Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 135
Fig 65. … Data required: 1. Length of span of beam, center to center. 2. Size and weight per foot of beam. 3. The amount and cl^aracter of load on tlie beam. 106
Architecture · Building · Carpentry
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