I have a L80607 truss member that fails by a ratio of 1.36 under a compression force of 33.0 kips, using the AISC 360-10 ASD code. The KL/R ratio listed in the output is 148.9, which for A36 steel should result in a capacity of about 40 kips. The critical formula is listed as Eq. H2-1. Any ideas about what may be causing the discrepancy?
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