October 2012

Reasons for ongoing concern | Tech Today

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Reasons for ongoing concern

FM updates its guidelines for field wind-uplift testing in hurricane-prone regions

by Mark S. Graham
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In July, FM Global revised its Loss Prevention Data Sheet 1-52 (FM 1-52), "Field Verification of Roof Wind Uplift Resistance," which addresses the insurance company's field wind-uplift test requirements for roof system installations in hurricane-prone regions. The July version of FM 1-52 updates and supersedes the previous April 2009 version.

The changes

Initially, the most noticeable change to FM 1-52 is its title: "Field Verification of Roof Wind Uplift Resistance." Previous versions of FM 1-52 were titled "Field Uplift Tests."

A new Table 1 has been added to the data sheet indicating whether the negative pressure test or bonded pull test methods contained in FM 1-52 apply to various roof...

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