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Reference.org
Deep Foundations Institute
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<p>Deep Foundations Institute (DFI) is an international association of contractors, engineers, manufacturers, suppliers, academics and owners in the deep foundations industry. </p><p>DFI was incorporated as a 501(c)6 association in January 1976. It was founded by Jack Dougherty and Hal Hunt during the “Pile Talk” seminars and became a multidisciplinary worldwide membership organization. </p>