The jackshaft type inhabits much less room. The cart type includes trolley connected to the door and additionally to the electric motor. This inhabits room in the ceiling however is extra prominent because it is safer.
This is extremely important! As a home-owner, your home in Dallas may be your most valuable asset by far, right? You may even owe hundreds of thousands of dollars still on your mortgage. (This is written primarily to home-owners, so if you are the owner of a commercial building in Dallas, then the same issues will apply to you except probably with much larger dollar amounts.)
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