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July 2006
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Edge metal flashings

by Mark S. Graham
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The International Building Code's (IBC's) 2003 and 2006 editions contain a provision that low-slope roof systems' edge metal flashings (copings, fascias, gravel stops) be tested and designed to resist wind loads according to ANSI/SPRI ES-1,"Wind Design Standard for Edge Systems Used with Low Slope Roofing Systems." Following are some ways designers and contractors can address the provision's requirements.

What's required

In IBC's 2003 edition, Section 1504.5-Edge securement for low-slope roofs indicates, "Low-slope membrane roof systems metal edge securement, except gutters, installed in accordance with Section 1507, shall be designed in accordance with ANSI/SPRI ES-1, except the basic wind speed shall be determined from Figure 1609."

Section 1507 describes roof systems' specific material and application requirements. ANSI/SPRI ES-1 describes the method for determining wind loads acting on roof edges and methods for testing edge metal flashings. Figure 1609 is the code's...


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