Selecting the alternatives of support system for scaffoldings covering building projects using Analytic Hierarchy Process (AHP)

Abstract

In recent years, construction works often have had accidents due to inadequate scaffolding systems. Some accidents have caused enormous economic and human consequences. When constructing a multi-story building, the scaffolding system is used to ensure the safety and finishing of the work. There are two construction options for this scaffolding system: cable and no cable. Each of the above options has different advantages and disadvantages. The criteria used to select options include technique, schedule, and cost. First, this study designs the scaffolding support system for a typical case. Then, the analytic hierarchy process (AHP) method compares the selection of options according to the three criteria above. The analysis results show that the with-cable option has 66.5% of the selection potential, and the without-cable option is 33.5%. In addition, the sensitivity analysis results show that the with-cable option is always selected except for the following cases: (1) technique value below 40.5%, and (2) cost value below 3.9%.

Keywords: Scaffolding, bracket; Analytic Hierarchy Process; construction