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.
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.
We are a family owned and operated company with local offices in various cities. We have offices in Arizona — from Phoenix to Tucson; Nevada— covering the entire Las Vegas metropolitan area, from North Las Vegas to Henderson; the Sunflower State of Kansas, from Wichita to Junction City; Wisconsin — spanning the entire Milwaukee county, from Fox Point to South Milwaukee; and Michigan, with our base in Sterling Heights.
The Decko 24300’s 3/4-HP motor provides the power you need if you've got a big or heavy door and, while it may not have all the bells and whistles of some “deluxe” models, the Decko does everything you need it to do. We appreciate the fact that this model comes with two remotes, an internal panel for controlling the lighting and opening/closing the door, a wireless external keypad with a security code, and a rolling code access system that keeps intruders out of your garage. The Decko will save you a few dollars over some of the more premium garage door openers, but it will still give you an excellent performance.
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.
These springs weighed in at just over 9 pounds each, including the winding cones. They are covered with a light film of oil, and at this point the job starts to get messy. The manufacturer has painted them with a "225B24" part number, which no doubt indicates the 0.2253 inch wire size, 24 inches long. Perhaps the "B" indicates the 2-inch inside diameter. Both the left- and right-hand springs have this same number on them.
Garage door openers make it easy to get your garage open without the struggle or the hassle of facing inclement weather. The latest garage door openers have new features such as timed close, battery backup and improved energy efficiency. Sears carries top-of-the-line garage openers that can run much more quietly and smoothly than old models. With a keypad feature, you'll be able to get into your house using a secure four-digit code. With a few new batteries in your remote, you'll be opening your garage with the push of a button.
Resetting the drums, if needed: If the drums were incorrectly set in their old positions, one must reset both drums in new positions on the shaft. This is complicated by the presence of old dimples in the torsion shaft from previous setting(s), which must be avoided lest they improperly influence the new setting of the drums. To begin this process of resetting the drums, the door must first be lowered and resting level on the floor, the spring(s) must be in the unwound condition with their set-screws loosened, and the lift cables wrapped around the drums. If for some reason the door does not rest level on the floor, such as the floor being uneven, then insert temporary shims between the door bottom and the floor to bring the door up to level. Loosen the set-screws on the drums, and turn the torsion shaft to avoid the old dimples from the set-screws in the old drum position. Tighten the set-screw on the left drum (that is, on your left as you face the door from in the garage), creating a new dimple, and apply tension to its cable with the locking-pliers technique, enough tension to keep the cable taut but not enough to start to move the door up. Attach and wind the cable on the opposite (right) drum by hand until the cable is similarly taut, and set the screw, remembering that tightening the screw will tend to add a bit of extra tension to the cable. Both drums should now be fixed on the torsion shaft, with the cables about equally taut (listen to the sound when you pluck them like a guitar string) and the door still level on the ground. Setting the left drum first, and the right drum second, will allow you to take up any slack in the cable introduced by the left drum rotating slightly with respect to the torsion shaft as you tighten the set screws. This alignment and balance of the cables, drums, and door is critical to smooth operation and proper closing. If you have a single-spring assembly, the distance along the torsion tube from the spring cone to one drum is longer than to the other drum, which allows a bit more twist to one side than the other, and you may have to compensate with the setting of the drums.
The inside of the door panels bear a few dings, since filled with Bondo, from my teenage boys shooting hockey pucks. The streaks on the right that look like dinosaur claw scratches came from operating the door inadvertently when the rear doors of a van were open. The responsibility for these scars is all mine; they have also been Bondo-filled. We tend to use a lot of Bondo around our house. The crud on the walls and ceiling are cobwebs and dust infiltrates.
Reduce your monthly energy bill with insulated garage doors. They feature an insulated core made of polystyrene that’s surrounded by a steel cover. This can help you maintain the temperature inside your home no matter if it’s extremely hot or cold outdoors. Insulated garage doors are also known for their quiet operation. Be sure to look at the insulation rating – or R-value – when considering garage doors. The higher the R-value, the better the insulation.
We also Specialize in frayed and broken garage door cables. Our expert technicians arrive equipped with fully stocked trucks, ready to repair or replace any garage door and opener system. Systems serviced include Liftmaster, Chamberlin, Sears, Craftsman, Genie, Clopay, Wayne Dalton, Amarr, Reliabilt, Raynor,C.H.I, and more. If the door system is unable to be repaired including Wayne Dalton torqmaster setups and needs to be replaced, our technicians are able to upgrade the garage door system with extension or torsion garage door spring systems on the spot.
You might be thinking: Aha! Why don't we lift the door, clamp it in place, and install the springs while they are thus safely unwound, rather than deal with all that accumulation of hazardous torque? The answer: At the top-of-travel, the unwound springs are not fully relaxed; they are still clamped to the torsion shaft with a significant stretch along the shaft axis, plus about a half-turn to keep the door snug at the top. This extra length amounts to the stacking of extra turns that accumulate from winding, also termed "spring growth" in the business. In my case this is about 7 turns of 0.2253 wire, or about 2 inches. Stretching the spring that much and clamping it with a half-turn or so of twist is not feasible.

