Patent ID: 7887249
Filing Date: 2011-02-15
Classification: B64C,E04B,E04C,F16B,Y02T,Y10T

Abstract:
1. A structural element, comprising: a groove formed in a unitary sheet of foldable material, the groove substantially defining a fold line along which the unitary sheet of material is foldable, the unitary sheet having first and second sections separated by the groove; and a row of tabs extending along one of two sidewalls of the groove and a row of recesses extending along the other sidewall of the groove, the tabs being positioned on a side of the groove opposite the recesses; the tabs and recesses being oriented such that the tabs are receivable within the recesses positioned on an opposite side of the groove when the material is folded along the fold line, the tabs and recesses forming an internal finger joint when the material is folded along the fold line.