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Building structures formed from repeating alternating mirror-image forms of basic mathematically determinate structural modules. The structure is applicable to the construction of buildings without internal supporting pillars or other structural supports which form interior obstructions. Such struct

Building structures formed from repeating alternating mirror-image forms of basic mathematically determinate structural modules. The structure is applicable to the construction of buildings without internal supporting pillars or other structural supports which form interior obstructions. Such structures are especially adapted for such uses as auditoriums, concert halls, exhibition halls, field houses, storage buildings, stadium covers, etc. The structures are readily adapted for factory fabrication and partial assembly, shipment as partially assembled components and final on-site assembly. The structural modules are foldable. Structures may be assembled from modules in folded or collapsed condition at or near ground level and then erected by unfolding into structures of substantial length, width and height. The completed structures may take the form of a surface of revolution, such as a hemisphere, toroid, catenoid, etc., cylindrical surface, such as a barrel vault, free-form vault, plane, or various combinations of these forms.

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