I have a column which is part of a sway frame, pinned connection assumed at base plate, so it basically acts as a cantilever with load at the end. When calculating αm to AS4100 5.6 what sort of restraint can I use at the base plate? If the critical flange is unrestrained then αm=1.25 (Table 5.6.2); if it is laterally restrained then αm=1.75 (Table 5.6.1).
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