Speed of a thrown winding bar:: The springs, being in balance with the door, effectively are able to launch a typical 150 lb door at 10.6 mph speed. An 18-inch long by 1/2-inch diameter steel winding bar happens to weigh about 1 pound. Since momentum is conserved, this 150:1 ratio in weight of the door to the winding bar means the fully-wound springs could potentially throw a winding bar at 10.6 mph * 150 = 1590 mph = 2332 ft/sec, assuming the energy were perfectly coupled and transferred. If the energy transfer were only 1/3 efficient, this would still be the 800 ft/sec speed of a typical pistol bullet. Except it is a foot-and-a-half metal spear, not a bullet.
The low rating on the CS is due to the fact that inwas out of town and my wife called because the garage door wouldn't open. We had repairs to the only other exit, and the CS said because it could be opened manually, it was no emergency. She was stuck in the house for over Sixteen hours. No emergency crew came out. Steve, a tech who came out the first time, fixed the door. It is not his fault CS took their sweet time to help a 45 year customer. I commend Steve. I do NOT have anything good to say about CS.
Overhead Door® openers​ and garage doors are built with longevity in-mind. By performing a few routine tasks, you can help ensure your garage door system stays safe and stands the test of time. One important part of garage door system routine maintenance is to make sure the photo-eyes have not gone out of alignment. The photo-eyes are the infrared sensors which monitor whether the space at the bottom of your garage door is clear. When these sensors are not lined up properly they will keep your door from closing. Make sure to occasionally check your photo-eyes’ alignment to ensure they are correctly detecting obstructions to keep your garage door safe and operating properly.
Wood doors range from midprice to very expensive, depending on whether they consist of a lightweight wooden frame filled with foam insulation and wrapped in a plywood or hardboard skin (the least expensive) or are true frame-and-panel doors made of durable mahogany, redwood, or cedar. Wood doors usually carry a short warranty, perhaps only one year. 
Trading wire size for length, diameter, or cycle life: Now we are really going to save you some money, if you just recall your high school algebra class (and I don't mean that cute cheerleader who sat next to you). If you further understand the role of the 4th power of the spring wire size (letter d in the formulas above) in the numerator of the spring rate formula, and how to increase or decrease d to compensate for changes in length, diameter, and cycle life, then you're qualified for elite spring calculations. Matching springs is a matter of equating the 4th power of the proportion in wire size change to the proportion of change in the diameter or length or the product of both diameter and length. However, it is usually best to only increase wire size when substituting a spring, since this does not derate the cycle life. If you observe that the formula for bending stress is proportionate to the inverse 3rd power of the diameter, then physically a proportionate increase in wire size will result in a dramatic increase in cycle life of the 3rd power of that proportion. Trade-off example: Yawn with me while we ponder my original spring once more. Let's say I was in a fit of engineering mania, and wanted to replace my spring having a 0.2253 inch diameter wire (d = 0.2253) with a 0.262 wire version (d = 0.262). How much longer is the spring with equal torque rate, assuming we use the same coil diameter? The proportion of this change is 0.262/0.2253 = 1.163, and the 4th power of that is 1.83. This means the length must increase by a factor of 1.83 (again, not counting dead coils). Recalling that the length in Example 1 was 102 non-dead coils, the heavier wire spring must be about 1.83*102 = 187 coils, which when adding 5 dead coils and multiplying by the wire size to get the overall length, is (187+5)*0.262 = 50 inches, versus 24 inches in the original. So using this heavier wire more than doubles the length (and thus the mass and thus the cost). While the cost about doubles, the stress goes down by the inverse 3rd power of the wire size proportion, or 1/(1.163**3) = 0.64. Sress is favorably, non-linearly related to cycle lifetime (halving the stress more than doubles the lifetime), so this decreased stress should more than double the expected lifetime of the spring. While the up-front cost is more, the true cost of an amortized lifetime is much less. In short, per cycle it is cheaper. Ah, the wonders of engineering calculations! Conclusion: Observe that the stress formula (and thus the cycle lifetime) depends only on wire diameter (d) for equal torques. Thus the only way to improve cycle lifetime is to use heavier wire. For equal torques, heavier wire size, due to the exponents in the formulas, increases cycle lifetime much faster than it increases mass (and thus cost), physically speaking.
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.
Wood - Wood garage doors are sturdy and quite beautiful. However, if you live in a humid climate, your doors will be prone to rotting and splitting. If your wood is painted, you must also factor in the costs of painting as part of your regular maintenance routine. The cost of repairing the wood varies depending on the type. However, average cost to repair a wood panel is $190 to $215.
Garage doors cause injury and property damage (including expensive damage to the door itself) in several different ways. The most common causes of injury from garage door systems include falling doors, pinch points, improperly adjusted opener force settings and safety eyes, attempts at do-it-yourself repair without the proper knowledge or tools, and uncontrolled release of spring tension (on extension spring systems).

