Ladder column
Ladder column
(OP)
I have a vertical wind column which is in the form of a ladder with outside and inside chords 300mm apart and rungs @ 300c/c. The column is oriented such that the wind is parallel to chords(side of ladder). The tributary wind area is 8'x40' (wxh). The outside chord is pinned at top and bottom.
All the members are welded and are of 4"x4"x0.095" thick.
Can it be taken as a truss or not? Since there are no diagonal web members and it is not acting as Viendeel truss also.
I need to calculate section modulas Sxx (in the plane of chords)for the ladder column.
Any help/guidance will be greatly appreciated.






RE: Ladder column
RE: Ladder column
The web member itself is not capable of taking the moment at the junction of chord and web. I have around 15kn-m of moment at this junction if I treat it as a vierendeel truss. All members are only 12gauge thick.
RE: Ladder column
RE: Ladder column
Never, but never question engineer's judgement
RE: Ladder column