so, in f360, the way I’d do it is to create a is create a pair of pillars- one in each direction- then create patterns. use the combine tool to join them into a single body. Then I’d create the top and bottom of the box. When using the combine tool, I would advise not selecting ‘keep tools’. this will help keep you from bogging down the computer and you can always go back in your history. (its a problem in f360 whenever you start going crazy with patterns. or patterns of patterns…)

but it should be okay if you stagger the braces, I’ve had some idiotic design choices myself. (including a spirally-fin-shaped lamp shade that would have looked sWeEt. like a long sort of jet turbine. except it was 200mm tall and the fins were bobbing and weaving. ooops. sometimes it’s only obvious in retrospect.)