STUDI EFISIENSI PEMBANGUNAN GEDUNG RSUD BERBASIS KAJIAN STRUKTUR PELAT LANTAI

Abstract

The construction of multi-story hospital buildings demands cost and time efficiency without compromising structural safety and reliability, particularly for floor slab elements that lie on the critical path of project execution, where conventional cast-in-situ methods often face challenges from extensive formwork, temporary scaffolding requiring substantial material volumes, weather dependency, and intensive labor coordination that can delay overall building progress. This study aims to evaluate the cost efficiency, construction time, labor requirements, installation ease, and structural performance of floor slabs through a comparison of cast-in-situ and precast half slab methods on a new hospital building project using a systematic Value Engineering Job Plan approach, encompassing information gathering, function analysis, creative ideation, evaluation, development, and solution presentation phases. The research employs a quantitative-qualitative case study method based on Bill of Quantities (BoQ), Unit Price Analysis (AHSP) from PUPR 2025, five-month field observations during internship, documentation of precast panel installation processes, critical activity duration calculations, and analysis of composite bond mechanisms to ensure effective load transfer from panels to supporting elements. Results indicate that the precast half slab method reduces execution costs by 39.8% or Rp 403.9 million per floor through the elimination of permanent formwork, 20-30% reduction in reinforcement volume, concrete material optimization, and enhanced labor productivity, while accelerating work duration by 40% to 15 days compared to 25 days for conventional methods, thanks to controlled factory production independent of site conditions. Structurally, floor slab performance remains fully compliant via the composite system between 5-7 cm thick precast panels (K-300 with bottom reinforcement) and 5 cm concrete topping (K-250), forming monolithic behavior that meets flexural strength, horizontal diaphragm stiffness for seismic-wind load distribution per SNI 1726:2019, and flexible MEP integration without complex formwork dismantling. The study concludes that the precast half slab method is more efficient and viable for vital facility buildings like hospitals, offering practical implications such as stringent oversight of panel production, inter-panel joints, topping concrete quality, lifting equipment coordination, and design adaptations for high-rise structures in Indonesia to optimize project progress without sacrificing flexural capacity, diaphragm stiffness, ductility, redundancy, and overall material quality