Fittings
What is a swivel coupler?
A swivel coupler joins two scaffold tubes at any angle. It is used for bracing, where the diagonal meets the frame at something other than a right angle.
Use this diagram+
Free to use on your own site, in training material or in a course handout, as long as the credit link stays on it. Paste this where you want the diagram to appear.
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<img src="https://scaffoldoptix.co.uk/glossary/swivel-coupler/diagram.svg" alt="swivel coupler — scaffold diagram from ScaffoldOptix" width="880" height="620" loading="lazy">
<figcaption>
<a href="https://scaffoldoptix.co.uk/glossary/swivel-coupler">What is a swivel coupler?</a> — diagram by
<a href="https://scaffoldoptix.co.uk">ScaffoldOptix</a>
</figcaption>
</figure>The coupler has two halves that rotate relative to each other, so it can take a tube at whatever angle a brace happens to run. That flexibility is exactly why it is not the structural fitting — the rated connection is the fixed right-angle one.
Almost every diagonal on a tube and fitting scaffold is fixed with swivels: facade bracing, ledger bracing, plan bracing, rakers.
Because they are used on braces, a missing or loose swivel usually means a brace doing nothing, which is a stability problem rather than a local one.
What goes wrong on site
- Swivels used at load-bearing connections in place of doubles.
- Brace ends coupled to boards or guard rails rather than to the structural members they should connect.
- Swivels left slack so the brace can move, which means it is not bracing anything.