Steel moment-resisting frames have been in use for more than one hundred years, dating to the earliest use of
structural steel in building construction.
Steel building construction with the frame carrying the vertical loads initiated with the
Home Insurance Building in Chicago, a 10-story structure constructed in 1884 with a height of 138 ft, often credited with being the first skyscraper. This and other tall buildings in Chicago spawned an entire generation of tall buildings, constructed with load bearing steel frames supporting concrete floors and non-load bearing, unreinforced masonry
infill walls at their perimeters. Framing in these early structures typically utilized "H" shapes built up from plates, and "L" and "Z" sections. == References ==