1. Structural Engineer, WSP Sweden–Bridge and Hydraulic Design, Box 13033, SE-402 51 Gothenburg, Sweden; and Industrial Doctoral Student, Dept. of Structural Engineering, Civil and Environmental Engineering, Chalmers Univ. of Technology, SE-412 96 Gothenburg, Sweden (corresponding author).
2. Associate Professor, Dept. of Engineering Sciences and Mathematics, Division of Wood Technology, Luleå Univ. of Technology, SE-931 87 Skellefteå, Sweden.
3. Professor, Dept. of Structural Engineering, Civil and Environmental Engineering, Chalmers Univ. of Technology, SE-412 96 Gothenburg, Sweden.