Here are the new replacement springs I ordered from a distributor, which I found using a Google search for "garage door supply" (search that phrase now). You certainly won't find these at Home Depot or Lowe's (although last I checked Lowe's does carry the less daunting extension spring replacements). I also have a list of some suppliers at the end of this page.
I obtained my parts, as described on this page, from American Garage Door Supply Inc. (http://www.americandoorsupply.com/) They may have raised their small-order prices or imposed a minimum order since I ordered from them in 2002 at the prices in my essay above. The Web site offers a free catalog by PDF download or mail. Springs in 2005 were priced at $2.25/lb.
In 1992 the United States Consumer Product Safety Commission released new rules for automatic garage door openers. Anything manufactured after 1993 was required to include either an electric eye (a pair of sensors that detect an object obstructing the doorway) or a wall-mounted control button that users hold down in order to close the door entirely. Most manufacturers opted for the electric eye method, sometimes referred to as safety sensors.

Once you’ve decided it’s time to replace your garage door — whether the result of malfunctions or just seeking to modernize your home’s exteriors — you may be wondering how much a garage door replacement costs. While these numbers are often determined by several factors, including the materials and labor involved, on average, a garage door replacement can cost just over $1,000 but could range from about $300 to over $2,000.
Chris was very professional & thorough. He arrived on time & was able to answer all questions that I had. I was extremely satisfied with the quality of the work he performed. I spoke several times on the phone with Mrs. Carol who keep me informed prior to, during, and after the installation of my garage door. She was very professional, easy to talk with and resolved any misunderstanding that I had.
While a new coat of paint can go a long way in improving the look of your garage door, the truth is that door design has come a long way in the years since garages were first installed in homes. Not only are newer doors more in line with current fashion trends, but they are also better sized for today’s cars. A new, contemporary door is a great way to get an immediate boost on the value of your home.
Stress and lifetime: Calculating the maximal stress in the wire is useful for estimating the lifetime. Using the formula above, the bending stress S in the spring wire is 32*238/(π*0.2253^3) = 212 Kpsi. The spring index C is D/d = 2.23 / 0.225 = 9.88. The Wahl correction factor is Kw = (4C-1)/(4C-4) + 0.615/C = 1.15. The Wahl-corrected stress is Kw * S = 1.15 * 212 Kpsi = 244 Kpsi. This predicts about a 10,000-cycle lifetime, which is the standard "cheap spring" configuration originally installed. Note that while this stress is proportional to the torque being applied, it is also in proportion to the inverse third-power of the wire size. Thus slightly heavier wire sizes (and suitably adjusted D and/or L) radically improve the expected cycle lifetime of the spring.
Direct Garage Doors specializes in the supply of residential and commercial garage doors. If you're interested in purchasing a new garage door for your home or business or need to replace or repair your existing garage door, we can help! We can supply you directly from a range of the best residential and commercial products in a variety of styles and colors to enhance any residential or commercial property
The first garage door opener remote controls were simple and consisted of a simple transmitter (the remote) and receiver which controlled the opener mechanism. The transmitter would transmit on a designated frequency; the receiver would listen for the radio signal, then open or close the garage, depending on the door position. The basic concept of this can be traced back to World War II. This type of system was used to detonate remote bombs. While novel at the time, the technology ran its course when garage door openers became popular. While the garage door remote control transmitter is low power and has limited range, its signal can be received by other, nearby, garage door openers. When two neighbors had garage door openers, then opening one garage door might open the neighbor’s garage door as well.
Extension spring systems should always be restrained by a safety cable that runs through the middle of the spring, tying off to a solid point at the rear and front of the horizontal door track. Extension springs represent a hazard to bystanders when a spring, pulley, or cable breaks under tension. Metal parts from extension spring systems can suddenly be launched.
The Genie Chain Drive garage door opener combines The Genie Chain Drive garage door opener combines powerful reliable performance with smooth operation to create a long-lasting and easy-to-install garage door opener. The unit's electronic push-button programming makes installation and setup fast and easy. Complete with accessories the system features a reliable DC motor that delivers quiet smooth operation ...  More + Product Details Close
We are proud of the work we do in Northwestern North Carolina. We love this community and we love serving it. So whether you think you need a small repair or a major overhaul, we want to be the team that helps you increase the value of your home while making it a safer place to live for you and your family. Our professional and friendly sales team are eager to connect with you, so contact us today and find out just how we can ease your concerns and make transform your garage!
Today's garage doors come with those door sensors, and if anything is in the path of the door the sensor detects it and raises the door back to the open position. These precautions are important for families with young children or pets. Even if you don't have a mini me or furry friend running around your yard, it's a good idea to have a garage door that is safe for you, your guests and your belongings. 
The garage door opener traditionally has been a simple device. And it still is for the most part. But as with a lot of household items, technological advances are finding their way into garage door opener hardware. There are quite a few cool features in modern garage door openers, some of which are things you never knew you needed to automate the process of opening and closing a garage door.
We love the fact that you can connect the Chamberlain Whisper Drive with a phone app for long-distance control, as well as the fact that the door will secure itself if you forget to do so. As with any technology, there is a learning curve in which the kinks will need to be worked out. But overall, very few owners have anything bad to say about the Whisper Drive. One smartphone user expressed his satisfaction with the product by saying, “I can check if I've left the garage door open and close it from my office!”
Charlotte, NC is  a bustling market for new homes, business construction and restoring old homes.  Charlotte’s real estate market is booming. Our company has been a part of this growth by installing and repairing over 50,000 garage doors since 2001. In this span of time, we have had no issues with the county inspections office. We have done this by making sure that our clients buy the right doors, and have permits in place, if needed. Keep in mind that we are not general contractors, so we do not supply permits, but we provide the information and resources for you to easily apply for permits if one is needed for your project.

If you are a own a home or a business and you have to make repairs to existing doors or complete a replacement you may not need to apply for permits for these small jobs.  I have provided a link here to the Mecklenburg County permit office. You can use this site to conduct research and to decide if you should apply for a permit for your next project.
This is the electric opener which operates this door. I'm picturing it here because you pull the rope to disconnect the trolley, run the trolley under power to the fully-open position, and then disconnect power before working on the door. Then you should lock the door down with either the security lock or with Vise-Grips or C-clamps. This avoids the door lifting when you don't expect it as you are applying spring adjustments. It you were to foolishly overwind the spring without the door locked down, you could possibly find the door trying to leap up to the raised position when you aren't prepared. That would likely knock your grip off the winding rods, with potentially disastrous results. I like to work under the safety principle that serious accidents should be physically possible only when you make two or more stupid mistakes at the same time.
The Ryobi Ultra-Quiet Garage Door Opener boasts a The Ryobi Ultra-Quiet Garage Door Opener boasts a 2HPs motor giving you faster openings and prolonging motor life. An integrated long-lasting LED light keeps your garage illuminated and ensures you don’t spend time changing out light bulbs. Download the Ryobi Garage Door Opener App to monitor and control your garage ...  More + Product Details Close
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