The Collapse Method of Design as Applied to Single-Bay Portals issue no. 11 | F.A. PartridgeAuthor: F. A. Partridge Publisher: British Construcional Steelwork Association (1960) Condition: Very Good, slight scratches on the cover, and very slight wear else a contents is bright, clean and tightly bound. Binding: Softcover Pages: 40 Dimensions: 27. 8 x 21. 5 x 0. 3 cm +++ by B. C. S. A. +++ The Collapse Method of Design as Applied to Single Bay Fixed Base Portals By F. A. Partridge and the B. C. S. A.