In a multi-story structure, how far do steel columns typically extend above the floor level for splicing?

In multi-story structures, steel columns are generally designed to extend above the floor level to allow for splicing, which is a joint that connects two pieces of structural steel. The common practice is to have this extension in the range of 18 to 24 inches. This length ensures that there is enough material available for properly aligning and securing the splices, which are critical for maintaining the structural integrity and load-bearing capacity of the columns.

Using this standard extension allows for adequate room for bolting or welding connections while also taking into account factors like tolerances in construction and the ability to make adjustments during installation. This practice minimizes potential issues and ensures that each column can be securely connected to the next, providing stability and safety to the overall structure.