APAwood – Europe

The leading resource for information about engineered wood products for the UK and Europe

About APA

Products & Trademarks

Official Guidelines

Green Topics

Applications

Contact us

LVL Durability and Use Classes

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Hazard Classes have now been replaced by Use Classes (see updated EN 335:2013) but are currently only listed for plywood and OSB.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. , as given in Eurocode 5, are used for assigning  strength values and calculating deformation in load bearing situations.

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.