Composite I‐Section Beams: Their Properties when Subjected to Bending Stresses, with Particular Reference to Steel‐Duralumin Beams

IT is shown in the present paper that a beam may be constructed, consisting of a steel section securely bolted to a lower section of high‐tensile aluminium alloy, having a weight much lower than that of a plain steel beam of equal strength. This is frequently desirable when the weight of a steel beam would be excessive, but the cost of a section constructed entirely of aluminium alloy is unwarranted.