Doodad placement

Ive been trying to edit doodads such as rack of weapons to make stockade wall look more intersting, but unlike barrels, you cant place weapon racks and several other doodads so that they overlap, is thee any way to change this?

You can either change the pathing map to something without pathing like a mushroom pathing map, or you can press shift while placing your doodad which turns off collision. Wow long sentence.