What if the gates are mounted onto the middle of brick columns?
For a single gate only, you will need to allow 1½” extra to attach the latch keeper onto the column. (So a 48″ gate needs a 49½” opening.) Let your Customer Service Representative know when you are ordering a gate for this type of installation, and they will supply you with a small piece of aluminum channel to attach the keeper to the middle of the column. For large industrial gates, you will have to cut off one side of the hinge to mount it on the column. Be aware that such installations require that the wall or column be absolutely plumb for the gate to work properly, so you may want to consider using gate posts.