LTB for Cantilever Beams for CAN/CSA-S16

[GalileoG]

Does the Canadian steel code have any special considerations for lateral torsional buckling of cantilever beams? While I am not familiar with AISC, I believe AISC makes a special allowance for cantilever beams. I have not found a similar allowance in CAN/CSA-S16.

Clansman

If a builder has built a house for a man and has not made his work sound, and the house which he has built has fallen down and so caused the death of the householder, that builder shall be put to death." Code of Hammurabi, c.2040 B.C.

 

[BAretired]

Article 13.6 (d)states "For cantilever beams, a rational method of analysis taking into account the lateral support conditions at the support and tip of cantilever should be used."

BA

 

[Hacksaw82]

I recently went through the codes (AISC and CAN/CSA) looking for this issue. Neither do a good job addressing this issue, and give the typical "rational method" double talk.

At least AISC gives some references in the commentary which turned out to be quite useful. One was Structural Stability of Steel by Galambos. I also found a text book, Behaviour and Design of Steel Structures to BS 5950 by Nethercot. Both look at the stability of a cantilever and the orientation of the load and tip supports (if any) and apply factors to the unbraced length to account for the unstability.