International Beams engineered wood I-Joists are listed with Intertek Testing Services (ITS – Warnock Hersey division) which applies in both the United States and Canada. 45 minute, two-hour and several 1-hour floor-ceiling separation assemblies are included in the listing.
To download and review the ITS – Warnock Hersey listing, click on the Warnock Hersey logo to the right. The listing is also available for free download at Spec-Direct as part of a cooperative agreement between ITS and Spec-Direct.
International Beams I-joists are jointly audited by APA and ITS as part of the agreement with ITS for the fire-rated assemblies listing. Additional floor-ceiling fire rated assemblies are available in the model building codes. See International Beams Commercial Design Manuals for further discussion.