Que che din realmente as táboas de tamaños de resortes de extensión da porta de garaxe?

O resorte da porta do garaxe está roto, e unha táboa de tallas parece a resposta sinxela. Pero usar o resorte incorrecto pode facer que a túa porta sexa insegura, danar o teu abridor, ou incluso provocar un fracaso catastrófico.

Un cadro de tamaño de resorte de extensión da porta do garaxe é unha ferramenta de referencia que combina o peso da porta do garaxe cun resorte específico, que se identifica polo seu código de cores e lonxitude. Está deseñado para axudarche a atopar un substituto preciso para os teus resortes existentes.

I've been manufacturing springs for over 14 anos, e podo dicirche que os resortes das portas do garaxe son algúns dos produtos máis perigosos que fabricamos. Operan baixo tensión extrema, sostendo centos de quilos de forza a poucos polgadas da túa cabeza. Unha táboa de tallas é un bo punto de partida, but it's not a magic solution. Unha vez tiven unha chamada frenética dun propietario que utilizara un gráfico para substituír os seus resortes. He'd matched the color, but the door still wouldn't open correctly. Resultou que a súa porta era unha porta de madeira feita a medida que era moito máis pesada que o estándar. O gráfico que utilizaba era para as portas de aceiro. É por iso que non basta con mirar un gráfico: tes que entender o que realmente significan os números.

How Do You Find Your Garage Door's True Weight?

Pensas que a túa porta pesa 150 libras, pero adiviñar é un gran erro. The wrong guess leads to installing a spring that's either too weak to hold the door, creando un serio perigo de seguridade, or too strong, que danará o teu abridor.

Debes pesar a porta para obter unha medición precisa. O único método seguro e fiable é desenganchar o abridor e os resortes antigos, entón pesar a porta[^1] usando dúas básculas de baño estándar.

Este é o único paso máis importante, and it's the one people most often skip. Miden o manantial vello ou buscan un número de peza, supoñendo que a última persoa instalou o correcto. I've seen situations where the previous owner added insulation or even a new layer of wood paneling to a door, engadindo 30 ou 40 quilos de peso. As vellas fontes xa estaban pouco dimensionadas e loitaban. Se só substituílos polo mesmo tamaño, estás preparando para o fracaso. Pesar a porta é a única forma de saber con certeza o que estás a tratar. It removes all the guesswork and is the foundation for a safe repair.

The Weighing Process: A Critical Safety Step

Accuracy here prevents accidents later.

• A seguridade primeiro: Before you do anything, you must disengage the electric garage door opener. Pull the red emergency release cord. A continuación, and this is the most dangerous part, you must carefully unhook the old extension springs while the door is in the UP position. If you are not 100% confident in how to do this safely, stop and call a professional.
• Using Scales: With the springs disconnected, lower the door. Place one bathroom scale under the left edge and one under the right edge. You may need to prop them up on small wood blocks to get them under the door seal.
• The Calculation: Let the door rest fully on the two scales. Add the reading from the left scale to the reading from the right scale. This total is the true weight of your garage door. This is the number you will use to find the correct spring on the size chart.

What Do the Color Codes on Garage Door Springs Mean?

You see a color on your old spring, but what does it actually represent? Just matching the color isn't always enough, especially if the previous spring was incorrect or the door's weight has changed over time.

O código de cores[^2] is a simple industry standard for identifying the lifting power of a spring. Each color corresponds to a specific door weight, usually in 10-pound increments. Por exemplo, a Gold spring is designed to lift 110 libras, while a White spring is for 120 libras.

O código de cores[^2] system was created to make identification fast and easy for professional installers. It's a great system, but it relies on the first principle we just discussed: you have to know the actual weight of the door. I once consulted with a garage door installation company that was having a lot of service callbacks. It turned out their new apprentice was just replacing springs by matching the color of the old one. He wasn't weighing the doors. After we implemented a strict "weigh every door, every time" policy, their callback rate dropped by over 80%. The color is just a label; the weight is the reality.

A Typical Garage Door Spring Color Chart

This chart is for springs used on a standard 7-foot tall garage door.

• O sistema de 10 libras: The colors change for every 10 pounds of door weight. This allows for precise balancing of the door.
• Double Springs: Remember, these ratings are for a pair of springs. A 140-pound door doesn't use one 140-pound spring. It uses two 140-pound rated springs (Verde), un a cada lado, because each spring is only responsible for lifting half of the total door weight.
• Length is Also Key: The standard length for springs on a 7-foot door is 25 polgadas. They are designed to stretch to 42 polgadas. Using a spring that is too long or too short will prevent the door from working correctly, even if the código de cores[^2] is right.

Why Does My 8-Foot Door Need a Different Spring Chart?

You have a taller 8-foot garage door, and you used the standard chart. Now the new springs are overstretched when the door is open, and they don't have enough power to close the door properly.

An 8-foot door requires a longer spring. Because the door is taller, the spring has to stretch a greater distance. A standard 25-inch spring would be stretched beyond its limit. Springs for 8-foot doors are typically 27 inches long and follow a different color chart.

This is a detail that causes a lot of confusion. A customer ordered a pair of 150-pound (Azul) springs from us. A few days later he called, angry because they "weren't strong enough." Despois dunhas cantas preguntas, I asked him to measure the height of his door opening. It was 8 feet tall. He had installed 25-inch springs on an 8-foot door. When the door was fully open, the springs were stretched so far that they had lost their power and were permanently damaged. We sent him the correct 27-inch springs, and the door worked perfectly. It's a reminder that the entire system—door height, cable length, and spring length—has to work together.

Sizing for Taller Doors

The mechanics change with a taller door.

• Increased Travel: Unha porta de 8 pés ten que percorrer un extra 12 inches compared to a 7-foot door. This means the cables attached to the spring also have to travel further.
• Longer Springs Needed: To accommodate this extra travel without being overstretched, the spring itself must be longer. A 27-inch spring is standard for an 8-foot door. It has more coils and is designed for a longer stretch.
• Different Color Chart: Because the spring's physical design is different (more coils, longer wire), o código de cores[^2] ratings also change. A 150-pound spring for an 8-foot door might have a different color than a 150-pound spring for a 7-foot door. You must use a chart that is specifically for 8-foot doors.

Conclusión

A garage door spring size chart is a vital tool, but only when used correctly. Always weigh your door first, then use that weight and your door's height to find the right código de cores[^2].

[^1]: Accurate weighing is the first step in ensuring you select the right spring, eliminating guesswork.
[^2]: The color code helps identify the lifting power of springs, making it easier to select the right one for your door.