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Restrained vs Non-Restrained

SUBJECT: UL and ICC Restrained Beam Rating Requirements

Recently there has been numerous inquiries as to the correct use of the of Restrained
Beam ratings in accordance with International Building Code (IBC) and Underwriters
Laboratories, Inc. (UL) guidelines.

In order to determine if your building construction is restrained, Section 703.2.3
restrained classification in the 2006 International Building Code indicates the following:

“Fire-resistance-rated assemblies tested under ASTM E 119 shall not be


Factory-mixed, dry formulation of gypsum or portland cement binders, additives, and lightweight mineral or synthetic aggregates mixed with water at Project site to form a slurry or mortar for conveyance and application.