Any mods to make NPCs attack props?

I could be imagining things, but I could swear at one point I found a mod that would allow NPCs to attack props to get to you. (I.e. zombies attacking wooden fences to break through your wooden fort)

Does anyone know if there’s something like this? I can’t find anything on garrysmod.org

http://www.garrysmod.org/img/?t=dll&id=40644