For the first time in this edition, Frei Otto's two studies of nonrigid structures "(Pneumatic Structures" and "Cables, Nets, and Membranes)" are available in one volume. "Pneumatic Structures" deals for the most part with surfaces loaded by tractive forces. Special membranes, of high tensile strength, are made semi-rigid by means of differences of enclosed air or fluid pressure and can serve as roofings, halls, silos, dams, or for any other application where ease and rapidity of construction and transportation are essential. This section is illustrated with 1,660 numbered photographs and line drawings, including many striking photographs of both models and existing implements and structures. In "Cables, Nets, and Membranes" the subject of nonrigid architectural structures is continued with a detailed investigation of structures under tensile loads, of which suspension bridges and tents are the most commonly known examples. Like pneumatic structures, tensile structures have the advantages of mobility, light weight, ease and speed of erection, and low cost.
I own and read the 1969 first edition hardcover of "Tensile ..." published by the MIT Press with 400 plus pages. Great reference book on structural engineering of temporary lightweight shelters like tents, big top, canvas canopy, membranes, tensions in ropes & cables...
I saw and visited on several occasion one of Otto's most magnificent tent building, West Germany Pavilion at Expo 67 in Montreal, before it was dismantled in 1977 or 1978. That large fabric soaring structure, who withstood 10 Canadian winters, was so awe inspiring it should have been preserved ... But Frei Otto (1925-2015) was the pioneering architect / engineer who advocated for a non permanent architecture...