ANDRISMAN SATRIA; CHAIRA; YUNITA ARAFAH. STRUCTURAL ANALYSIS OF SPACE EXPANSION OF CONCRETE BUILDING WITH RETROFITTING STEEL PORTAL. International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET), [S. l.], v. 3, n. 7, p. 1475–1480, 2024. DOI: 10.54443/ijset.v3i7.532. Disponível em: https://ijset.org/index.php/ijset/article/view/532. Acesso em: 11 sep. 2025.