Reply to "Garage door shut off"

There is also this bar shown in the photo near the end of the door travel track that I was thinking may be some electrical shut off on the other end of that bar as the metal door traveler hits it. So as the wife set the door in motion with the garage door switch, I hit this bar hard with a hammer to see if it would stop the door moving, but no, the door kept moving. This metal bar does slide in and out though on the tack, and as shown is sitting in the end position. But there is nothing to attach it to when sliding it around up and down the track, as it just slides freely by hand.