Construction clip

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Three historical, forged composite building clips
Two pull clips

A building clamp is a wood connector in the shape of a U-shaped angled iron hook with two pointed ends.


The construction clamp is used for the mostly provisional connection of two wooden components (e.g. wooden beams butting together ). The ends of the construction clips are hammered in alternately with a hammer . The construction clip is often used as an assembly aid and position security in carpenter-style mortise and tenon joints to prevent the connection from slipping before the entire structure is completed.

Long-term use generally only takes place with traditional half-timbered or timber construction, as their oversized beam cross-sections (compared to modern civil engineering) can withstand the use of such a coarse connecting means. In the case of exposed beams on external walls, the construction clamp should only be used temporarily or as an emergency solution, as penetrating water can lead to corrosion of the clamp and rotting of the wood.

In technical assistance , construction clips are used as wood connectors, but also for attaching line connections or as spacers (e.g. when constructing a tripod).


A distinction is made between two types, which are regulated according to DIN 7961:

  • Type A as a pull clip made of 16 mm round iron. Length 300 mm, center height 90 mm.
  • Type C as a composite clip made of flat steel and provided with holes. Length 300 mm, center height 60 mm, width 25 mm.

Manufacturing deviations or special dimensions are possible.

Individual evidence

  1. "Dreibock - the mother of all supporting structures" , accessed on March 18, 2016

Web links

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