Curved building panel with stress-reducing apertures

A building panel having a longitudinally extending direction comprising upstanding opposing longitudinally-extending lateral side flanges having a plurality of stress-reduction apertures therein, and a central portion, the central portion intersecting with the lateral side flange along lines of intersection, each line of intersection being curved in the longtidunally-extending direction;

• and wherein the apertures have a shape selected from the group consisting of Y-shaped, X-shaped, W-shaped, M-shaped, diamond-shaped, and half-moon cresent-shaped.

A building panel having a longitudinally extending direction comprising upstanding opposing longitudinally-extending lateral side flanges having a plurality of stress reduction apertures therein, and a central portion, the central portion intersecting with the lateral side flanges along lines of intersection, each line of intersection being curved in the longitudinally-extending direction, and wherein said apertures are in plurality of substantially parallel vertical columns spaced apart along the length of each flange and have a shape selected from the group consisting of V-shaped, Y-shaped, X-shaped, U-shaped, W-shaped, M-shaped, triangular-shaped, diamond-shaped and half-moon cresent-shaped.

A building panel having a longitudinally extending direction comprising upstanding opposing longitudinally-extending lateral side flanges having a plurality of stress-reduction apertures therein, and a central portion, the central portion intersecting with the lateral side flanges along lines of intersecting, each line of intersecting being curved in the longitudinally-extending direction;

• and wherein the apertures have a shaped selected from the group consisting of V-shaped, Y-shaped, X-shaped, U-shaped, W-shaped, M-shaped, triangular-shaped, diamond-shaped, and half-moon cresent-shaped and wherein the apertures are in a plurality of substantially parallel, vertical columns, spaced apart along the length of each flange, and further, wherein each side flange has a top edge, and wherein each of said plurality of columns includes a top-most one of said apertures adjacent a respective one of said top edges such that said top-most aperture of each column is open at its top.

A building panel having a longitudinally extending direction comprising upstanding opposing longitudinally-extending lateral side flanges having a plurality of stress-reduction apertures therein, and a central portion, the central portion intersecting with the lateral side flanges along lines of intersection, each line of intersection being curved in the longitudinally-extending direction, and wherein said apertures are in a plurality of substantially parallel vertical columns spaced apart along the length of each flange and further wherein each side flange has a top edge, and wherein each of said plurality of columns includes a top-most one of said apertures adjacent a respective one of said top edges such that said top-most aperture of each column is open at its top.

A building panel having a longitudinally-extending direction comprising upstanding opposing longitudinally-extending lateral side flanges having a plurality of stress-reduction apertures therein at least some of which are closed, and a central portion, the central portion intersecting with the lateral side flanges along lines of intersection, each line of intersection being curved in the longitudinally-extending direction, and wherein the apertures are in a plurality of substantially parallel, vertical column, spaced apart along the length of each flange, and further wherein each side flange has a top edge, and wherein each of said plurality of columns includes a top-most one of said apertures adjacent a respective one of said top edges such that said top-most aperture of each column is open at its top.