WARose as BAretired says, simply tying them together is not sufficient. BS5950 and EC3 have statements to that effect. BS449 is not clear how it accounts for LTB and if indeed the allowable stress design tables do consider it. The article tempeng has posted gives information.
I am hoping that this might be an easy one for anybody with experience of BS 449. How does (if it does) the code deal with Lateral Torsional Buckling?
BS 5950 directly state that simply tying members together does not constitute restraint unless an adequate bracing system is in place to...
