Structural Steel Shapes
There are a wide variety of steel shapes available. The most common shapes are listed below; however, many manufacturers have special shapes.
The nomenclature for steel shapes follows two standards:
- For wide flange, bearing pile, S-shapes, channels, and tees: the letter indicates the shape, the first number indicates the nominal height, and the second number indicates the weight per 1 foot of length. For instance, the W12x36 listed in the table below is a wide flange shape that has a nominal height of 12" and weighs 36 pounds per foot of length.
- For steel tubes, pipes, plates, and angles: the 3 numbers indicate the height, width, and thickness of the steel.
|Flange surfaces are parallel; flange thickness is not necessarily equal to the web thickness.|
|Bearing Pile||HP14x73||Flange surfaces are parallel; flange and web have equal thicknesses.|
|American Standard Beam||S15x50||The inner flange surface is sloped.|
|Channel ||C12x30 ||Standard AISC flanges have sloped inner flange surfaces. |
WT shapes are cut from a wide flange.
ST shapes are cut from American Standard Beams.
MT shapes are cut from non-standard I-shapes.
Hollow Steel Section
|Either nomenclature is acceptable; however, HSS is more common.|
|Angles come in equal leg or unequal leg sizes. The diagram at left shows an unequal leg. |
|Pipe ||Pipe 4 STD |
|Plate ||PL 0.5x12"x30" ||Very small plates can also be called bars. |
2004 CSI Masterspec Division
Structural Metal Framing: 05 10 00
Metal Fabrications: 05 50 00