Page 108 - 2018_IPC
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STORM DRAINAGE
For SI: 1 inch = 25.4 mm.
Source: National Weather Service, National Oceanic and Atmospheric Administration, Washington D.C.
FIGURE 1106.1—continued
100-YEAR, 1-HOUR RAINFALL (INCHES) WESTERN UNITED STATES
2018 INTERNATIONAL PLUMBING CODE ® 91
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