How do garage door safety beams work?

Answer by  changa60 (28)

This is a very nice feature.The beams are installed on both sides of the garage door.If you are putting the garage door down,and something goes through that beam,the garage door will go back up.This is good in case a little child gets under the door somehow,the door wont come down.

Answer by  Anonymous

It times the amount of time it takes for the IR beam to bounce to and from, where it started. If someone was to intercept the IR beam, then the feedback signal will come back quicker than it is supposed to be, and therefore the garage door will not close.

Answer by  Jane42 (201)

If something breaks the beam of infrared light that constitutes the safety beam, the sensor will cause the garage door to go back up, preventing a tragic accident.

Answer by  SandyG (807)

You will see red lights at the right and left side of your garage door near the floor. When anything is directly in the door opening, the light beam will detect it & not allow the door to go down.

Answer by  fiendishredhead (179)

The beams extend across the bottom of the garage door and hit sensors. When an object disrupts the beam of light, it prevents the light from hitting the sensor. This is how garage door safety beams work.

Answer by  mb (5482)

The safety beams on your garage door have a tension spring that doesn't allow the door to fall to quickly, thus preventing injury.

Answer by  salsafoodie (3146)

Garage boor safety beams work by the safety sensors. When the sensors activate then the beams are used to pull up the garage door and hold it in place in order not the fall on the item that is blocking it and possibly break the garage door. You should have your beams check to make sure they work.