Bracing
What is a plan brace?
A plan brace is a diagonal in the horizontal plane of a scaffold, keeping the structure square when seen from above.
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.
<figure>
<img src="https://scaffoldoptix.co.uk/glossary/plan-brace/diagram.svg" alt="plan brace — scaffold diagram from ScaffoldOptix" width="880" height="620" loading="lazy">
<figcaption>
<a href="https://scaffoldoptix.co.uk/glossary/plan-brace">What is a plan brace?</a> — diagram by
<a href="https://scaffoldoptix.co.uk">ScaffoldOptix</a>
</figcaption>
</figure>The third axis. A scaffold can be braced perfectly in both vertical planes and still go out of square on plan, which is what a plan brace prevents.
They matter most on structures that are not tied along their whole length, on birdcages, and on free-standing arrangements where there is nothing holding the plan shape but the scaffold itself.
On a tied facade scaffold the building itself does much of this job, which is why plan bracing is more prominent on independent and internal structures.
What goes wrong on site
- Assumed unnecessary because the vertical bracing looks comprehensive.
- Omitted on birdcages, where there is no building face holding the plan shape.
- Fitted at one level only on a structure that needed it at several.