automatic door locks

[Todd M.]

Hello,

I have a 4 plex with a common door with access to utility room. Tenants are suppose to keep this door locked (deadbolt and regular handle lock) at all times. Well, they don't and I had a "break in".

Thieves came in and busted off the coin boxes from washer and dryer.

I'm looking for ways/ suggestions to keep that common door locked at all times. Is there some kind of automatic door lock?

Thoughts?

Thanks in advance,
Todd

[Chris Stach]

"Janitor Function" or "Classroom" lock is what you want. Call a random local locksmith, locks that do this are pretty common, they'll know exactly what you need.

You could put a timer and a door position switch on the lock to make a sounder go off if it's open more than 20 seconds. This is something you often see on commercial high rises on exit doors to prevent people from propping them open.