Tech Today

Considering the winds
Properly specifying wind design is key to roof system performance

With increasing frequency, NRCA has been receiving reports of roof system designs that include inadequate provisions for wind loads and resistances. Designs that only specify wind speeds, wind warranties or disproportionately high (or low) uplift-resistance classifications are telltale signs of insufficient design considerations for high winds.

Code requirements

Building codes typically provide minimum requirements for determining and reporting design wind loads on a project-specific basis.

For example, in the International Building Code, 2015 Edition,® (IBC), design wind loads should be determined according to Chapter 16—Structural Design. This chapter specifically references the 2010 edition of ASCE Standard 7, "Minimum Design Loads for Buildings and Other Structures." ASCE 7-10 also is referenced in IBC 2012.

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