They no longer activate if you place the trap next to doors. When the door opens it blocks the line of sight for the trap. People can walk right by them making the traps fairly ineffective at the dou...
For this door: The hinge is on the right, the opener is on the left. You're inside trying to defend the area.
If you:
0. Put the trap exactly in front of the door, you will basically lock this door, enemy has to destroy it to open it up and trap will trigger. The trap won't trigger if they just stand on the other side.
1. Put the trap on the left side, it will absolutly trigger when the door open or enemy peek the window.
2. Put the trap on the right side, when the door open and enemy walk in, the door itself shield the enemy from trap sensor so it doesn't trigger.
Especially if they turn right after entering the building. If they walk straight, it might but the effect will be minimum.