There is a newer version of the Revised Code of Washington
2005 Washington Revised Code RCW 70.86.030: Standards for design and construction.
Structural frames, exterior walls, and all appendages of the buildings described in RCW
70.86.020, whose collapse will endanger life and property shall be designed and constructed to withstand horizontal forces from any direction of not less than the following fractions of the weight of the structure and its parts acting at the centers of gravity:
Western Washington 0.05.
[1955 c 278 § 3.]
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