1. (1) In highlead logging, chokers must be at least one size smaller than the mainline.

2. (2) Straps must be equivalently sized for the line they support, e.g., Extra Improved Plow Steel (EIPS) line requires EIPS straps or equivalent strength material.

   Figure 7-14 — Straps — Line Tension [Figure not included. See ED. NOTE.]

3. (3) Straps or chokers used at or near the ground to hang or support blocks, jacks, tree shoes, or rigging must be sized in accordance with Table 7-7.

   Table 7-7 — Strap Sizes For Rigging At Or Near The Ground [Table not included. See ED. NOTE.]

4. (4) Straps or chokers used to hang or support blocks, jacks, tree shoes, or rigging in tail and intermediate trees must be sized in accordance with Table 7-8.

   Table 7-8 — Strap Sizes For Rigging Hung In Tail and Intermediate Support Trees [Table not included. See ED. NOTE.]

5. (5) When a two part strap or two chokers are used to hang a block, jack, tree shoe, or rigging both eyes or ends must be under approximately equal tension.

   Figure 7-15 — Straps — Line Tension Bridal [Figure not included. See ED. NOTE.]

6. (6) When two equal length chokers are used to hang a block, jack, tree shoe, or rigging in lieu of one choker to gain extra breaking strength, they must be:

   1. (a) Arranged as a swede-type connection.
   2. (b) Considered as a block hung in two eyes for Table 7-8.
7. (7) For straps hung in trees where the interior angle or angles create excessive loading on the strap as shown in Figure 7-14 additional precautions must be taken, such as using a larger strap, lightening loads, moving the carriage ahead on the line, and so forth to reduce the load on the strap.
8. (8) Straps made of synthetic materials must be arranged so the straps cannot ride up or down from their intended position.

9. (9) Straps made of synthetic materials must be used and replaced in accordance with the manufacturer’s recommendations.

   [ED. NOTE: Figures and Tables 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 5-2003, f. 6-2-03, cert. ef. 12-1-03