the letter H. Wide-flange shapes have the same
example, the notation 9 └┘ 13.4 indicates that the
general use as I-beams; however, wide-flange shapes
channel has a nominal depth of 9 inches and weighs
have greater strength and adaptability than I-beams.
13.4 pounds per linear foot.
Identification of a wide-flange shape is by its
nominal depth and weight per foot. For example, 24
b. Actual Size and Weight Versus Nominal
WF 76 designates a wide-flange section that is 24
Size Classification. It is important to note that the
inches deep and weighs 76 pounds per linear foot.
process for rolling structural-steel shapes permits a
wide range of actual sizes and weights within a single
(5) Channels (└┘). The channel is a
nominal size classification. Examples of actual
structural shape whose cross-section is similar to a
dimensions for the various weights of typical
squared letter C. Channels are principally used in
American Standard channels, beams, and wide-flange
locations where a single flat face without outstanding
shapes are given in tables 2-3, 2-4, and 2-5,
flanges on one side is required. The channel is not
respectively. It may be necessary to refer to tables
very efficient as a beam or column when used alone,
such as these for additional information about
but efficient built-up members may be constructed of
channels assembled together with other structural
shapes and connected by rivets or welds. Channels
are identified by their depth and weight per foot. For
Table 2-3. Detail Dimensions of Typical American Standard Channels.
Table 2-4. Detail Dimensions of Typical American Standard Beams