Must my header design conform to the design rules contained in the Standard for Cold-Formed Steel Framing – Header Design?
Yes. The Standard for Cold-Formed Steel Framing – Header Design has been adopted by reference in the 2003 ICC and NFPA building codes and thus is legally required when the local building code adopts the these building codes. Headers that fall outside the applicability limits of the limitations of the Header Design standard must be designed in accordance with the AISI North American Specification for the Design of Steel Structural Members. Question: When using steel framing in fire rated wall systems, is the thickness of the steel the minimum, or the maximum? I understand that steel transmits heat, so I thought that the thickness shown might be the maximum. Answer: The thickness shown in the UL listings is the minimum. See the info from the UL website below on cold-formed steel framing. Question: In the UL listings for fire ratings, the thickness is given in gauge. I know that some of the tests were done many years ago, and thicknesses and tolerances may have changed. Are the thicknesse
Related Questions
- Why doesn the Standard for Cold-Formed Steel Framing - Prescriptive Method for One and Two Family Dwellings seem to require a check for wind uplift on back-to-back or box headers?
- How do I decide whether G-60 or G-90 galvanized finish is appropriate when using cold-formed steel framing in a commercial application?
- Which specification or code governs the design of cold-formed steel structures in different regions or countries?