The Certified Technician, Rey Lopez, was competent, professional, polite, and willing to work. He quickly removed the old door and installed the new one. He then explained the vast differences between what we originally had and what we'd just purchased (stronger spring/tension rates; increased viability of door opening/closing life; beefier hardware; plastic vs. nylon rollers; stronger door reinforcement). Ray performed with alacrity his tasks and then demonstrated the quiet, solid way the door retracted--no banging after the initial rise from the ground. Finally, his attention to detail was so precise that he enabled another remote controlling all three doors, plus he capped some frayed wires, thus solving the problem of why the door opened intermittently. I would rate him a "6" on a scale of "1-5", meaning he went above and beyond our expectations. His "can do" attitude, coupled with the deference he showed, will take him a long, long way. May HaShem richly bless him in his endeavors!read more
However, in addition to potentially causing injuries to the under-prepared DIYer, a malfunctioning door can become a safety hazard to you and your family. Keep in mind, according to the National Electronic Injury Surveillance System (NEISS), over 13000 people checked into hospitals with garage related injuries in the United States in 2007. You don’t want to turn a loved one into a statistic just to save a few dollars!
Openers are available with a chain drive, screw drive or belt drive. Chain drives (a long chain pulls the door open and closed) are the least expensive, but they’re loud. Screw drives (a long threaded rod drives a mechanism that opens and closes the door) are priced in the mid- range. They require the least maintenance, but they’re not as quiet as belt drives. Belt drives (a rubber belt opens and closes the door) are the quietest, making them the best choice if you have living space above the garage. They’re also the most expensive.
Most garage door openers include a remote that lets you open and close the door from the comfort and safety of your car. Some garage door openers support Internet connectivity, either as an add-on or built in. This allows you to use an app that lets you open or close the garage door from your smartphone or tablet, and monitor your garage door's status (open or closed) from anywhere that you can connect to the net.

Although you can replace your garage door opener on your own, it’s more difficult than most DIY projects, so following the installation instructions is a must. If you’re not confident you can replace the opener on your own, you should consider hiring a professional, which further increases your costs. You can also expect to pay more if you’re replacing a garage door in addition to the opener.

Two of the spring references specifically for the garage-door industry are the APCO Spring Manual by Bill Eichenberger, and the Torsion Spring Rate Book by Clarence Veigel; these give tables of spring sizes and torque constants. Spring engineering principles in general are described in the Handbook of Spring Design published by the Spring Manufacturer's Institute; the formulas allow you to calculate torque constants knowing only the geometry and the Young's modulus of the material. You can also find some brief spring information in standard references like Machinery's Handbook and Marks' Standard Handbook for Mechanical Engineers.
Next, the torsion shaft is reassembled with the new springs, the drums repositioned loosely on the shaft, this whole assembly slid back into the end bearings, and the drum set-screws tightened down. I tightened the set-screws about 1/2 or 3/4 of a turn after contact with the shaft, which provides a good grip, but does not distort the shaft. The drums can be set on their old positions, if they were correctly installed, which is snug up against the end bearings to remove any longitudinal play in the torsion shaft. Now the lift cable can be reattached to the drums, and a slight temporary torque applied to the shaft to keep the cable taut while the first spring is wound. This temporary torque is conveniently applied with a pair of locking pliers clamped on the shaft, positioned such that they hold the torque by pressing lightly against the wall above the door, before you start the spring winding, The locking pliers stay on the torsion shaft until you have finished the spring winding locked down the spring cone(s) with the setscrew(s), and removed the winding bars. Then you simply remove them with the release on the wrench handle. I feel that any job that doesn't require a trick manipulation with either locking pliers or duct tape (or in the ultimate case, both!) is just too boring. My trusty pliers look a trifle rusty ever since I used them to clamp something on my outdoor TV antenna "temporarily" and left them out in the weather for, oh, several years. The white stuff on the drum is paint overspray from the original painting of the garage interior.

