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he The probable maximum moment at the plastic hinge is given below, according to AISC 358-16.
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Beam depth is limited to a maximum of 36 in. (920 mm) for rolled shapes. The depth of built-up sections does not exceed the depth permitted for rolled wide-flange shapes.
Beam flange thickness is limited to a maximum of 1 in. (25 mm).
The clear span-to-depth ratio of the beam is limited as follows:
For special moment frame systems, 9 or greater.
For intermediate moment frame systems, 7 or greater.
2. Column Limitations(1)
The beam is connected to the flange of the column.
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Rolled-shape column depth is limited to
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a maximum of 36 in. (920 mm) when a concrete structural slab is provided. In the absence of a concrete structural slab, the rolled-shape column depth is limited to
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a maximum of 14 in. (360 mm).
Flanged cruciform columns don’t have a width or depth greater than the depth allowed for rolled shapes. Built-up box columns don’t have a width or depth exceeding 24 in. (600 mm). Boxed wide-flange columns don’t have a width or depth exceeding 24 in. (600 mm) if participating in orthogonal moment frames.
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