The main difference between a stiffened baseplate and an unstiffened baseplate lies in their structural design and ability to resist bending moments and shear forces:
Stiffened Baseplate: This type of baseplate includes additional stiffeners, typically in the form of ribs or gussets welded to the plate. These stiffeners enhance the baseplate’s rigidity and ability to transfer loads more efficiently between the column and the foundation. Stiffened baseplates are commonly used when the column imposes significant bending moments or shear forces onto the baseplate, requiring additional stiffness to prevent excessive deflection or failure.
Unstiffened Baseplate: An unstiffened baseplate lacks these additional stiffeners. It is typically used in situations where the column loads are relatively lighter and do not induce significant bending moments or shear forces. Unstiffened baseplates are simpler in design and fabrication, often suitable for smaller or less demanding structural applications where the forces are adequately managed without the need for additional stiffening elements.
In summary, while both types serve to anchor columns to foundations, stiffened baseplates provide enhanced stiffness and load transfer capabilities, whereas unstiffened baseplates are simpler and sufficient for lighter loads and less demanding structural conditions.