Patent ID: 6431641
Filing Date: 2002-08-13
Classification: B62D

Abstract:
An extruded floor member having at least partially closed cross-sectional extrusion features extending in a longitudinal direction, the floor member including a plurality of sections comprising:a tunnel section having a first cross-sectional configuration; a side sill section having a second cross-sectional configuration; and a flat section having a first portion and a second portion, the first portion and the second portion being separated by a high-strength third portion, the flat section being interposed between the tunnel section and the side sill section so that the first portion is located adjacent the tunnel section, the first portion, second portion and the third portion each respectively having third, fourth and fifth cross-sectional configurations, wherein the longitudinal rigidity of the side sill section in the longitudinal direction is higher than the tunnel section and the flat section, the lateral rigidity of the second portion of the flat section being smaller than the lateral rigidity of the side sill section, and the lateral rigidity of the first portion of the flat section being substantially equal to the lateral rigidity of the second portion of the flat section.