Seismic Wall Angles

It may seem unnecessary in Australia, but seismic events occur more often than many people realise, and this risk should influence building design.

To improve perimeter stability during an earthquake, National Ceiling Systems developed a series of seismic wall angles specifically suited to seismic conditions.

Both our shadowline and plain wall angles include a slot that accepts the SRIC roll‑in perimeter clip, allowing for both fixed and floating perimeter configurations. You can find full details on these options in our Seismic Design Guide, available at the link.

Seismic wall angles also perform well when a ceiling requires back‑bracing to the substructure. We generally recommend this for larger ceiling areas that need greater structural strength. The bracing zone must be at least nine metres wide and nine metres long (reduced to six by six metres in New Zealand due to higher seismic risk).

Alongside our product range, NCS provides complete seismic design services at the design stage of your project. If you’re a designer working on a seismically stable ceiling, this service streamlines the design process and helps ensure a practical, effective solution from the start. You can request a full seismic design using this form. Please remember that all seismic designs must be reviewed by a qualified independent engineer before construction begins.

For detailed information, drawings, and seismic requirements, download our Seismic Design Guide.

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