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Steel frame
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<p>Steel frame is a building technique with a "<a href="/facts/Skeleton/FXc9Y2lF">skeleton</a> frame" of vertical <a href="/facts/Steel/aN6qWo4H">steel</a> <a href="/facts/Columns/NDtghP75">columns</a> and horizontal <a href="/facts/I-beam/g5HSloVP">I-beams</a>, constructed in a rectangular grid to support the floors, roof and walls of a building which are all attached to the frame. The development of this technique made the construction of the <a href="/facts/Skyscraper/5nM0naVB">skyscraper</a> possible. Steel frame has displaced its predecessor, the <a href="/facts/Iron_frame/dzN5nmh4">iron frame</a>, in the early 20th century. </p>