D5.D.3.6 Clause 22.214.171.124 – Slenderness for flexural buckling
The Dutch NA requires the implementation of clause 126.96.36.199 and 188.8.131.52.2 of NEN 6770 and clause 184.108.40.206 of NEN 6771.
Clause 220.127.116.11 (NEN 6770)
This clause gives the equations to evaluate the effective lengths for various support conditions. STAAD.Pro uses the effective length factor "K" which allows the user to set/modify the effective lengths for a member.
Clause 18.104.22.168.2 (NEN 6770)
This clause gives methods to evaluate the buckling length of lattice sections. We do not deal with latticed section in the current version of STAAD.Pro. In any case the buckling length can be adjusted using the "K" factor.