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(Solved): Given an ASTM A992 W18x50 flexural member bending in its strong axis and is braced at the ends and t ...
Given an ASTM A992 W18x50 flexural member bending in its strong axis and is braced at the ends and third points, answer the following questions using LRFD:
NOTE: You can refer to AISC Steel Construction Manual 13th edition for section properties
7. What is the limiting lateral unbraced length for yielding (Lp)? (2 decimals in feet)
8. What is the nominal available flexural inelastic LTB strength? (whole number in kip-feet)
9. For the value of Cb required to calculate the LTB strength, what is the value of MA (expressed as a percentage of the maximum midspan moment) for the center segment of the beam? (3 decimals)
10. What is the limiting lateral unbraced length for inelastic LTB (Lr)? (whole number in feet)
WD = 0.45 kip/ft WL = 0.75 kip/ft * 35 ft
Expert Answer
7) Per table 3-2 of AISC 360, Lp for W18x50 is 5.83 ft 8) For the given beam, unbraced length is 35/3=11.67 ft For the given beam, per table 3-10 of AISC 360-10, design