Mohammed Ali M. Rihan
1) Pan African University Institute for Basic Sciences, Technology, and Innovation, hosted at the Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya. 2) Civil Engineering Department, Faculty of Engineering, University of Kordofan, El Obeid 51111,
Sudan

Richard O. Onchiri
Department of Building and Civil Engineering, Technical University of Mombasa (TUM), Mombasa,
Kenya

Naftary Gathimba
Department of Civil, Construction and Environmental Engineering, Jomo Kenyatta University of Agriculture and Technology, Nairobi,
Kenya

Bernadette Sabuni
Department of Civil and Structural Engineering, Masinde Muliro University of Science and Technology, Kakamega,
Kenya