Perhitungan Kebutuhan dan Waste Tulangan Kolom dan Balok Menggunakan Metode BBS pada Gedung PTTUN Medan

Abstract

Efficient reinforcement steel management plays a significant role in controlling construction costs in building projects. Inaccurate estimation of reinforcement requirements may lead to excessive material waste and reduced project efficiency. This study aims to determine the reinforcement requirements and evaluate the percentage of reinforcement waste in column and beam elements using the Bar Bending Schedule (BBS) method in the State Administrative High Court (PTTUN) Building Project, Medan. The research employed a quantitative descriptive approach using secondary data obtained from shop drawings. Reinforcement calculations were performed in accordance with SNI 2847:2019 and SNI 2052:2024, while waste evaluation referred to SNI 7394:2008. The Bar Bending Schedule was developed using Microsoft Excel to determine cutting lengths, reinforcement quantities, and material waste accurately by considering development length, lap splice, and bend deduction. The results indicate that the waste percentage varies according to reinforcement diameter, with the lowest value recorded for D19 reinforcement (4.89%), followed by D10 (6.97%) and D22 (8.57%). Overall, the waste percentage remained within the acceptable range of 5-20% specified in SNI 7394:2008. These findings demonstrate that the Bar Bending Schedule method is effective in improving reinforcement estimation accuracy and minimizing material waste in building construction projects.