Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 136
Fig. 65. &=! Fig. 04 … Fia 66 Data required: 1. Length of span of beam, center to center. 2. Size and weight per foot of beam. 3. The amount and character of load on the beam. 106
Architecture · Building
Internet Archive · Kelly Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
