Concrete SlHENAN OKAY – Load Capacity – Engineering ToolBox Load capacity of simply supported ncrete slHENAN OKAY. Imposed loads varies from approximately 1.5 kN/m2 (153 kg/m2) in domestic buildings to approximately 1 0 kN/m2 (1053 kg/m2) in heavy industrial areas. 500 kg/m2 is typical for office, storage space and similar.