Graff, William J.2022-11-102022-11-10196813829829https://hdl.handle.net/10657/12654Many steel bridges, buildings, transmission and reception towers are constructed using built-up members. The buckling load of a built-up column is of interest to the designer because bending moments and stresses from the transverse loads are amplified when the compressive force approaches this critical load. This thesis presents an analytical study to evaluate the critical buckling load for several types of built-up prismatic members. The effect of shear deformations on the buckling strength is discussed in detail. An experimental investigation on the measurement of buckling strength of built-up members was made on small scale test columns. Test results are compared with those predicted by the theoretical analysis. The tests verify the predictions of column buckling strengths made using the theoretical basis presented in this paper.application/pdfenThis item is protected by copyright but is made available here under a claim of fair use (17 U.S.C. Section 107) for non-profit research and educational purposes. Users of this work assume the responsibility for determining copyright status prior to reusing, publishing, or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions requires express permission of the copyright holder.Thesisreformatted digital