The Influence of the Form of a Wooden Beam on Its Stiffness and Strength I : Deflection of Beams with Special Reference to Shear Deformations
This 1924 technical report from the NASA Technical Reports Server studies how the cross-sectional form of wooden beams affects their deflection under load, with shear deformation as a special focus. Its pictures are plain engineering graphs of spruce and Douglas fir beam tests, with load-deflection curves and cross-section diagrams in black ink on white, plus a photograph of a testing workshop; a designer might borrow the clean line graphs and labelled section sketches as a model for technical charts.
