The Kahn system, showing the bars bent at 45° for shear reinforcement. International Library of Technology, vol 34D, Stone & Brick, &c (Scranton Pennsylvania) 1922 [1906-1912] 45, p. 15.
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![Bottom: The Kahn system, showing the bars bent at 45 degrees for shear reinforcement. International Library of Technology, vol 34D, Stone & Brick, &c (Scranton Pennsylvania) 1922 [1906-1912] 45, p 15. [drawing]](latrobe-72-054b.jpg)
