Tag: structural steel
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Radius of Gyration in Steel Shape Tables: Understanding rx, ry, and KL/r
Learn what radius of gyration means in steel shape tables, how rx and ry relate to area and moment of inertia, and how to avoid common KL/r and CAD axis errors.
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Area Moment of Inertia vs. Mass Moment of Inertia in Structural Steel
Learn how area and mass moments of inertia differ, how to recognize their units, and which property belongs in steel design, CAD, and dynamic calculations.
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Plastic Neutral Axis vs. Centroid in Structural Steel Sections
Learn why a steel section’s plastic neutral axis may not pass through its centroid, how it relates to plastic section modulus Z, and how to calculate it.
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Torsional Constant J and Warping Constant Cw in Steel Shape Tables
Learn what J and Cw mean in structural steel shape tables, how open and closed sections resist torsion, and how to use these properties in design and CAD workflows.
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