Special perforation
Radial 8 patterns
Rays and rosettes worked out from a center point.
What it is
Rays, fans and rosettes worked out from a center point, usually inside a square or diamond border. Every one of them is run at the largest round hole in the special range, so the figure holds together when it is read from floor level rather than dissolving into grey.
What it does
The design is centered on the tile, so it repeats once per panel and the ceiling reads as a grid of medallions rather than one continuous field. Each panel keeps a solid margin around the figure, which means a radial face is less open than an all-over pattern punched at the same hole size.
Where it is best used
Ceilings that are meant to be looked at: lobbies, reception areas, hotel public rooms and the head of a stair. They also work as a feature laid into a plain field, where one panel or a block of four carries the figure and the rest of the ceiling stays quiet.
Special perforation is a face pattern, not a performance specification. The special sheet publishes no open-area figure for any of these. Where the acoustic number is what has to be met, work from the uniform range, which gives an open area for every pattern in it.
Radial summary
- Patterns
- 8
- Punched
- All of them
- Mounting
- Lay In
Hole
φ3
φ is a round diameter, □ a square or slot.
Panel sizes
300×300500×500600×600
Millimeters, as the catalog states them.
Compiled from the 8 patterns in this group, so this panel and the individual pattern pages always agree.
The patterns
Every radial pattern
Each one has its own page with the panel sizes, hole options and mounting the catalog gives it. Name a pattern by its number: these have no names.
Other designs
The other 5 kinds
70 special perforation patterns in all, sorted by what the design does.
Geometric
Diamonds, crosses and quartered fields built from straight edges.
23 patterns
Framed
A perforated border around a solid center, or the reverse.
13 patterns
All-over
The pattern runs edge to edge with no reserved solid area.
12 patterns
Embossed relief
Pressed into the panel face rather than punched through. No hole diameter is given for these.
9 patterns
Pressed panel
A relief pressed into the panel and then perforated within it. The catalog prints each of these twice, once perforated and once plain.
5 patterns
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project requirements
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- 2108 N St Ste 9232, Sacramento, CA 95816
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