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Company Boeing <br />11RISA <br />Designer :Daniel Jaffe <br />Job Number : <br />Model Name : 40-26 4th Floor Cantilever Rack <br />G = 11520 ksi <br />J = 0.064 in <br />Cu, = 49.661 in' <br />Ky1 <br />K,=1 <br />L,, y = 12 ft <br />Lt=12ft <br />Q=1 <br />ro = 3.93 in <br />�r2E <br />any = = 37.449 ksi <br />(KyL y/ry)a <br />z <br />at 1 GJ+ � ECG" 16.966 ksi <br />Ar0 (KtLt)z <br />Chr�A � S a,yat = 38.897 ksi <br />f <br />12/17/2024 <br />3:45:50 PM <br />Checked By: Clemens Ro... <br />Shear modulus of elasticity <br />Torsional constant <br />Warping constant <br />Effective length factor for the flexural <br />buckling about the y-axis <br />Effective length factor for twisting <br />Distance between points which brace the <br />member against flexural buckling about the <br />y-axis <br />Unbraced length of compression member for <br />twisting <br />Lateral -torsional buckling modification factor <br />Polar radius of gyration of cross-section <br />about shear center (Eq. E2.2-4) <br />Elastic flexural buckling stress (Eq. F2.1.1-4) <br />Torsional buckling stress (Eq. F2.1.1-5) <br />Critical elastic lateral -torsional buckling stress (Eq. F2.1.1-1) <br />For 2.78F,y > F,, > 0.56Fy, F, = 10 9 Fy Cl — 36F �� = 32.67 ksi <br />c� e <br />My = SfyFy = 48.357 k- ft <br />M1,1. = S/F,,, < M,, = 37.615 k-ft <br />Local Buckling Interacting with Yielding and Global Buckling <br />F.,� = 42 ksi <br />F,,, = 32.67 ksi <br />Snt = 13.812 in3 <br />R=1 <br />Sn = 13.811 in <br />M,,,l = SF,,, < S tF7,R = 37.599 k-ft <br />M,, = min(M,,n, M7,,) = 37.599 k,- ft, <br />Obz = 0.9 <br />Global flexural stress (Eq. F2.1-4) <br />Member yield moment (Eq. F2.1-2) <br />Flexural resistance for yielding and global (Eq. F2.1-1) <br />(lateral -torsional) buckling <br />Specified minimum yield stress <br />Global flexural stress <br />(Sec. F2) <br />Effective section modulus calculated at <br />(Program <br />extreme fiber tension stress of Fy <br />Calculated) <br />Reduction factor <br />(Eq. 1­14-1) <br />Effective section modulus <br />(Program <br />Calculated) <br />Flexural resistance for local buckling <br />(Eq. F3.1-1 &Eq. <br />1­14-1) <br />Flexural resistance <br />Resistance factor in flexure <br />RISA-3D Version 19 [ 40-26 cantilever rack copy.r3d ] Page 9 <br />