timber beams as lateral support for steel beam?

[mats12]

I am dealing with a steel beam (8 m span, simply supported).
Perpendicular to this steel beam there are timber beams laying on top of steel beam.
This timber beams are fixed to the steel beam in one side and on the other side they are fixed on a RC inverted beam.
Since steel beam is relatively long, I'm wondering about buckling (because of bending)of compression flange (I dont know what is the proper expression for this phenomenon in English language).

Can I consider timber beams (spacing between them is 1,10 m) as lateral supports in that case? On top of timber beams are wooden boards.

 

[KootK]

The timber beams should be fine as lateral torsional buckling bracing for the steel so long as the timber beams themselves are restrained by a diaphragm or lateral support reaction at the far end. AISC appendix six deals with the required strength and stiffness of bracing in north america. I'd be comfortable just ok'ing something like this based on judgement however.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[BAretired]

The unsupported length of the beam may be taken as 1.1m provided each timber beam and its end connections are capable of resisting a force perpendicular to the axis of the braced member equal to 2% of the factored compression in the flange of the braced member (Simplified Analysis). Alternatively, a detailed analysis may be carried out to determine the required strength and stiffness of the bracing system.

BA