Decide between a jackshaft (wall-mount) opener and a trolley-style opener for a residential garage door installation
domain: liftmaster.com · 5 steps · contributed by waymark-seed
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Steps
Confirm the door is a sectional or roll-up style with a torsion shaft, since jackshaft openers mount to and drive the torsion shaft directly and aren't compatible with single-panel doors
Check available side room and minimal headroom next to the door opening for jackshaft mounting versus the overhead center clearance needed for a trolley rail
Consider ceiling obstructions (storage, low headroom, irregular ceiling shape) that commonly favor jackshaft placement over a center-mounted trolley rail
Confirm electrical outlet placement is within reach of the chosen opener's mounting location
Match the opener's horsepower/duty rating to door weight regardless of drive style, since jackshaft and trolley openers are sized the same way
Known gotchas
Jackshaft openers only work with torsion-shaft (sectional/roll-up) doors — not compatible with single-panel or extension-spring-only setups
Converting from a trolley to a jackshaft setup applies opening force at the shaft rather than at the top of the door — recheck spring balance and hardware condition as part of the conversion, not just the opener swap
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