Tongue and groove

Tongue and groove

Tongue and groove or T&G is a method of fitting similar objects together, edge to edge, used mainly with wood: flooring, parquetry, panelling, and similar constructions. Tongue and groove joints allow two flat pieces to be joined strongly together to make a single flat surface. Before plywood became common, tongue and groove boards were also used for sheathing buildings and to construct concrete formwork.

Each piece has a slot (the "groove") cut all along one edge, and a thin, deep ridge (the "tongue") on the opposite edge. The tongue projects a little less than the groove is deep. Two or more pieces thus fit together closely. The joint is not normally glued, as shrinkage would then pull the tongue off.

For many uses, tongue and groove boards have been rendered obsolete by the introduction of plywood and later composite wood boards, but the method is still used in good-quality flooring. Plywood may also be tongued all round to fit it flush into a framed structure, and plywood for sub-floors used in platform framing is often supplied with tongue and groove edges.

When joining thicker materials, several tongue and groove joints may be used one above the other.

Methods

The tongue and groove may be cut in a number of ways, including:
* A four- or six-head planer (for large quantities)
* A spindle moulder (wood shaper)
* A circular saw bench
* Suitable hand planes: a plough plane for the groove and a tongue plane for the tongue, or a combination plane
* A spindle router

Tongue-in-groove

Tongue-in-groove is similar to tongue and groove, but instead of the tongue forming part of one of the edges, it is loose, fitting between two identical grooved edges. The tongue material may be the same as the pieces either side, or not. For example, plywood flooring is commonly grooved at the edges, and plastic tongues are used to form the joint.

ee also

* Cabinet making
* Carpentry
* Fluting (architecture)
* Gland (engineering)
* Groove (joinery)
* Groove
* Nipple (disambiguation)
* Parquetry
* Slot
* Tongue (disambiguation)
* Wood router
* Woodworking
* Woodworking joints


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Look at other dictionaries:

  • tongue-and-groove — tongue and grooveˈ noun 1. A system of joining boards by fitting a projection along the side of one into a groove in the next 2. These boards • • • Main Entry: ↑tongue * * * adj : joining pieces of wood together by having a long, raised part… …   Useful english dictionary

  • tongue and groove — adj tongue and groove boards fit together by pushing a piece that sticks out along the edge of one board into a hollow area along the edge of another board ▪ tongue and groove floorboards …   Dictionary of contemporary English

  • tongue and groove — ► NOUN ▪ wooden planking in which adjacent boards are joined by means of interlocking ridges and hollows down their sides …   English terms dictionary

  • tongue and groove — noun uncount a series of long flat narrow pieces of wood that you join together along their long edges by fitting a raised part in one into a hole in the next …   Usage of the words and phrases in modern English

  • tongue and groove — noun : a joint made by a tongue on one edge of a board fitting into a corresponding groove on the edge of another board * * * tongue and groove UK US noun [uncountable] a series of long flat narrow pieces of wood that you join together along… …   Useful english dictionary

  • tongue and groove — noun Date: 1860 a joint made by a tongue on one edge of a board fitting into a corresponding groove on the edge of another board • tongue and groove adjective …   New Collegiate Dictionary

  • tongue-and-groove — adjective see tongue and groove …   New Collegiate Dictionary

  • tongue-and-groove — adjective Employing tongue and groove joints …   Wiktionary

  • tongue-and-groove joint — [tuŋ′ n gro͞ov′] n. a kind of joint in which a tongue or tenon on one board fits exactly into a groove in another …   English World dictionary

  • tongue-and-groove joint — tongue′ and groove′ joint n. bui a joint between two boards in which a raised area on the edge of one board fits into a corresponding groove in the edge of the other • Etymology: 1875–80 …   From formal English to slang

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