Strain measurements on small duralumin box beams in bending
This is a 1937 NASA technical report, from the NASA Technical Reports Server collection, presenting strain measurements on small duralumin box beams under bending. Its two pictures are engineering graphs and drawings: a plotted curve of effective width against sheet width, and a mechanical elevation of a box beam with rivet and bulkhead details. A designer might borrow the plain grid-plotted graph style and the dimensioned line drawing conventions for technical diagrams.
