You could achieve this in AC18.
Building Materials no longer merge, so you can split the fills for the beams to create the x, and also every edge of a fill is customisable (which is also available in previous versions) but now you can turn edges off.
I don't see the need for any lines in that image. Just fills with customisable edges.
But I see you are using AC16, so there's a few more workarounds to get the x of the beams to show - by using two different fills so they don't merge.
James Badcock
Graphisoft Senior Product Manager