Flat sheet metal girders with very thin metal web. Part II : sheet metal girders with spars resistant to bending - oblique uprights - stiffness
A 1931 NASA technical report, issued as Part II of a study of flat sheet metal girders with very thin webs, covering spar-resistant girders, oblique uprights and stiffness, written for aeronautical engineers. The pictures are line diagrams of web panels, tapered girder cross-sections with shear and bending loads, and deflection and moment sketches, which show how stresses and deformations were worked out for thin-web structures.
