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The effect of heat treatment on the withdrawal capacity of screws in spruce wood

Mirko Kariž and Manja Kitek Kuzman and Milan Šernek The effect of heat treatment on the withdrawal capacity of screws in spruce wood. Bioresources, 8 (3). pp. 4340-4348. ISSN 1930-2126

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    The withdrawal capacity of screws in heat-treated spruce wood (Picea abies Karst.) was measured in the radial and tangential directions. Wood was heat-treated at temperatures of 150, 170, 190, 210, and 230°C. Screw withdrawal capacity decreased as the degree of thermal modification was increased. Also,image analysis was used to measure the size of the deformed wood area around the screw, which increased with higher thermal modification temperatures. This leads to the practical recommendation that connections in heat-treated wood should be constructed with screws with larger diameters and deeper penetration. Moreover, larger spacing between screws is needed to ensure sufficient withdrawal capacity compared to non-treated wood

    Item Type: Article
    Keywords: deformed area heat treated spruce image analysis screw withdrawal capacity
    Link to COBISS: http://www.cobiss.si/scripts/cobiss?command=SEARCH&base=COBIB&select=ID=2119817
    Divisions: Biotechnical Faculty, Department of Wood Technology > Chair of adhesive bonding, wood composites and surface treatment
    Item ID: 1550
    Date Deposited: 30 Nov 2015 12:47
    Last Modified: 30 Nov 2015 12:47
    URI: http://eprints.gozdis.si/id/eprint/1550

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