Metal Stud Framing Standards

Description

• Metal stud framing uses cold-formed steel members instead of traditional wood. The metal studs are created by folding, shaping and rolling sheet metal into shapes and sizes similar to lumber framing, including studs in dimensions of two-by-four-, two-by-six-, two-by-eight- and two-by-10-inch sizes. Metal stud framing is strong, making it an ideal construction choice in geographical areas that experience high wind speeds, earthquakes and other earth disturbances.

Characteristics

• Metal stud framing systems have standard properties that make them an excellent choice for many building purposes. Termite resistance and noncombustibility are two important characteristics of metal studs that may interest homeowners. The dimensional stability of metal studs lowers the cost of construction — unlike wood framing, there is no need to add further materials to support or constrain a metal stud. Some manufacturers may offer metal studs with recycled content.

Standard Specifications

• There are five standard items used in specifying metal stud framing. The first item is the stud, which includes joists, rafters and wall studs. The second is the track, which is placed at the bottom and the top of the studs or along the rim where joists and rafters rest. The third item is the U-channel, which is used to bridge, block and customize metal wall framing to add cabinets. The fourth item is a furring channel, which also allows for bridging but can also be used for cabinet and structural backing and sound separation. The fifth standard item found in metal stud framing is the L-header used above window and door openings. Metal studs are typically placed at 24 inches on center instead of the traditional 16 inches on center used in wood framing.

Building with Metal Studs

• Typically, one- and two-story structures can be assembled by builders without the aid of a structural engineer when the prescriptive method is used. The prescriptive method is a metal stud framing standard that assembles span and load tables, fastener standards and other requirements for the builder to reference during construction. Verification of local building code requirements for metal stud framing should be conducted by contacting the local city or county building department. Structures that require more than a simple design of walls and a roof usually require design assistance from a state-licensed structural engineer according to the requirements of local building codes. The American Iron and Steel Institute writes and manages the standards for the prescriptive method, which is referenced in many U.S. building codes.