Nontraditional framing

Box construction with plywood enables winders to be constructed without relying on traditional wreathed strings, the general arrangement is given in Figure 6.6a. The plywood is fixed to the envel-

Figure 6.5a Curved framing: Curved flight, Roche Chemicals, Welwyn Garden City, 1938, Architect: Otto Salvisberg (from Schuster, F., Treppen, Homan Verlag, 1949)
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