This report details a three phase project focusing on aircraft tie- downs, which describe mechanisms designed to secure aircraft to the pavement surface. The objective of this project was to determine the pull-out capacity of existing tie-downs and to develop alternative lightweight and heavyweight aircraft tie-downs. The Air Force Civil Engineering Support Agency (AFCESA) categorizes lightweight tie-downs as tie-downs with a vertical pull-out resistance of 17,000 pounds and heavyweight tie-downs as tie-downs with a vertical pull-out resistance of 37,700 pounds. Phase 1 entailed determining the pull-out capacity of existing shepherd's hook tie-downs in rigid and flexible pavements. Phase 2 and 3 testing focused lightweight and one heavyweight tie- down. Phase 3 testing resulted in the development three possible lightweight tie-downs, although additional testing is necessary before recommending this option.
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