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    Volume 50, Issue 1 (August 2021)

    Measurement of Pull-Through Resistance of Substrate Boards for Commercial Roofing Using Different Techniques

    (Received 13 March 2021; accepted 26 May 2021)

    Published Online: 03 August 2021

    CODEN: JTEVAB

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    Abstract

    The substrate boards of commercial roofs are secured with mechanical fasteners and plates. The pull-through resistance (PTR) of the substrates depends on the material composition and fastener/plate configuration. Three different testing apparatuses are available for determining the PTR: universal testing machine Instron pull-through (IP), automated pull-through (AP), and manual pull-through (MP). To quantify the accuracy of these three test apparatuses, the National Research Council Canada completed an experimental program. The test matrix consisted of four types of substrate boards: gypsum-based board (GB), perlite-based board (PB), wood-fiber based board (WB), and polyisocyanurate insulation based (IB), two fastener plate geometries (round and hexagonal), and two types of fasteners (#12 and #14). In addition, the effect of operator ability and loading mechanisms were respectively examined for the MP and IP by employing three different operators and two different loading mechanisms, respectively. Experimental error, deviation error, and total deviation values are calculated. The findings are, respectively summarized as follows: (1) Data obtained using IP and AP showed no significant difference in the PTR values. However, the MP results varied with operators. (2) Similarly, neither the size of the specimen, the type of fasteners, nor the fastener plates resulted in significant variation in the PTR values obtained from the three apparatuses. (3) Failure analysis of the substrate boards confirmed that larger specimens absorbed energy elastically by deflecting across the board's longer span whereas smaller specimens dissipated energy by cracking across the board.

    Author Information:

    Jandaghian, Zahra
    National Research Council Canada, Construction Research Center, Ottawa, Ontario

    Saragosa, James
    National Research Council Canada, Construction Research Center, Ottawa, Ontario

    Yew, Helen
    National Research Council Canada, Construction Research Center, Ottawa, Ontario

    Shyti, Flonja
    National Research Council Canada, Construction Research Center, Ottawa, Ontario

    Baskaran, Bas A.
    National Research Council Canada, Construction Research Center, Ottawa, Ontario


    Stock #: JTE20210170

    ISSN:0090-3973

    DOI: 10.1520/JTE20210170

    Author
    Title Measurement of Pull-Through Resistance of Substrate Boards for Commercial Roofing Using Different Techniques
    Symposium ,
    Committee D08