It’s one of those pieces of information that we all seem to misplace…what really IS the difference between Aluminum Association, American Standard and Sharp Corner products?
First, let’s name that shape! The base, or depth, is often noted as the first dimension of the shape. The thickness, or web, is the thickness of the base/depth. Lastly, the legs or flanges are the uprights of the channel.
Each of the different types, Aluminum Association (AA), American Standard (AS) and Sharp Corner (often called Architectural) have a different combination of leg and interior corner types.
Aluminum Association (AA) has curved (radius) interior corners and straight legs with flat ends.
Need help remembering? We like to make a connection between letters AA in Aluminum Association, and the flat ends of the legs.
American Standard (AS), on the other hand does not have ANY flat or sharp corner in its interior or legs. The legs taper from thick to thin and have rounded ends. You can almost see the shape of an “S” between the rounded legs and the radius interior corner.
Everything about “Sharp Corner” is what it sounds like! 90 degree interior corners and straight legs with flat ends make everything angular. Sharp Corner, or Architectural also only comes in aluminum alloy 6063.