That tiny hole you see on the elevator door? It might just save your life. Say the elevator you’re in stops at a floor and the doors don’t open. It could be a power failure or an equipment malfunction. But getting out isn’t easy. Elevators are equipped with lots of features to keep the doors from opening randomly or when they’re between floors.
“What you’ll usually see is the fire department, or sometimes the building mechanic, will get on site and use some procedures to get the people out while the problem is being worked on and hopefully repaired,” says Robert Solomon, the director of building, life safety codes, and fire protection systems for the National Fire Protection Association.
That’s where those small holes come in. Opening the doors requires a special tool called a hoistway door unlocking key. It gets inserted into the door to release the landing door. Since the fire code began requiring them in the 1970s, manufacturers such as Otis and Schindler have equipped their elevators with them. Learn the real reason why escalators have grooves, while you’re at it.
The keys are usually held by a restricted number of people, such as an elevator mechanic or building superintendent. The fire code also requires that special access tools for each building be kept in a secure location such as a Knox Box that firefighters can open.
Fortunately, it’s rare that using the keys is necessary, Solomon says. Next, find out 50 interesting facts about practically everything.