A Summary of Design Formulas for Beams Having Thin Webs in Diagonal Tension
This is a 1933 NACA-style technical report, issued by the National Advisory Committee for Aeronautics for aircraft structural engineers, summarising design formulas for thin-webbed beams under diagonal tension. The pictures are typed-era line diagrams in black ink: hatched beam elevations with shear forces marked by arrows, a tapered girder with vertical stiffeners and labelled dimensions, and a cantilever beam with a point load at its free end. A designer could take the crisp hatching patterns and the dense, cleanly drafted engineering linework as a restrained model for technical diagrams.
