What are you seeing?
Make sure a dashed line is set for the beams hidden line type.
And if you use a 100% solid cover fill on your slab you may have to adjust the display order so it is behind the beams.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11