Tech Today

Updated guidelines

FM Global (FM) has updated its Loss Prevention Data Sheet 1-29, "Roof Deck Securement and Above-deck Roof Components," which provides general design guidance regarding wind resistance for membrane roof assemblies on highly protected buildings insured by the company.

FM 1-29's revisions

A revised edition of FM 1-29 was published in January, and an updated version containing some editorial changes was published in April. The document's previous edition was published in September 2010.

With the latest changes, FM 1-29 has been completely reformatted, revised and expanded. The revised scope of the data sheet indicates it provides guidance to structural engineers for determining the proper span and securement of roof decks to supporting members to provide wind resistance. The data sheet also provides roofing professionals with guidance regarding the proper design and installation of above-deck roof components for wind resistance and fire classification.