![]() ![]() ![]() The joints usually have 7/8” to 1-1/8” long fingers, and the adhesives used are waterproof and creep resistant. These boards are available in sizes up to 2圆 and in lengths up to 12’.Ĭertified Exterior Joints – Lumber with Certified Exterior Joints are not restricted to any type of loading. The adhesives used are water resistant, but Vertical Use Only lumber is only certified for indoor use. Also labeled Stud Use Only, these joints are usually 3/8” to 5/8” long and often have blunt tips. Vertical Use Only – A Vertical Use Only joint has the primary purpose of resisting compression loads. Structural finger joints must exhibit strength values more than twice the design value for the grade. ![]() Manufacturers sample production several times each shift and test for bond strength and adhesive durability. In addition to traditional lumber grading practices, finger jointed lumber is subject to stringent quality control requirements including regular in-plant testing to assure strong, reliable joints. Timber Products Inspection (TP) not only assures the quality of solid-sawn lumber, but we also oversee the production of finger jointed lumber.
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