1. M.S. Student, Dept. of Architectural Engineering, King Fahd Univ. of Petroleum and Minerals, Dhahran, Saudi Arabia 31261.
2. Professor, Dept. of Architectural Engineering, King Fahd Univ. of Petroleum and Minerals, Box 541, Dhahran, Saudi Arabia 31261 (corresponding author).
3. Professor, Dept. of Architectural Engineering, King Fahd Univ. of Petroleum and Minerals, Dhahran, Saudi Arabia 31261.