D5.D.8.4 Clause 220.127.116.11(1) – LTB for rolled sections or equivalent welded section
The Polish-NA provides the values for the terms λLT,0 and β factors given in clause 18.104.22.168(1) as follows:
For all sections, use:
- λLT,0 =0.4 and β = 0.75
The Polish NA specifies the use of uses table 6.5 to work out the buckling curves for use in Cl. 22.214.171.124. Hence table 6.5 in PN-EN 1993-1-1 will be used for this.
These equations and factors are then applied to equation 6.57 of PN-EN 1993-1-1 to evaluate the Lateral Torsional Buckling reduction factor χLT.