Instrumented Impactor for Testing Wood-Base Floor Panels

    Volume 18, Issue 4 (July 1990)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 9


    McNatt, JD
    Research Forest Products Technologist and Supervisor Research General Engineer, USDA Forest Service, Madison, WI

    Soltis, LA
    Research Forest Products Technologist and Supervisor Research General Engineer, USDA Forest Service, Madison, WI

    (Received 3 July 1989; accepted 16 January 1990)

    Abstract

    The current ASTM method for evaluating impact resistance (ASTM E 661), which uses a leather bag filled with 14 kg (30 lb) of lead shot, is adequate for comparative rating of panels. Our objective was to obtain a more precise measure of failure initiation. An instrumented steel impactor was developed to evaluate the impact resistance of single-layer wood-base floor panels. Panel materials evaluated were plywood, waferboard (two manufacturers), and oriented strandboard. All were nominally 19 mm (¾ in.) thick with tongue-and-groove edges and were approved for single-layer flooring. Impact resistance tests were conducted on the panels using a 14-kg (30-lb) lead-shot bag, a 14-kg (30-lb) steel impactor, and a 27-kg (60-lb) steel impactor. Floor panel damage was measured by the amount of energy absorbed by the panel, time to maximum deflection, and residual panel deflection (permanent set). The 14-kg (30-lb) impactor proved to be more precise for identifying damage initiation because the 27-kg (60-lb) impactor caused complete failure of some waferboard and oriented strandboard after only two or three drops. For all panel types, the 14-kg steel impactor caused 30 to 40% greater deflection than the 14-kg lead-shot bag for any given drop height.


    Paper ID: JTE12483J

    DOI: 10.1520/JTE12483J

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    Author
    Title Instrumented Impactor for Testing Wood-Base Floor Panels
    Symposium , 0000-00-00
    Committee D07