Perkembangan konstruksi modern mendorong inovasi desain struktur, salah satunya adalah penggunaan kolom pipih pada bangunan bertingkat rendah seperti rumah dua lantai. penelitian ini bertujuan untuk menganalisis kekuatan struktur kolom pipih dalam menahan beban aksial, momen lentur, serta kombinasi beban mati, hidup, dan gempa, khususnya pada bangunan di perumahan tarakan city square. penelitian dilakukan dengan metode studi kasus dan pendekatan kuantitatif, menggunakan software sap2000 dan sp-column untuk simulasi pembebanan serta analisis kekuatan struktur. model struktur tiga dimensi bangunan dua lantai dibuat dengan mengintegrasikan data geometrik dan pembebanan sesuai standar sni. analisis interaksi beban aksial dan momen dilakukan menggunakan diagram p-m untuk menilai kinerja dan kapasitas kolom pipih dalam berbagai kondisi pembebanan. hasil simulasi menunjukkan bahwa kolom pipih dengan desain dan penulangan yang tepat dapat memenuhi standar kekuatan struktur sesuai sni 2847:2019. namun, perhatian khusus diperlukan terhadap rasio kelangsingan dan penempatan tulangan transversal guna mencegah kegagalan akibat tekuk lateral dan geser. penelitian ini menghasilkan rekomendasi desain struktural optimal untuk kolom pipih, khususnya dalam konteks wilayah geografis kota tarakan. temuan ini diharapkan menjadi referensi bagi perencana, pengembang, dan insinyur struktur dalam menerapkan kolom pipih secara efektif dan aman. selain itu, penelitian ini memberikan kontribusi terhadap pengembangan pedoman teknis serta efisiensi ruang dalam desain perumahan bertingkat rendah di indonesia. kata kunci: kolom pipih, struktur bangunan, sap2000, beban gempa, diagram p-m, desain struktur

The advancement of modern construction practices has driven innovation in structural systems, including the application of flat column designs in low-rise multi-story buildings such as two-story residences. this study aimed to analyze the structural strength of flat columns under axial loads, bending moments, and a combination of dead, live, and earthquake loads, with a specific focus on buildings in the tarakan city square residential area. employing a case study method with a quantitative approach, simulations were conducted using sap2000 and sp-column software. a three-dimensional structural model of a two-story building was developed by integrating geometric configurations and loading data based on sni (indonesian national standard) guidelines, the interaction between axial and moment loads was conducted using p-m interaction diagrams to assess column performance and capacity under various loading scenarios. the simulation results indicated that, with proper design and reinforcement, flat columns satisfied the structural strength requirements as per sni 2847:2019. however, critical factors such as the slenderness ratio and the configuration oftransverse reinforcement were found to significantly influence resistance to lateral buckling and shear failure, this study offers practical recommendations for the optimal structural design of flat columns, especially considering the geographical and seismc characteristics of tarakan city. the findings are expected to serve as a reference for planners, developers, and structural engineers in ensuring safe and emcient flat column applications. furthermore, this study contnbutes to the development of technical guidelines and space-efficient design practices tor low-rise housing in indonesia, keywords: flat column, building structure, sap2000, earthquake load, p-m diagram, structural design