Buckling of the compression flange of a girder, without transverse stiffeners, can be avoided if (with standard notations)
1
\(\frac{d}{{{t}_{w}}}\le 345\epsilon _{f}^{2}\)
2
\(\frac{d}{{{t}_{w}}}\le 270\epsilon _{f}^{2}\)
3
\(\frac{d}{{{t}_{w}}}\le 345{{\epsilon }_{w}}\)
4
\(\frac{d}{{{t}_{w}}}\le 250{{\epsilon }_{w}}\)
5
\(\frac{d}{{{t_w}}} \le 67{\varepsilon _w}\)