3) With one person on each side, raise the door a bit to remove the
stop blocks and lower it to the floor. Garage doors can weigh hundreds
of pounds, so work with a helper. Lift the door and insert a bathroom
scale under the center of the door, then lower the door onto the scale.
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4) If the door's weight exceeds the capacity of your scale, place the
scale inside the door and rest a 2-by-4 on the scale and on a block of
wood outside the door. Lower the door onto the 2-by-4 and double the
weight measurement to determine the required spring capacity. |
