what is a finger joint in woodwork

what is a finger joint in woodwork

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A finger joint, also known as a comb joint, is a woodworking joint made by cutting a set of complementary, interlocking profiles in two pieces of wood, which are then glued. The joint resembles the interlocking of fingers between two hands, hence the name "finger joint". The sides of each profile increase the surface area for gluing, resulting in a strong bond, stronger than a butt joint but not very visually appealing. Finger joints are regularly confused with box joints, which are used for corners of boxes or box-like constructions. Finger joints are created by cutting a series of interlocking ‘finger’ slots in each piece of wood and inserting them together. By creating a series of ‘fingers’ to interlock and glue together, there are more sides, therefore the surface area available to glue is larger, making the bond stronger. Finger joints are one of the most common types of joints used in woodworking. Finger-joints are used to join short pieces of wood together to form pieces of greater length. The joint is composed of several meshing wedges or “fingers” of wood in two adjacent pieces and is held together with structural adhesives. Finger-joined lumber is used for both structural and non-structural products. Structural product uses include vertical studs and horizontal plates in residential platform-frame construction and the manufacturing of cross-laminated timber and glue-laminated timber. Non-structural uses include moulding and trim. Finger jointed timber is also used in mass timber, furniture and joinery, benchtops, staircase components, set length lining and internal and external battens.

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