Anchor [Figure not
included. See ED. NOTE.]
(a) When
determining if the machine is a suitable anchor, the competent person must
consider:
(A) The size and weight of the
machine.
(B) The size of the line
to be attached.
(C) The type of
logging system to be used.
(D) The
condition of the soil and slope of the ground.
(E) The availability of holding aids, such as
road embankments or stumps.
(F) The
skyline, guyline, or running line angle from the horizontal and
vertical.
(G) Any other factors
which would affect the stability of the machine anchor.
(b) Line attachment points on the machine
must be determined by a qualified person.
(c) Machines that are used as mobile tail
anchors and are stabilized with a guyline(s) must be guyed in accordance with
OAR
437-007-0650(1), (2) and
(3).
Figure 7-26 -- Tailhold Cat Anchor [Figure not
included. See ED. NOTE.]
(8) Rock bolt anchors must be installed,
grouted, tested and maintained in accordance with the manufacturer's
recommendations.
(9) Artificial
earth anchors must be installed and used in accordance with their design
specifications and manufacturer's recommendations.
(10) When using tipping plate anchors:
(a) Guylines, skylines, or mainlines must not
be directly attached to the anchors.
(b) The combined strength of straps or lines
attached to multiple anchors must be equal in strength to the guyline, skyline,
or mainline.
Figure 7-27 -- Tipping Plate Anchor [Figure not
included. See ED. NOTE.]
(c) Shackles used to connect straps to the
anchors must be secured with a safety pin.
NOTE: This connection will not be visible for
inspection.
Notes
Or. Admin. Code
§
437-007-0665
OSHA 5-2003, f. 6-2-03,
cert. ef. 12-1-03; OSHA 2-2005, f. 5-27-05, cert. ef.
6-1-05
Figures referenced are available from the
agency.
Stat. Auth.: ORS
654.025(2)
& 656.726(4)
Stats. Implemented: ORS
654.001 -
654.295
