"canncann" wrote in message
news:079dee6b90dc0a42be0d951008d6c9e4@homerepairli ve.com...
Can you shorten a chain driven garage door opener? I have 118" between
wall and beam in center of garage and the opener is 124".

The difference is only 6". You should have no problem shortening the rail
and chain.
But couldn't you use a "quick-close" bracket and have the head of opener go
under the support beam?

Rich
http://www.garagedoorsupply.com