1. Graduate Research Assistant, School of Civil and Construction Engineering and Dept. of Wood Science and Engineering, Oregon State Univ., Corvallis, OR 97331.
2. Associate Professor, School of Civil and Construction Engineering, Oregon State Univ., Corvallis, OR 97331 (corresponding author).
3. Professor, Dept. of Wood Science and Engineering, Oregon State Univ., Corvallis, OR 97331.