Products

The primary component of wood-frame construction is dimension lumber. It forms the structural shell which encloses and divides spaces and to which finishes are applied. In addition to lumber, other wood products are frequently used in the construction of the shell and in the interior and exterior finishes. All of these products are intended for specific uses and are manufactured to meet certain standards.

The lumber that is commonly used for framing is 11/2 to 31/2 in. (38 to 89 mm) thick and is called dimension lumber. Timber is the name given to lumber thicker than 4 1/2 in. (114 mm); there are also decking, boards and finish lumber groupings. Table 6 presents the grades, common grade mixes, principal uses, and grade categories for the various sizes of dimension lumber.

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