How much weight can a garage door opener lift.
How much wight garage door.
Garage door weight is determined by size material steel gauge thickness insulation and glass.
It should be noted that since the cable loops around a pulley the lifting force of a 210 pound spring is only 105 pounds as seen by the garage door.
Door weight is important when trying to figure out what torsion or extension springs are needed to counterbalance the door.
Based on this rating a 1 2 hp opener be able to lift about 185 pounds and a 3 4 hp opener should be able to lift over 370 pounds.
If you have a heavier door that weighs more than 150 pounds with one spring still wound you will need to use 2 scales and position them under the first row of hinges from each end of the garage door.
The average modern steel single car door weighs around 125 pounds while double car doors weigh about 200 pounds.