1. (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. (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. (3) Unstable yarder guyline anchors must be immediately corrected.
4. (4) Stump anchors must be notched to a depth not greater than is necessary to safely secure the line to the stump.

5. (5) Deadman anchors must have:

   1. (a) Straps or lines equal in strength to the guyline, skyline, or mainline to attach the line to a deadman.

   2. (b) Deadman anchor strap or line connectors visible for inspection.

      Figure 7-23 — Deadman Anchor [Figure not included. See ED. NOTE.]

6. (6) When a standing tree is used as an anchor:

   1. (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.]

   2. (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.

   3. (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. (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.]

   1. (a) When determining if the machine is a suitable anchor, the competent person must consider:

      1. (A) The size and weight of the machine.
      2. (B) The size of the line to be attached.
      3. (C) The type of logging system to be used.
      4. (D) The condition of the soil and slope of the ground.
      5. (E) The availability of holding aids, such as road embankments or stumps.
      6. (F) The skyline, guyline, or running line angle from the horizontal and vertical.
      7. (G) Any other factors which would affect the stability of the machine anchor.
   2. (b) Line attachment points on the machine must be determined by a qualified person.

   3. (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. (8) Rock bolt anchors must be installed, grouted, tested and maintained in accordance with the manufacturer’s recommendations.
9. (9) Artificial earth anchors must be installed and used in accordance with their design specifications and manufacturer’s recommendations.

10. (10) When using tipping plate anchors:

    1. (a) Guylines, skylines, or mainlines must not be directly attached to the anchors.

    2. (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.]

    3. (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.

       [ED. NOTE: Figures referenced are available from the agency.]

Statutory/Other Authority

ORS 654.025(2) & 656.726(4)

Statutes/Other Implemented

ORS 654.001 - 654.295

History

OSHA 2-2005, f. 5-27-05, cert. ef. 6-1-05
OSHA 5-2003, f. 6-2-03, cert. ef. 12-1-03