Perception of professionals on causes of structural cracks in concrete buildings

Abstract

Of recent, the incessant collapse of buildings in some major cities in Nigeria has become a major concern to professionals in the construction industry and the general public because it has resulted in most cases loss of lives and valuables which could affect our attaining the sustainable development goals (SDGs). One of the key features that affect the quality of built structures and usage is crack. The occurrence of a crack in a structural member can weaken the member and eventually lead to building failure and outright collapse. This paper examines the perception of professionals in the Nigeria building industry on the causes and impact of crack on built structures. Primary data were obtained through questionnaires administered to practising professionals within Lagos state. Results obtained from the majority of the professionals indicate that occurrence of a crack in the building is majorly caused by foundation settlement, poor selection of construction materials and technique, design error and corrosion of the steel bar and thus have a significant impact on the structural integrity of the building. It was concluded by proposing certain preventive measures to mitigate crack in buildings so as to prevent possible building failure and attainment of the SDGs.