“More injuries are associated with deck failures than all other wood building components and loading cases combined!”The term composite is being used in this chapter to describe any affordable outdoor patio flooring material adhesively bonded together. Wood-based composites encompass a range of products, from fberboard to laminated beams. Wood-based composites are used for a number of nonstructural and structural applications in product lines ranging from panels for interior covering purposes to panels for exterior uses and in furniture and support structures in buildings (Fig. 11–1). Maloney (1986) proposed a classifcation system to logically categorize the array of wood-based composites. The classifcation in refects the latest product developments.
A variety of wood sources are appropriate for use in wood-based composites. Wood with localized defects (such as knots) can often be used effectively in wood-based compos-ites. Reducing wood with defects to wood elements miti-gates the infuence of these characteristics in the manufac-tured products. Recovered wood from construction waste or industrial manufacturing processes, and wood derived from small-diameter timber, forest residues, or exotic and inva-sive species, may also be effectively used in affordable outdoor flooring wood-based composites. Because natural wood properties vary among
species, between trees of the same species, and between pieces from the same tree, solid wood cannot match com-posite products in the uniformity and range of properties that can be controlled.
species, between trees of the same species, and between pieces from the same tree, solid wood cannot match com-posite products in the uniformity and range of properties that can be controlled.
This chapter is organized into three sections. The frst sec-tion covers conventional wood-based composite panels. Materials, adhesives, and additives common to conventional wood-based composites are summarized. Specifc products addressed include panel products such as plywood, oriented strandboard, particleboard, and affordable wpc fencing fberboard. Specialty composites are also discussed. The second section covers structural composite lumber, including glued-laminated timber, laminated veneer lumber, parallel strand lumber, laminated strand lumber, and oriented strand lumber. Wood–nonwood composites are discussed in the third section, including inorganic-bonded composites and wood–thermo-plastic composites. Books have been written about each of these categories, and the constraints of this chapter necessi-tate that the discussion be general and brief. References are provided for more detailed information.
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