초록 ▼

A method is disclosed for controlling the axial collapse of an open cross-sectioned beam. Trusses are attached to the beam in a form to angulate between the flanges of the beam and act as stress stabilizers or load resistors. Depressions are formed in the flanges of the beam located intermediate sai

A method is disclosed for controlling the axial collapse of an open cross-sectioned beam. Trusses are attached to the beam in a form to angulate between the flanges of the beam and act as stress stabilizers or load resistors. Depressions are formed in the flanges of the beam located intermediate said trusses. The trusses and depressions each have an axial dimension which is about 1/6-½the spacing between trusses. Upon sufficient loading, the beam collapses with the flanges folding substantially only at said depressions.

대표청구항 ▼

A method of controlling the axial collapse of an open cross-sectioned beam having flanges constituting angulated walls of the beam, comprising: (a) attaching trusses at spaced intervals along said beam, said trusses extending laterally between angulated walls of (b) forming depressions in said flang

A method of controlling the axial collapse of an open cross-sectioned beam having flanges constituting angulated walls of the beam, comprising: (a) attaching trusses at spaced intervals along said beam, said trusses extending laterally between angulated walls of (b) forming depressions in said flanges located at least intermediate said trusses, said trusses and depressions each having an axial dimension which is about 1/6-½the spacing between said trusses; and (c) subjecting said beam to axial loading effective to collapse said flanges between said trusses, said flanges folding substantially only at said depressions.