Which is the best way to cut a lock on a multi-lock door?

The best way to cut a lock on a multi-lock door is to cut an inverted triangle on the lower quadrant of the doorknob side. This method is effective because it targets the more vulnerable part of the door where the locking mechanisms are typically located, allowing for easier access to the internal locking components.

By cutting the inverted triangle in this specific area, firefighters can create an opening that gives them a better angle to manipulate or force the lock open without damaging the structural integrity of the majority of the door. This approach also minimizes the risk of accidentally damaging surrounding areas, which could complicate access further.

Additionally, targeting the lower quadrant is often preferred as it allows for better leverage and access, especially when dealing with the door’s handle and latch mechanism. In contrast, other methods may either overcomplicate the entry process or lead to unnecessary damage to the door itself.