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Re: cantilever T-beam

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Gary, does that mean that a bridge with side trusses which support the deck on the bottom member does not have a potential buckling problem of the top chords under the compression load ?  Your explanation is logical, but I hadn't thought about it before. 
I'm thinking of a short steel footbridge I have to do soon.  I was concerned about buckling of the top chord (which is also the hand-rail). 

On 3/29/07, Gary L. Hodgson and Assoc. <ghodgson(--nospam--at)> wrote:
You might look at where the load is applied on the cantilever.
Nethercott in Britain then Galambos in the USA gave descriptions of the
appropriate length factor for cantilevers.  If the load is applied above
or below the neutral axis determines whether the beam can buckle
sideways.  For example, I get involved with a lot of crane runways, e.g.
a single monorail beam cantilever,  loaded on the bottom flange, cannot
buckle to the side as the vertical load is counteracting the tendency to
buckle sideways. Hope this helps.