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University of California Berkeley CEE 122: Design of Steel Structures Department of Civil and Environmental Engineering Fall 2008 Midterm 1: Tension and Compression Members 10/14/08, 502 Davis Hall, 2 hours Name Problem Points Maximum 1 25 2 25 3 25 4 25 total 100 Honor Pledge: I have neither give nor received aid during this examination, nor have I concealed any violation of the Honor Code.

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Problem 1: (25%) Determine the governing eﬀective area ( A e = UA n ) for the C12x30 channel shown (not the gusset plate). Standard holes are made for 1-inch diameter bolts by punching. Compute the appropriate shear lag factor and include it in your calculation. Do not consider block shear. 3" 3" 3" 3" C12x30 d b =1" 1" gusset plate 2" 2" 2" 2" 2" Problem 2: (25%) A W24x76 A992 tension member is connected at it two ends to gusset plates as shown. Standard holes are made for 7/8-inch diameter bolts by punching. Compute the design strength φR n of this member taking into account yielding, ultimate tension, and block shear limit states at
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