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Symbols
Cb : The lateral-torsional buckling modification factor defined by Equation 9.1
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Lb : Length between points that are either braced against the lateral displacement of the compression flange or braced against twist of the cross-section, in. (mm)
Lp : The limiting laterally unbraced length for the limit state of yielding, in. (mm)
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Wpx : Plastic section modulus is taken about the x-axis in.3 (mm3)
Wex : Elastic section modulus is taken about the x-axis, in.3 (mm3)
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Bending
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Member Definition
These are elements that are under the effect of a simple flexural moment around their principal axes. The For the elements that are under the effect of the simple flexural moment, the loads should be acting in the plane parallel to the principal axis passing through the shear center or the element should be supported against torsion at the load application points and supports.
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The strength calculation is made by taking into account the combined stresses created in the members under a flexural moment and axial force.
Computational details are available at Design of Steel Members for Combined Forces.
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