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    Description

    The fire resistance of a structural building member includes its ability to survive a specified fire without loss of its loadbearing function. For glue laminated timber columns, fire resistance is determined by either subjecting a structural member to a standard fire test or by using one of two accepted calculation methods. For wood structural members, the calculation methods rely on char rates obtained from numerous standard fire tests. The existing calculation methods are limited under United States building codes to calculating fire resistance ratings of 120 minutes or less. However, over the past decade there has been a push towards tall wood buildings and designers desire more exposed wood to be permitted in buildings. This desire, coupled with the recent adoption of code language that permits tall wood buildings up to 18 stories, has resulted in the need to determine char rates for glue laminated timber to use in the fire resistance calculations up to 180 minutes. Here we present the experimental method and initial char rate results of glue laminated columns exposed to the standard fire.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Hasburgh, L.; Bourne, K.; Barber, D. 2021. Determination of char rates for glulam columns exposed to a standard fire for three hours. In: Proceedings of the World Conference on Timber Engineering, August 9-12, 2021, Santiago, Chile. Paper No:TE0206.

    Keywords

    glue laminated timber, glulam, char rate, fire resistance, tall wood

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https://www.fs.usda.gov/treesearch/pubs/62977