Can zombies vault over or pass through sandbag fences?

[MajPayne21 10]

I'm curious if, as the title says, zombies can somehow get through sandbag fences. I've noticed in-game that the military/hospital camp near Balota is completely surrounded by wire and sandbag fences, and the zombies that spawn with the deerstands in there never seem to follow anyone out if they vault over the sandbag wall to escape. This leads me to believe that zombies are unable to pass through sandbags, aside from the all-too-common clipping through walls bug.

The reason for the question is that there's already a nice sandbag and wire fortification along the railroad tracks relatively near the military camp in Cherno, and I was thinking of making a sandbag and wire fence for the rest of that area as a possible safe zone or base style area for some player interaction fun.

If the sandbags keep zombies out, that would be even better! The area even has a covered structure to provide some cover from bandit snipers.

Anyone know if zombies can get over sandbags aside from clipping through them unintentionally?