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 E
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Modulus of elasticity, psi
F
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Maximum bending stress in member, ksi
Fa
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Axial compressive stress permitted in absence of bending
moment, ksi
Fdv
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Dynamic yield stress in shear, ksi
Fdy
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Dynamic yield stress in flexure, ksi
Fex, Fey-
Euler stress divided by safety factor, ksi
Fs
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Allowable static design stress, ksi
Fy
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Static yield stress, ksi
g
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Acceleration due to gravity, ft/sec2
h
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Clear distance between flanges of sections
H
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Story height, ft
I
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Moment of inertia, in4
Ica
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Average column moment of inertia, in4
Ig
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Moment of inertia of girder, in4
K
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Effective length factor
Frame Stiffness, k/in
Kb
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Horizontal stiffness of tension bracing
KE
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Equivalent elastic unit stiffness, k/ft or lb/ft
KL
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Load factor
KLM
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Load-Mass factor
KM
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Mass factor
*l
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Distance between cross sections braced against twist or
lateral displacement of the compression flange, in
*lb
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Actual unbraced length in pland of bending, in
*lcr
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Critical unbraced length adjacent to plastic hinges, in
*lx, *ly - Unbraced lengths in x- and y-axes respectively
2.08-194
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