The GT model is a heavy industrial-duty trolley door opener, as manufactured by The Chamberlain Group and is for use on standard lift sectional doors. It is rated for 25 cycles per hour constant high loading. In excess of 90 cycles/day. Trolley type door opener. Voltage/phase : Single-Phase: 115 V and 230 V. 3-Phase: 208 V, 230 V and 460 V, 575 V.. Our innovative products, combined with intuitive software solutions, are part of a myQ ecosystem that delivers seamless, secure, access to people's homes, communities, and businesses. Read our story. Browse all commercial door openers from LiftMaster. Run your business smoothly with security features, extended hardware life and business.

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LiftMaster®, the world's number one brand of professionally-installed residential and commercial garage door openers, connects satisfied customers to LiftMaster dealers in Irvine, CA every day. Explore names of dealers close to you, including the services they offer and their contact information. Use our custom filters to find residential.. Learn more about heavy duty commercial garage door openers from LiftMaster. Our light duty garage door operators have less down time & more durability. text.skipToContent text.skipToNavigation.. LiftMaster heavy-duty commercial door operators have it covered. Built to exceed any demand, they'll always keep things running smoothly and safely.