Difference between simple bar and beam

[giyotd]

hey,

I want to design a steel structure elements on robot,

however i am getting confused by the member type between simple bar and beam.

Both give different results of ratio and one take into consideration lateral buckling the other no. for example bar 88 see attached dwg.

What should I use usually please can you help me.

http://www.filemail.com/d/kisbwnjvunyglqb

Regards,

George

[Artur.Kosakowski]

Defining member type for bar 88 should you consider which elements of the model you consider as prevent buckling and lateral buckling. If the slab is such restrain then you may set no LTB for the top flange and assume that it also prevents buckling of the beam in the horizontal direction. For buckling in the vertical direction for simply supported beam you usually assume 1.0 coefficient. 

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.