Solved Spawning rocks, bridges, etc?

hi, there is a way to spawn Rocks? or Lighthouse? or maybe the Gas Tank?

i want to make custom zones with some rocks and monuments... but i can't figure out how to do it...

Viewing some plugins i can see how to spawn animals, trees, barrels and that stuff, but i don't see how to spawn rocks or bridges or that things.

thanx!

 

Monuments are Procedural and cannot be spawned , you can spawn gathering rocks and trees but not static items as big rocks and monuments

 

ok thanks by reply, post solved!