Re: STEEL STORAGE Hello; Since you only have 2 openings, if you pass through the purlin splitting, the moment diagram will give more suitable design results because of the gerber beam logic. Accordingly, the editing was done in your model. Apart from this, your side axles also have a relative translation problem, the reason is that when the beams are articulated connections, you either need to increase the beam sections or you need to make that direction also moment-transmitting. Instead of these, the problem was solved by continuing the crosses on the roof. Consider the moment-transmitting or central braced system in 2 directions during the installation of the load-bearing system. Otherwise you have to increase the cross section too much to ensure stability. Good work.