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Design Data
Washington State Weathering Regions Map and Snow Load Design Requirements for Selected Counties and Cities
Source - Based on ASTM C62 and MIW Survey of Building Officials
Click on West or East half for enlarged detail.
Snow load requirements are indicated in PSF (pounds per square foot)
Requirements for building brick (from ASTM C62, reprint in part) weathering regions.
N = Negligible Weathering
M = Moderate Weathering
S = Severe Weathering
The NW Masonry Guide Table of Contents
Masonry Institute of Washington
Washington State Conference of Mason Contractors
