1. Dept. of Construction Engineering, Univ. of Dammam, P.O. Box 1985, Dammam 31451, Saudi Arabia.
2. Center for Engineering Research, Research Institute, King Fahd Univ. of Petroleum & Minerals, Dhahran 31261, Saudi Arabia (corresponding author).
3. INCO Precast Engineering, Industrial Contractors Co. Ltd., P.O. Box 437, Al-Khobar 31952, Saudi Arabia.
4. Dept. of Civil Engineering, King Fahd Univ. of Petroleum & Minerals, P.O. Box 5058, Dhahran 31261, Saudi Arabia.