Design principles · Practical applications · Professional development · Guide to Joint Fixity in Structural Modelling

How many times have you been up against a deadline and just idealized a connection as “pinned” or “fixed” to get the analysis to run? We’ve all been there. For decades, this simplification has been the bedrock of frame analysis, a necessary shortcut when we were armed with little more than slope-deflection and moment distribution. But in today’s world of performance-based design and powerful FEA software, clinging to this binary view isn’t just conservative—it can be inaccurate and uneconomical.

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