Comparison of Reinforcement Waste of Columns and Beams in the Ditsamapta Building North Sumatra Regional Police Using Conventional Method and COP

Kevin Ghozali; Agung Nur Wahid Btr; Rhini Wulan Dary

doi:10.31572/inotera.Vol11.Iss1.2026.ID549

Kevin Ghozali Departement of Civil Engineering Politeknik Negeri Medan
Agung Nur Wahid Btr Politeknik Negeri Medan
Rhini Wulan Dary Departement of Civil Engineering Politeknik Negeri Medan

DOI: https://doi.org/10.31572/inotera.Vol11.Iss1.2026.ID549

Keywords: Waste, Reinforcement Steel, Bar Bending Schedule, Cutting Optimization Pro Software, Column and Beam

Abstract

Material is one of the most important resources in construction projects, contributing 40–60% of the total cost. Reinforcing steel often leaves excess material due to cutting errors, so optimization is needed to minimize waste. This study aims to compare waste calculation using the conventional method and Cutting Optimization Pro (COP) software through a bar bending schedule. The results show that the conventional method produced waste of Ø8 14.102%, Ø10 9.480%, D10 8.385%, D12 10.444%, and D16 9.500%. With COP, the waste decreased to Ø8 2.888%, Ø10 1.855%, D10 8.087%, D12 6.980%, and D16 5.756%. Overall, the use of COP was able to reduce waste by about 5% compared to the conventional method.

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