When a structure is located in geographic areas with a seismic design category of B or higher, additional seismic detailing for splices may be required per AISC 341-10 (AISC, 2010b). To help supplement this information, several HSS splice options are discussed below. Part 14 of the AISC 15th Edition Steel Construction Manual (AISC, 2017) discusses detailing and splice options for dealing with these issues for the traditional wide flange columns, but unfortunately does not address HSS columns. It is critical for the splice to ensure axial forces are transmitted concentrically from the upper column to the lower column to avoid adding flexural moments due to eccentricity that have not been designed for. The splice design and detailing should consider the fabrication process and field erection as much as possible. The function of the splice is to transfer the axial, shear and flexural forces from one column piece to the next ensuring continuity of the column and stability during erection. Depending on the geometry and floor plan of the building, there may be times when construction sequencing requires a splice to prevent interference during installation of various portions of the building structure and components. Another reason for a splice may be to simplify construction in the field. roadways, a good rule of thumb is to assume a maximum column length of 55 to 60 feet. Due to typical transportation limitations on U.S.
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