Why springs are so dangerous

A torsion spring on a typical residential door is wound to roughly seven full turns — about 280 degrees of stored rotational energy per pound of door weight. On a 200 lb double door that is enough energy to throw a steel winding bar across a garage. When a spring fails under tension, the energy goes wherever it finds an exit — usually the cone, occasionally a hand or arm.

What is safe for a homeowner to do

  • Pull the red manual release and walk the door up by hand to check balance
  • Visually inspect coils for a one- to two-inch gap (the signature of a break)
  • Lubricate the spring coils with a garage-door-rated spring lube — never WD-40
  • Photograph the spring and tag for a tech to identify wire size and length

What is not safe for a homeowner to do

  • Loosen any set screw on the spring cones
  • Use rebar, screwdrivers, or pipe in place of winding bars
  • Replace a spring without first locking the door in the closed position
  • Adjust spring tension on a door that is already partially open
  • Replace one spring on a two-spring door without replacing both

The four safety practices we still follow on every job

1. Door stays closed and clamped

Two C-clamps on the track just above each bottom roller. If anything slips, the door cannot run up the track and gain momentum.

2. Proper winding bars only

Hardened steel, correct diameter for the cone holes, never substitutes. The bar stays in the cone with positive pressure at all times until the second bar is inserted in the next hole — this is the "always two bars" rule. A bar should never come fully out of the cone under load.

3. Hands and face out of the line of release

If a cone slips, the bar travels in the direction of unwinding. We stand to the side of the spring, not in front of it, and never directly under a wound bar.

4. Balance test before reconnecting the opener

After winding, the door should float at the midpoint, fall slowly from shoulder height, and rest closed without help. A door that drifts up is over-wound; one that slams down is under-wound. Both get re-tensioned before the opener arm goes back on.

What to do if a spring breaks while you are home

  1. If the door is closed, leave it closed and call for service.
  2. If the door is open, step out of the door's path and unplug the opener at the ceiling.
  3. Do not pull the red release on an open door with a broken spring — it can fall under its own weight.
  4. Move cars out of the bay only if you can do it without stepping under the door.
  5. Call a real garage door company — not a handyman, not a general contractor.

One last note

The instinct after a loud bang in the garage is to investigate. That is fine. The instinct to immediately try to fix it is the one that sends people to the ER. A broken spring is not an emergency — it is a stuck door. Service techs are usually onsite within a few hours across Richardson, Plano, Allen, and the rest of North Dallas.