SteelFrame - Steel Frame Construction 2008 Page 1...

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Steel Frame Construction 2008 Page 1 Steel-Frame Construction Steel has been used for more than 150 years in shaping the built environment. Although the idea of steel conjures up images of a heavy or cumbersome material, the steel used in residential construction is quite the opposite. Cold-formed steel (CFS) is lightweight, easy to handle, cost effective, and a high quality alternative to traditional residential framing materials. CFS offers the builder a strong, dimensionally stable, easy-to-work framing system whose use can be traced back to 1850. In the late 1920s and early 1930s cold-formed steel entered the building construction arena with products manufactured by a handful of fabricators. Although these products were successful in performance, they faced difficulties with acceptance for two reasons: (1) there was no standard design methodology available, and (2) cold-formed steel was not included in the building codes at that time. Many of the CFS applications were unable to be used due to the lack of design methodology and product recognition. Growth in Popularity Between 1979 and 1992 the number of steel-framed homes saw a substantial increase. Cold-formed steel framing was used in 5% of housing starts in the U.S. in 1993. This percentage increased to 8% in 2000 and had reached 12% in 2005. The emphasis has been on single-family homes in the Sunbelt and on multi-family homes in the north. The popularity of steel framing in the Sunbelt is expected to continue to increase rapidly because of the concern over termites, decay, and high winds. Urban areas and fire hazard districts are also expected to show a growing interest in steel framing. According to the Washington DC-based Steel Framing Alliance there is no national system ( ) in place to track the use of steel framing in homes accurately. However, the Alliance estimates that steel was being used in 3 to 6 percent of the housing starts in the US in 1999.
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Steel Frame Construction 2008 Page 2 In Florida, however, every building built must have an Energy Code Compliance Form prepared and submitted when applying for a permit. Included in this form is a description of the exterior wall configuration including the type of building system. Presented below is a summary of the mix of building systems used in Florida in 2000 and 2001. Based on a random sample of over 1,600 single-family detached homes, less than 1% of the homes built in the Central climatic zone employed steel framing. (See table below) Face brick Concrete Lt Wt Conc Climatic zone Wood frame Conc block Int insul Ext insul Int insul Ext insul Poly bead aggregate Wood frame Steel frame Log Other South (350 units) 0.5% 0.5% 62.0% 1.7% 3.4% 1.1% - 39.7% - 0.2% - Central (932 units) - - 42.8% 1.7% 1.6% 0.1% 0.5% 53.2% 0.2% - - North (330 units) 14.8% 0.6% 9.1% 0.3% 0.6% - 0.9% 79.4% - - - Environmentally Friendly The Steel Framing Alliance claims that cold-formed steel framing is an environmentally friendly building system because:
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This note was uploaded on 08/27/2011 for the course BCN 4023 taught by Professor Stroh during the Spring '11 term at University of Florida.

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SteelFrame - Steel Frame Construction 2008 Page 1...

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