Introduction to CLT, Product Properties, Strength Classes

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We introduce briefly the product cross laminated timber (CLT) and outline the development and basics of this European engineered timber product, innovated to be used as large-sized stand-alone structural element for load-bearing purposes. The main focus of our contribution is to present and discuss properties of side face bonded homogeneous CLT made of Norway spruce. A strength class system and corresponding characteristic properties of CLT exposed to loads in- and out-of plane are presented. Background documents are referenced. In view of a concerted standardization system the characteristic properties are linked with adequate test configurations and reference dimensions of the base material and the product itself. The concertation of product properties, reference dimensions & conditions with adequate test configurations is a prerequisite and the basis for harmonization and international standardization of this innovative timber product of meanwhile global interest. Final remarks and an outlook conclude this contribution.
Original languageEnglish
Title of host publicationCross laminated Timber – a competitive wood product for visionary and fire safe buildings: Joint Conference of COST Actions FP1402 and FP1404
Publication statusPublished - Mar 2016

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