Garage Door Installation – This includes the installation of a new garage door. Includes the door itself, the track, cables, springs, hinges, handles, locks and rollers.  It is the complete service and installation of a new door. We inspect all the parts, make adjustments to fit your garage opening, and service all elements during the installation process. Plus, we check to ensure all parts are in proper working order after installed.


There’s another reason new doors are superior to old ones: energy efficiency. Keep in mind, garage doors are large, and when they open, they let a lot of outside air into your home. While you may have significant insulation separating your garage from the rest of your home, eventually that temperature differential will start to influence your energy bills.
However, in addition to potentially causing injuries to the under-prepared DIYer, a malfunctioning door can become a safety hazard to you and your family. Keep in mind, according to the National Electronic Injury Surveillance System (NEISS), over 13000 people checked into hospitals with garage related injuries in the United States in 2007. You don’t want to turn a loved one into a statistic just to save a few dollars!

Adding a new garage door provides a dramatic difference in your home’s appearance. When neighbors pass by, when guests pull up, or when you return from work, your house will have a distinct beauty that makes it a landmark of the neighborhood. The unique look you’ve always imagined — as well as the material, the finish, and the insulation can be found in our wide selection of garage doors.
Before carrying out any kind of San Antonio garage door repair, we try and understand the problem at the very first place. After being contacted, our professionals will go and visit your garage personally and find out the actual problem. They are the best people to suggest if the problem can be solved with repairs or if the garage door will need a replacement. Usually if the problem is a minor one, it can be tackled with repairs, but in case of grave issues, complete replacement of the doors is recommended.
Michael Davis replaced the tension springs and just about everything else that moves on both of my single car garage doors. I think I paid a premium price ($900) but I also believe I got the quality of service I paid for. Both doors are balanced and glide effortlessly and quietly along the tracks. Michael took the time to inspect and adjust every aspect of the garage door system including the opener (which I installed myself).read more
In the market for overhead garage doors? Browse our selection of Pella garage doors. You'll find many options for single garage doors, double garage doors, insulated garage doors and even roll up garage doors. Lowe’s also carries garage door screens—great for those who love to spend hours in the garage, but don’t want to deal with the bugs and pests that invite themselves in. We also carry garage door hardware, garage door springs, garage door decorative hardware and garage door sensors, and don’t forget to ask about our garage door installation and garage door opener installation. Once you've decided a garage door fits your home, you'll need to find the garage door opener that works best for you. At Lowe’s, we carry Genie garage door openers, Chamberlain garage door openers and SOMMER garage door openers that will work seamlessly with your garage doors. We now offer a garage door opener that's compatible with your Iris home automation system, too. Whether you prefer opening your garage with a garage door remote or garage door keypad, you'll find it at Lowe’s. Our selection of garage remotes includes everything from universal garage door remotes to specific brands like Chamberlain garage door opener remotes and Chamberlain garage door keypads. We also carry backup batteries, nylon garage door rollers, garage door parts, garage door opener parts and rail extensions to make sure your garage door is in good working order. Plus, we even offer garage door installations services, which include garage door spring repair and replacements, and garage door cable repair and replacements. We can also replace your garage door weather seal, also known as garage door threshold seals, and install a new garage door opener battery.
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