1. Graduate Research Assistant, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado at Boulder, Boulder, CO 80302 (corresponding author).
2. Assistant Professor and Beavers Faculty Fellow, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado at Boulder, Boulder, CO 80302.
3. Director, Center for Innovation in Construction Safety and Health, Virginia Polytechnic Institute and State Univ.; and Professor of Industrial and Systems Engineering, Blacksburg,VA 24061.