When estimating effective length factor K for nominally pinned beam–column sway frames, what practice best ties simplified frame models to lateral-bracing assumptions in referenced building standards?
Choices
- (A) Ignore restraint if beams pin-connect to columns mechanically
- (B) Represent end/fixity and restraint per the numerical model then read K from alignment-chart style methods per the referenced code
- (C) Assume K=1.0 for every story blindly
- (D) Use storey height alone ignoring framing participation
Correct answer: (B)
Represent end/fixity and restraint per the numerical model then read K from alignment-chart style methods per the referenced code
Explanation
Documented restraint state prevents optimistic flexural overstrength guesses.