Free Download spColumn 10.20 | 45 Mb spColumn is structural engineering software for designing and investigating reinforced concrete sections subject to combined axial and flexural loads. Top-selling worldwide, spColumn delivers a clean and simple interface for model editing and 3D visualization of the nominal and factored failure surfaces. Batch processing and integration with AutoCAD and ETABS are some of the many program features. Obtain the P-M interaction diagrams of rectangular, round, or irregular sections with any reinforcement layout to determine strength under the combined effects o