Micro=Lam© LVL: A New Alternative for Timber Bridgesby David S. Gromala, Trus Joist Corp, Valdosta, GA, USA,
Sherman A. Nelson, Trus Joist Corp, Valdosta, GA, USA,
Abstract: Laminated veneer lumber (LVL) provides a unique opportunity to obtain large structural members from ever-smaller trees. It provides the added benefit of high treatability. This paper explains the advantages of laminated veneer lumber for exposed structural applications. The discussion focuses on the establishment of design stresses and the special problems of quality control that arise when a product pushes the traditional boundaries for structural wood materials. The paper concludes with reviews of the use of Press-Lam in a bridge erected in 1976 as part of a Forest Service research project, and the planned introduction of Micro equals Lam LVL into experimental Forest Service bridges.
Subject Headings: Wood preservatives | Wood bridges | Laminated materials | Laminating | Forests | Trees
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