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American Wood Council

MAT252-1 Code Applications for Nail-laminated Timber, Glued-laminated Timber and Cross-laminated Timber


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This presentation will focus on Nail-laminated Timber (NLT), Glued-laminated Timber (GLT) and Cross-laminated Timber (CLT) structural framing members.  NLT and GLT has been adopted in the IBC and utilized throughout the world for several decades on a wide variety of buildings.  Often selected for aesthetic reasons or its unparalleled design flexibility, both offer superior structural performance combined with long term durability.  CLT has been recently incorporated in AWC's National Design Specification® (NDS®) for Wood Construction 2015 as well as ICC’s 2015 International Building Code (IBC).  It has been used for over a decade in other parts of the world such as Europe and Australia and has recently made its way into North America.  Similar to NLT and GLT, in addition to its structural capabilities, CLT is specified for aesthetic appeal, structural simplicity and speed of construction.  Additionally, all three products offer sustainable qualities as they are manufactured from a renewable resource and store carbon.  Structural and fire protection characteristics of NLT, GLT and CLT will be discussed as well as IBC code provisions that allow their specification in both residential and commercial applications for a wide variety of occupancies.

Upon completion, participants will be better able to:

  1. Be able to identify code acceptance of nail-laminated timber, glued-laminated timber and cross-laminated timber.
  2. Become familiar with a number of technology advances and standards related to nail-laminated timber, glued-laminated timber and cross-laminated timber.
  3. Improve design knowledge on building systems made with new types of mass timber products.
  4. Become acquainted with the unique fire resistive characteristics of nail-laminated timber, glued-laminated timber and cross-laminated timber as it influences the use of wood in building construction.
  5. Understand the application of NDS Chapter 16 which can be utilized to design up to 2-hours of fire-resistance for exposed wood members.

Equivalencies: 2.0 Hours of Instruction = 0.2 Continuing Education Units (CEU) = 2 Professional Development Hours (PDH)=2 Learning Units (LU)

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