Slender beams (concrete beam: EC2)
Second order effects associated with lateral instability may be ignored if beams are within the geometric limits given by the following;
L0t |
|
50*bcomp/(h/bcomp)1/3 |
and | ||
h/bcomp |
|
2.5 |
where
L0t |
|
the distance between torsional restraints, which in Tekla Structural Designer is taken as the distance between the faces of the supports |
h |
|
the total overall depth of the beam at the centre of L0t |
bcomp |
|
the width of the compression flange of the beam ( = bw for rectangular sections and beff for flanged beams) |
If either of the above checks fail then a Warning is displayed.