Splice joint

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A splice joint is a method of joining two members end to end in woodworking. [1] The splice joint is used when the material being joined is not available in the length required. It is an alternative to other joints such as the butt joint and the scarf joint. Splice joints are stronger than unreinenforced butt joints and have the potential to be stronger than a scarf joint.[ clarification needed ] [2]

Contents

Splices are therefore most often used when structural elements are required in longer lengths than the available material. The most common form of the splice joint is the half lap splice, which is common in building construction, where it is used to join shorter lengths of timber into longer beams.

Applications

Types of splice joints

Half lap splice, bevel lap splice and tabled splice joint Splice-joint.svg
Half lap splice, bevel lap splice and tabled splice joint

There are four main types of splice joints: half lap, bevel lap, tabled, and tapered finger.

Half lap splice joint

The half lap splice joint is the simplest form of the splice joint and is commonly used to join structural members where either great strength is not required or reinforcement, such as mechanical fasteners, are to be used.

The joint is cut as for a half lap.

Bevel lap splice joint

The bevel lap is a variation of the half-lap in which the cheeks of the opposing members are cut at an angle of 5 to 10 degrees, sloping back away from the end of the member, so that some resistance to tension is introduced. This helps to prevent the members from being pulled apart.

Tabled splice joint

A wedged tabled splice joint Wedged tabled scarf joint.jpg
A wedged tabled splice joint

The tabled splice joint is another variation of the half lap. The cheeks are cut with interlocking surfaces so that when brought together the joint resists being pulled apart.

Tapered finger splice joint

The tapered finger splice joint requires a series of matching 'fingers' or interlocking prominences to be cut on the ends of opposing members. The joint is brought together and glued, with the fingers providing substantial glue surface.

This joint is commonly used in the production of building materials from smaller offcuts of timber. It is commonly found in skirting, architrave, and fascia.

The joint is usually made by machine.

Related Research Articles

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<span class="mw-page-title-main">Joinery</span> Where pieces of wood are fixed together in an assembly

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<span class="mw-page-title-main">Chisel</span> Tool for cutting and carving

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<span class="mw-page-title-main">Mortise and tenon</span> Woodworking joint

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<span class="mw-page-title-main">Lap joint</span> Woodworking joint

A lap joint or overlap joint is a joint in which the members overlap. Lap joints can be used to join wood, plastic, or metal. A lap joint can be used in woodworking for joining wood together.

<span class="mw-page-title-main">Dovetail joint</span> Woodworking joinery technique

A dovetail joint or simply dovetail is a joinery technique most commonly used in woodworking joinery (carpentry), including furniture, cabinets, log buildings, and traditional timber framing. Noted for its resistance to being pulled apart, also known as tensile strength, the dovetail joint is commonly used to join the sides of a drawer to the front. A series of pins cut to extend from the end of one board interlock with a series of 'tails' cut into the end of another board. The pins and tails have a trapezoidal shape. Once glued, a wooden dovetail joint requires no mechanical fasteners.

<span class="mw-page-title-main">Glued laminated timber</span> Building material

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<span class="mw-page-title-main">Scarf joint</span> Method of joining two members end to end in woodworking or metalworking

A scarf joint, or scarph joint, is a method of joining two members end to end in woodworking or metalworking. The scarf joint is used when the material being joined is not available in the length required. It is an alternative to other joints such as the butt joint and the splice joint and is often favored over these in joinery because it yields a barely visible glue line.

<span class="mw-page-title-main">Finger joint</span> Wedge-shaped connection in wood

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<span class="mw-page-title-main">Japanese carpentry</span> Distinctive woodworking style

Japanese carpentry was developed more than a millennium ago that is known for its ability to create everything from temples to houses to tea houses to furniture by wood with the use of few nails.

<span class="mw-page-title-main">Box joint</span> Type of woodworking joint

A box joint is a woodworking joint made by cutting a set of complementary, interlocking profiles in two pieces of wood, which are then joined (usually) at right angles, usually glued. The glued box joint has a high glued surface area resulting in a strong bond, on a similar principle to a finger joint. Box joints are used for corners of boxes or box-like constructions, hence the name. The joint does not have the same interlocking properties as a dovetail joint, but is much simpler to make, and can be mass-produced fairly easily.

<span class="mw-page-title-main">Jointer</span> Woodworking machine

A jointer or in some configurations, a jointer-planer is a woodworking machine used to produce a flat surface along a board's length. As a jointer, the machine operates on the narrow edge of boards, preparing them for use as butt joint or gluing into panels. A planer-jointer setup has the width that enables smoothing ('surface planing') and leveling the faces (widths) of boards small enough to fit the tables.

<span class="mw-page-title-main">Butt joint</span> Woodworking joint

A butt joint is a wood joint in which the end of a piece of material is simply placed against another piece. The butt joint is the simplest joint. An unreinforced butt joint is also the weakest joint, as it provides a limited surface area for gluing and lacks any mechanical interlocking to resist external forces.

<span class="mw-page-title-main">Bridle joint</span> Woodworking joint

A bridle joint is a woodworking joint, similar to a mortise and tenon, in that a tenon is cut on the end of one member and a mortise is cut into the other to accept it. The distinguishing feature is that the tenon and the mortise are cut to the full width of the tenon member.

This glossary of woodworking lists a number of specialized terms and concepts used in woodworking, carpentry, and related disciplines.

<span class="mw-page-title-main">Butt welding</span> Welding of metal pieces placed end-to-end (butt joint)

Butt welding is when two pieces of metal are placed end-to-end without overlap and then welded along the joint. Importantly, in a butt joint, the surfaces of the workpieces being joined are on the same plane and the weld metal remains within the planes of the surfaces.

References

  1. Katkam, V.; Gowda, C. Venkate; Girish, K. E. (2013-01-01). "Fatigue life estimation for a circumferential joint of the aircraft fuselage structure through stress analysis". National Conference on Challenges in Research & Technology in the Coming Decades (CRT 2013). p. 3.44. doi:10.1049/cp.2013.2563. ISBN   978-1-84919-868-4.
  2. Brown, Azby (2014-01-07). The Genius of Japanese Carpentry: Secrets of an Ancient Woodworking Craft. Tuttle Publishing. ISBN   978-1-4629-1378-7.