@dimedius
I saw your 1.1 version. Great progress.
I like to use this native to get the hash for readability (called once):
Hash secBarrier1 = GAMEPLAY::GET_HASH_KEY("prop_sec_barrier_ld_01a");
Hash secBarrier2 = GAMEPLAY::GET_HASH_KEY("prop_sec_barrier_ld_02a");
Saw that you're already using Codewalker after writing this.
But for others:
Codewalker is a great tool to find out the name, hash of objects etc. You can move around in the world finding them.

(Press Load DLC, Press T, Press select objects, Right click on an object gives info to the right.