The application of high-grade steel to the road barrier design for the construction project cost efficiency

Abstract

Steel is a construction material that has been used in the construction field for a long time, so we need to consider more about the quality and the grading. Meanwhile, the cost of steel is so high that it will also impact the implementation. On this occasion, Hutama Karya Group in the collaboration with PT Bhirawa Steel has done research and innovation to the High-Grade Steel Structure, especially for type 520 MPa reinforcing steel which includes the development of Tensile strength, Yield Strength, Elongation from the strength of the materials. High-Grade Steel will be a solution to the cost efficiency of construction. Nowadays, the usages are only permitted for the non-structural part based on the written requirement from National Standard in Indonesia (SNI 2847: 2019), even though the test requirements for structural needs are already fulfilled. The purpose of this study was to apply it to the road barrier design along one of the sections of the Trans-Sumatera Toll Road which has a total length of a section of 58 kilometres. The usage of High-Grade Steel has proven to reduce the total weight needs of the reinforcing bar which may cut the cost by around 26 percent for the Road Barrier design. This study may be one of the proofs of the cost-efficient use of High-Grade Steel materials. Therefore, in further study, the testing reference which has been included in the structural use of the high-grade steel can be the supporting reference to be included in the SNI.