Complying with ANSI/SPRI ES-1, "Wind Design Standard for Edge
Systems Used with Low Slope Roofing Systems," is required for
edge-metal flashings (except gutters) for low-slope membrane roof
systems in the 2003 and 2006 editions of the International Building
Code (IBC). Therefore, it's important you become familiar with the
ANSI/SPRI ES-1 provides a means for determining design wind
loads and testing wind resistances of metal gravel stops, fascias
and copings. Determining design wind loads at a roof area's
perimeter edges is accomplished by first determining the roof
area's uplift pressure, factoring in an appropriate importance
factor and applying appropriate external pressure coefficients
applicable to roof area perimeter edges.
To determine a roof area's uplift pressure, the standard's
look-up tables, which are based on building height, exposure
category and basic wind speed applicable to the specific building
and roof area being evaluated, can be used. An importance factor is
applied to the velocity pressure, resulting in a value
representative of the design wind-uplift load for...
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