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OCR: Development of the Bell Footing Overview Why? History of footings Success of these types of foundations led to larger designs Development of ithe structures in the central and Bell Footing which were used on many Pre-molded bell southern part of the country With the stability of foundations footings now established through the use Of piers even in poor soil Review load bearing capacity areas and mechanized construction methods taller and larger buildings could now be built with References some assurance that they would remain stable Piers with TEST shaft diameters of 10 feet and more are not uncommon under mary buildinas Bells are usually three times the shaft diameter, which would mean bells of 30 feet are used. The size of the shaft IS determined by the load bearing capacity of the soil ...