Special perforation · Framed

Pattern 121

A perforated border around a solid center, or a perforated field held inside a solid border. Some are punched and some are only pressed, so the group covers both an open panel with a frame line and a closed panel with the same drawing in relief.

It puts the holes where they are wanted and leaves the rest of the face solid. The frame line gives the panel a visible edge, which is why these read well as a perimeter or a transition rather than as a whole ceiling. Where framed patterns suit.

Specifying pattern 121

Name it by its number. These patterns have no names in the catalog, and the number is the only identifier that will match what we hold. Give the panel size and, where the pattern offers more than one, the hole diameter you want it run at.

Special perforation is a patterned face, not a performance specification. Where the acoustic figure is what matters, work from the uniform range, which publishes an open-area percentage for every pattern.