Nanda Tria Yasinta, Inge Anggitasari, Cahyo Purnomo Prasetyo and Susilowati Susilowati 2025. Design of Reinforced Concrete Floor Slabs in a 3-Story Office Building in Lumajang Regency. International Journal of Health Engineering and Technology. 4, 4 (Nov. 2025). DOI:https://doi.org/10.55227/ijhet.v4i4.446.