By Related Rule (WAC)

WISHA provides rule guidance to staff through two types of policies:

  1. WISHA Interim Operations and Interpretive Memoranda (WIIM)
  2. WISHA Regional Directives (WRD)

The WIIMs and WRDs do not:

  • Substitute for the rule or requirement referenced
  • Create additional obligations for employers

Policies related to Chapter 296-45, WAC.

WISHA policies in effect as of 10/10/2019. View all policies by Related WAC code.

Referenced WAC Policies

Electrical workers, safety standards for
(Chapter 296-45, WAC)

Electrical Work and Confined Space Under WAC 296-45 & 62 (WRD 18.40)
High Voltage Electrical and Telecommunications Hazards (WRD 18.55)
Tree and Shrub Trimming, Pruning and Removal (WRD 20.75)


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