What is finger-joined lumber?
Finger-joined products are made by taking shorter pieces of lumber, machining a “finger” profile in each end of the short pieces, adding an adhesive and squeezing the short pieces together to make a longer piece of lumber. Like other engineered wood products, finger-joined lumber is becoming popular as a result of its dimensional stability, as well as the straightness that results from stable short lengths being combined during manufacturing. Finger-joined products are subject to structural tests to ensure they meet the requirements set out by the North American lumber grading system.