STRUCTURAL DESIGN FOR THE EXPANSION OF THE AIRPORT FACILITIES WORKSHOP USING THE LRFD METHOD AT JENDERAL AHMAD YANI INTERNATIONAL AIRPORT SEMARANG

Abstract

The expansion of the airport facilities workshop building at Jenderal Ahmad Yani International Airport Semarang has
become an essential need in line with the increasing operational activities and the capacity of supporting airport facilities. This study aims to design a safe steel structure for the workshop building using the Load and Resistance Factor
Design (LRFD) method, as the Allowable Stress Design (ASD) method is no longer valid in the latest structural planning
standards. In addition, a Cost Budget Plan is prepared to estimate the cost. The method used is engineering quantitative
descriptive, with steel structure analysis using the LRFD method. The design process includes load analysis, selection of steel profiles, evaluation of structural safety factors, and the preparation of the cost estimation material, equipment, and labor according to work volume. In designing the structure, SNI 1729:2020 on Specifications for Structural Steel Buildings, SNI 1726:2019 on Earthquake Resistance Planning Procedures for Building and Non-building Structures, and SNI 1727:2020 on Minimum Loads for Building Planning and Other Structures are applied. This study uses SAP2000 V26 software for structural analysis and AutoCAD 2025 for building modeling. The airport facilities workshop building, measuring 6 × 10 (m), is designed as a single-story steel structure. Profiles used: CNP 150.50.20.2,3 for purlins; WF 300.150.6,5.9 for columns and regents; WF 250.125.6.9 for rafters; WF 150.75.5.7 for consoles; and D10 for wind braces. The cost estimation shows a total construction cost of IDR 388.000.000,00 including 11% VAT.