PT. INHUTANI 1 UMI (Unit Manjerial Industry) adalah bangunan workshop yang menggunakan material baja WF (wide flange) yang disusun dalam bentuk portal gable. Penggunaan material baja sebagai bahan konstruksi workshop sangat cocok dan tepat, karena bangunan akan jauh lebih efesien, Namun, baja memilki kekurangan yaitu sangat rentan terhadap fenomena korosi. Untuk mengetahui kondisi kapasitas struktur portal gable pada bangunan workshop PT.INHUTANI 1 UMI (Unit Manjerial Industry) Juata Laut kota Tarakan dilakukan perhitungan struktur berdasarkan SNI 1729:2020, SNI 1727:2020, dan SNI 1726:2019. Hasil analisis gording baja yang telah dilakukan, esain pembebanan SNI 1727:2020 didapatkan Mu = 5,55 kNm < ϕMn = 11,57 kNm, Vu = 2,68 kN < ϕVn = 29,600 kN dan lendutan Δ = 21,75 mm < Δ ijin 25 mm, sehingga gording eksisting masih dalam ondisi yang aman., analisis dilakukan berdasarkan beban-beban yang bekerja dan kombinasi pembebanan. Spesifikasi untuk bangunan gedung baja struktural mengikuti syarat SNI (1729-2020) Beban angin mengikuti syarat SNI 1727-2020, dan kombinasi pembebanan mengikuti syarat SNI 1729-2020. Hasil analisis struktur rafter terhadap kontrol gaya lentur , kekuatan geser, dan tekan aksial nominal dengan syarat Mu = 49,17 kNm < ϕMn = 181,62 kNm dan Vu = 23,66 kN < ϕVn = 341,71 kN. Analisis Tahanan Geser Pada Struktur Kolom Mu = 17,02 kNm < ϕMn = 126,97 kNm, Vu = 14,65 kN < ϕVn = 341,71 kN.

Kata Kunci : Baja, SNI, Struktur Portal Gable, SAP 2000, Workshop.

PT. INHUTANI 1 UMI (Unit Managerial Industry) is a workshop building utilizing WF (wide flange) steel arranged in a gable portal frame. The use of steel material for workshop construction is highly suitable and efficient. However, steel has the disadvantage of being susceptible to corrosion. To assess the structural capacity of the gable portal frame at the PT. INHUTANI 1 UMI workshop in Juata Laut, Tarakan City, structural calculations were conducted based on SNI 1729:2020, SNI 1727:2020, and SNI 1726:2019. The results of the steel purlin analysis, using the SNI 1727:2020 load design, indicated Mu= 5.55 kNm < ϕMn = 11.57 kNm, Vu = 2.68 kN < ϕVn - 129.600 kN, and deflection Δ = 21.75 mm < permissible Δ = 25 mm, showing that the existing purlins are in a safe condition. The analysis was performed based on the applied loads and load combinations. The specifications for structural steel buildings comply with the requirements of SNI 1729:2020, wind loads follow the requirements of SNI 1727:2020, and load combinations adhere to SNI 1729:2020. The rafter structure analysis results for bending moment control, shear strength, and nominal axial compression showed Mu = 49.17 kNm < ϕVn = 181.62 kNm and Vu=23.66 kN < < ϕVn -341.71 kN. The shear resistance analysis for the column structure showed Mu= 17.02 kNm < ϕMn - 126.97 kNm and Vu = 14.65 kN < < ϕVn =341.71 kN. Keywords: Steel, SNI, Gable Portal Structure, SAP 2000, Workshop.