1. Department of Building, Obafemi Awolowo University, Ile-Ife A234, Nigeria
2. Department of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester M13 9PL, UK
3. Department of Construction Economics and Management, University of Cape Town, Rondebosch 7700, South Africa
4. Department of Building Technology, Kogi State Polytechnic, PMB 1101, Lokoja 260102, Nigeria
5. School of Engineering, Faculty of Engineering and Science, University of Greenwich, London SE10 9LS, UK