UP - logo
Univerza na Primorskem Univerzitetna knjižnica - vsi oddelki (UPUK)
PDF
  • Evaluation of low-grade yellow-poplar (Liriodendron tulipifera) as raw material for cross-laminated timber panel production
    Azambuja, Rafael ; DeVallance, David Brian ; McNeel, Joseph
    Utilization of low-grade yellow-poplar (Liriodendron tulipifera) lumber would provide for alternative structural lumber sources and promote the growth of cross-laminated timber (CLT) manufacturing ... facilities within the Appalachian Region. A significant amount of low-grade yellow-poplar lumber (i.e., National Hardwood Lumber Association [NHLA] No. 2A and Below Grade) is utilized for wood pallets. In practice, this material is not graded for structural purposes. Additionally, research on yellow-poplar for structural use has focused on grading lumber from a small population of selected logs, not by regrading NHLA lumber from manufacturing facilities. Therefore, the research’s objective was to investigate the structural grades of a typical population of NHLA graded No. 2 and lower lumber and evaluate their potential to meet structural grades necessary for CLT panels. NHLA graded lumber was regraded and assigned to visual structural grades following Northeastern Lumber Manufacturers Association rules and evaluated for flatwise bending modulus of elasticity (MOEb) by nondestructive proof loading. The results of the study indicated that 54.6 percent of the boards possessed a minimal structural visual grade required for CLT panels according to American National Standards Institutes/The Engineered Wood Association (ANSI/APA) PRG 320-2019 (2020). Splits were the most common limiting defect that downgraded boards to nonstructural grades. Also, 96.6 percent of the boards evaluated had a MOEb above the required minimal board value of 1.23106 psi (8,274 MPa) listed in ANSI/APA PRG 320-2019 (2020). The results of the study indicated that a majority of NHLA low-grade yellow-poplar, when regraded for structural purposes, meets or exceeds minimum lumber grade values necessary for use in CLT panel production.
    Vir: Forest products journal. - ISSN 0015-7473 (Vol. 72, no. 1, 2022, str. 1-10)
    Vrsta gradiva - članek, sestavni del
    Leto - 2022
    Jezik - angleški
    COBISS.SI-ID - 93562115

    Povezava(-e):

    https://meridian.allenpress.com/fpj/article/72/1/1/475556/Evaluation-of-Low-Grade-Yellow-Poplar-Liriodendron
    https://doi.org/10.13073/FPJ-D-21-00050
    DOI

vir: Forest products journal. - ISSN 0015-7473 (Vol. 72, no. 1, 2022, str. 1-10)

loading ...
loading ...
loading ...

Vnos na polico