Allowable loads for HDA Holdowns have traditionally been limited by the calculated value of their stud bolts. Preliminary testing to the new acceptance criteria for testing and evaluating holdowns (AC 155) indicates that the ultimate capacity divided by a factor of safety exceeds the previously calculated values; however, the allowable loads are limited by deflection under the new critieria. Since significantly lower deflections are obtained with comparable SDS-style holdowns we recommend the use of the HDU series of holdowns. For those conditions which necessitate a bolted holdown our existing HD product line provides the best alternative for high loads at low deflection.