Hi I am doing lots of unistrut sections where we have special channels, back to back channel, box sections, which I can add in to cold rolled section library using section wizard. However, I can not design back to back channel with lips using BS 5950. Also, this standard is withdrawn and it will be useful, if I can deign all cold rolled section using EN 1993-1-3. is. Is that something that can be looked at ?