Influence of rebar practice in the total cost of building construction projects: The case of Hawassa city, Ethiopia

Abstract

Rebar is one of the materials which is so scarce and highly expensive. The existing practices produce a large quantity of wastage; which contributes to the increment of the project cost. This study aimed to analyze the causes, extent, and remedies of steel wastages on the total costs of construction projects in Hawassa city. The study followed descriptive and analytical research designs. The cost estimated in the bill of quantity and the final cost after the provision of the steel with alterations was compared and the reasons for cost overrun were analyzed. The data were analyzed using Central value analysis, correlation and regression analysis using SPSS stat20, RebarWin7.97, ETABS2016. The percentage of the cost of steel wastage in total cost was found 1.43%. The result of the study verdict that frequent design change and bare-benders skill gap contribute much to the material wastage, thus for the cost overrun of projects.

Keywords: Bending gain, cost overrun, detailing, rebar, redesign, steel, wastage