Patent ID: 6041564
Filing Date: 2000-03-28
Classification: B21D,E04B,Y10T

Abstract:
A grid tee for a suspended ceiling comprising sheet metal folded to form a longitudinally extending double web with a cross section having two integral and vertically extending web elements each formed by a layer of the sheet metal and a pair of diverging flanges each integral with an associated one of the web elements, the web elements being locked together in abutting contact by a plurality of clinched openings integrally formed therein, the openings being longitudinally spaced from one another along the length of the grid tee, such that they exist at locations adjacent the mid-length of the tee at least one of the web elements having edge portions wrapped in opposite longitudinal directions around the other web element at the clinched openings to clinch the web elements together, the wrapped edge portions lying in both longitudinal directions having a projection on a vertical plane greater than the wall thickness of the web elements whereby the torque strength of the tee is increased.