1. (1) Load-bearing blocks must:

   1. (a) Not be used for lines other than those for which they are constructed.
   2. (b) Be fitted with line guards and be designed and used in a manner that prevents fouling.
   3. (c) Be kept in proper alignment when in use.
   4. (d) Have bearing and yoke pins of a material that will safely withstand the strains imposed and be securely fastened.

   5. (e) Have sheaves of a size designed for the size of the wire rope used.

      EXCEPTION: 437-007-0680(b) and (e) do not apply to small rig-up (Tommy Moore) blocks.

2. (2) Block bearings must be kept well-lubricated.
3. (3) Sufficient corner or tail blocks to distribute the stress on anchors and attachments must be used on all logging systems.
4. (4) Tail, side, or corner blocks used in yarding must be hung in both eyes of straps or in the single eye of a strap or choker that meets the requirements OAR 437-007-0645, Tables 7-7 and 7-8.

5. (5) The yoke pin of haulback blocks must be inserted with the head facing the direction from which the rigging approaches, when the rigging can reach the block.

   [ED. NOTE: 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