Category: How to
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Elastic vs. Plastic Section Modulus in Steel Shape Tables: Understanding S, Z, and Shape Factor
Learn how elastic section modulus S and plastic section modulus Z differ, how each is calculated, and how to read them correctly in structural steel shape tables.
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Web Thickness and Flange Thickness in Structural Steel Shapes: Reading tw and tf Correctly
Learn how to interpret tw and tf in steel shape tables, CAD profiles, connection details, and fit-up checks for W-shapes, channels, tees, and related sections.
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Gross Area, Net Area, and Effective Net Area in Steel Tension Members
Learn how gross area, net area, and effective net area differ in steel tension members, including bolt holes, staggered paths, shear lag, and CAD checks.
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Steel Angle Heel, Toe, and Root Radius: Geometry, Datums, and CAD Detailing
Learn steel angle heel, toe, root-radius, back-of-leg, and centroid terminology for clearer drawings, connection layouts, and CAD shape models.
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Units of Structural Steel Section Properties: A, I, S, Z, r, J, and Cw
Learn the units for steel section properties, how length powers control conversion, and how to check A, I, S, Z, r, J, Cw, and Q.
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Strong-Axis vs. Weak-Axis Bending in Structural Steel Shapes: Reading Ix, Iy, Sx, and Sy
Learn how strong- and weak-axis bending relate to steel shape orientation, Ix, Iy, Sx, Sy, bracing, CAD models, and structural drawings.
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Dimensioning Curved Steel Plate Profiles: Radii, Arc Centers, Chords, and Tangent Points
Learn how to define curved steel plate profiles with radii, centers, chords, tangent points, coordinates, and CNC-ready drawing checks.
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W-Shape k Dimensions: kdes, kdet, Fillet Zones, and Connection Clearance
Learn how W-shape kdes and kdet dimensions define flange-web fillet zones and affect plate fit, weld access, bolt layout, and CAD detailing.
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Shear Area in Structural Steel Sections: Av, Web Area, and Analysis-Model Checks
Learn how effective shear area differs from gross area and web area, how local axes affect Av, and what to verify in steel analysis models.
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Principal Axes of Structural Steel Sections: Rotation, Ixy, and CAD Orientation
Learn how principal axes relate to centroidal axes, product of inertia, unsymmetric bending, steel shape tables, and CAD section orientation.
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Bolted Steel Beam Splices: Web Plates, Flange Plates, Datums, and Detailing Coordination
A practical guide to bolted steel beam splices, including web and flange plates, member datums, bolt layouts, fit-up, and drawing coordination.
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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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