COMPARISON OF DRAINAGE COVER COSTS IN THE RUNWAY STRIP AREA USING PRECAST CONCRETE AND CONVENTIONAL CONCRETE AT FRANS SALES LEGA AIRPORT, RUTENG

Abstract

This study discusses a cost and time comparison of drainage cover construction using conventional concrete and precast
concrete methods at Frans Sales Lega Airport. The research was motivated by the presence of open drainage channels
in the runway strip area, which do not comply with the 2023 regulations issued by the Directorate General of Civil
Aviation. The drainage cover was designed with dimensions of 2300 mm x 600 mm for both conventional and precast
concrete. The research method used is descriptive with a quantitative approach to cost and construction time analysis,
starting with data collection such as drainage layout and local unit price standards (HSPK). The process continued with
moment, shear, and deflection analysis, which was then used to calculate the loading. The next steps involved designing
the slab thickness and comparing both cost and duration of execution. The analysis results show that the conventional
concrete method requires a total cost of IDR 3,920,834,511.00, while the precast concrete method amounts to IDR
8,786,393,521.00. In terms of duration, precast concrete is more efficient with 42 days of work compared to 83 days for
conventional concrete. Based on these findings, conventional concrete is more economical in terms of cost, while precast
concrete is superior in time efficiency.