LVL Durability and Use Classes for Different Moisture Environments
Hazard Classes have now been replaced by Use Classes (see updated EN 335:2013) but are currently only listed for plywood and OSB. APA plywood is suitable for classes 1-3 and these are also applicable for LVL. Specific LVL Use Classes will be available when the current review of LVL standards is completed. Click here for a full list.
For maximum biological durability, both Service Classes and Use Classes must be considered when specifying US wood-based panels. APA has produced this guide to help you align Use Classes and Service Classes. Also see plywood Use Class definitions in EN 636:2012+A1:2015.
Use Classes are based on different environmental exposures that can make the panel susceptible to deterioration. Eurocode 5, are used for assigning strength values and calculating deformation in load bearing situations., as given in
DDCEN/TS 1099 also provides info on factors affecting durability and the relevant biological durability clauses in EN 14279:2004 – Laminated Veneer Lumber (LVL) – Definitions, classification and specification are: 5.3.2, 5.4.2 and 5.5.2.