Changing the angle of joists in a beam system despite what the boundary is.

[Anonymous]

I'm working on a parking garage using Revit 2018. This is my first soirée using the program. I figured out how to use beam systems, including some changes to the spacing.

Now, however, as you'll see from the picture below, I have to change the layout of the joists from a NE/SW angle to a N/S (90 deg) angle. I don't see how to do this, and reviewing the Help isn't really helping

How do I do this? I have a suspicion that I'm going to have to put these in manually... at least that's my first solution.

Thanks!

[ArmanMargaryan]

Can you elaborate on what NE / SW means?  

There is nothing mentioned in the attached picture.

[Karol_Piroska]

all you have to do is to specify the beam direction using the beam direction linework. It doesnt have to be specified by the boundary lines. See screenshot below