| 摘要 |
An I-beam ( 10 ) comprises a first D-shaped flange ( 20 ) and a second D-shaped flange ( 60 ) connected by a web ( 100 ). Each flange includes a planar segment ( 30,70 ) and a curved segment ( 40,80 ). A lip ( 50,90 ) depends from the planar segment ( 30,70 ) of each flange ( 20,60 ) and is adapted to be attached to the web ( 100 ). The curved segment ( 40,70 ) of each flange ( 20,60 ) includes an outer surface ( 42,82 ) and an outer surface ( 44,84 ). The outer surface ( 42,82 ) is serrated to grip a wall panel or other structure attached to the flange ( 20,80 ) and the inner surface includes ridges ( 46,86 ) to strengthen the flange ( 20,60 ).
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