1. Assistant Professor, Civil Engineering Dept., Assiut Univ., Assiut 71515, Arab Republic of Egypt; Senior Design Engineer, OPPD-USA, 15964 S St. Omaha, NE 68135 (corresponding author).
2. Professor, Durham School of Architectural Engineering and Construction, College of Engineering, Univ. of Nebraska-Lincoln, 1110 South 67th St., Omaha, NE 68182-0571.
3. Principal, e-construct LLC, 11823 Arbor St., Suite 200, Omaha, NE 68144.