Patent ID: 8474213

Claim:
A frame member for a structure, comprising: a generally flat, elongated first surface having an elongated slot therein extending along an axis, the slot being defined by: first and second generally flat, converging sidewalls, the first and second converging sidewalls lying in corresponding planes which are at acute angles to the surface and having terminal ends; first and second diverging outer abutment walls which extend from the terminal ends of the first and second converging sidewalls and have terminal ends, the first and second diverging outer abutment walls being non-parallel to the first surface; first and second diverging inner abutment walls extending from the terminal ends of the first and second outer diverging sidewalls toward the surface, the first and second diverging inner abutment walls having terminal ends; and a generally concave terminal wall interconnecting the terminal ends of the first and second diverging inner abutment walls.