1. Professor, Chair, and Director, Glass Research and Testing Laboratory, Dept. of Civil Engineering, Texas Tech Univ., Box 41023, Lubbock, TX 79409 (corresponding author). E-mail: scott.norville@ttu.edu
2. Structural Engineer, Protective Design Center, U.S. Army Corps of Engineers, 12565 West Center Rd., Omaha, NE 68144-3869. E-mail: ed.j.conrath@usace.army.mil