The Influence of the Form of a Wooden Beam on Its Stiffness and Strength I : Deflection of Beams with Special Reference to Shear Deformations (1924)
NASA Technical Reports Server (NTRS) · leaf 8
to a fine wire drawn between nails over the supports, or when greater precision was required, by observing the movement of a pointer on a dial attached to a light beam resting on nails driven in the test beam over the supports. A fine silk line attached to a nail at the center of the test beam… … Fig. 2—Torsion apparatus. t ions could only be read to 0.01 inch. The two methods were never interchanged during a series of tests on any one beam. Two of the types of beams tested showed a decided tendency to buckle during test. This was overcome by using pin-connected horizontal ties, which…
NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