The deluxe-model upsell trick: Don't you want the best? Don't you want to protect your family? Galvanized springs may be offered to you at extra expense as "longer lasting". Although bare springs (also called "oil tempered") can develop a light film of rust, the eventual failure is due to fatigue and not corrosion. The use of coated springs (whether galvanized, painted, powder-coated, or surface-converted) is mostly about appearance: the customer likes his new door to look shiny, and the customer doesn't like repair parts that show superficial rust from storage.
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.
A knowledgeable installer with good inventory can offer you upgraded spring lifetimes by using longer, heavier springs than were originally installed. For example, you may be offered more expensive springs with expected lifetimes of 15, 25, or even 100 thousand cycles, instead of the standard 10 thousand. The difference in labor to substitute this upgrade is nil. Since the dealer's cost of springs is proportional to weight, and typically a small part of the job price anyway, the dealer's cost for this upgrade is slight. This would seem to be a excellent option to offer every customer, and if correctly calculated and reasonably priced, one that you should take as cost-effective. Yet you may not be offered such an upgrade, if the installer is not adept at making the rather simple calculations, or if the optional springs are not on his truck, or if you're not around to be asked, or if the installer just doesn't like selling or taking time to discuss such details.
You depend on your garage doors to provide safety and security at your home or office. They are also great for enhancing your property’s curb appeal and increasing its value. With their many moving parts and how they operate, you must have access to a reliable service company when something goes wrong. Houston residents and businesses trust us to make sure their garage doors will work when they need it to.
Spring rate, torque, and lift: The spring rate K for these measurements is π*28.5*10^6 * (0.273)^4 / (32 * 140 * 1.72) = 64.5 IPPT. Applying 7.5 turns on this rate will yield a torque of 7.5 * 64.5 = 484 in-lb, which on the 4-inch drums (2-inch radius) yields a lift of (484 in*lbs)/(2 in) = 242 lbs. Again we find good agreement with the approximate door weight of 238 lbs.
There are such a large number of varied issues with carport entryway repair. Stray pieces will be the dependable wind up being free with time. A bothering sound when you work the entryway opener is a marker that there is an isolated wandering part. Prior to an opening, it ensures that that the power supply is standing alone from the framework, or else you may hurt yourself. Now and again the gaps for stray pieces can expand the extent of to a degree that you can’t fix them. In such a case, you can employ wood fillers or perhaps regular wood pieces to top them off.
At this point I weighed the unlifted door to confirm and fine-tune my calculations. This is not strictly necessary, but it makes the adjustments easier to perform, if you happen to have a scale with the requisite capacity. With some helpers, we first lifted the door a few inches and rested it on blocks of wood to provide clearance underneath. Then I slid a 400-pound-capacity freight scale under the center of the door, we lifted again to remove the blocks, and lowered the door gently onto the scale. This door weighed in at 238 pounds, which is very heavy for a single-car door. Since the outside of the door carries the 3/4-inch plywood paneling to match the house, and that plywood weighs about 2 lbs/sq-ft, I estimate the door weight to be about 7 x 10 x 2 = 140 lbs of paneling with the rest 238 - 140 = 98 lbs the interior panels, hardware, and cobwebs. Knowing this total weight will help later in adjusting the torsion on the springs. After weighing, we removed the scale and blocks, leaving the door fully lowered again. Had I not had a high-capacity freight scale, I might have improvised a crude weighing device from levers and smaller weights of known mass, or a lever arm pressing a reduced proportion of the full weight onto a lower-capacity scale. Another factor to remember is that The weight of a wood door can vary with humidity.
What is a battery backup? During a power outage, a battery backup allows your garage door opener to keep working. This is especially important when a wildfire is blazing. During the infamous California wildfires, many people were getting trapped in their garages. Several even died. California state Senator Bill Dodd was among those unable to get out, since he could not manually open his heavy wooden garage door. Drawing on his personal experience, Senator Dodd introduced a bill to make battery backups mandatory in the state of California. On August 16, 2018 the Garage Door Safety Bill passed with wide bipartisan support. As Cheryl Diehm, a Santa Rosa resident who testified before lawmakers, put it, "Make no mistake -- this legislation will help save lives."
Center and level the first section after you install the brackets. The door must be level even if the floor isn’t, so use shims under the section to level it. The rubber gasket on the bottom section will fill the gaps created by an unlevel floor. To hold the level in place, tape it to the section. To hold the section in place, lightly toenail a 16d nail into the frame and bend it over the section. Add brackets and rollers before setting them in place and stack one section on top of another, toenailing as you go up.
I repeat my caution about the uncertainty of interpreting color codes. A professional installer reading this page emailed me to say that the red color indicates the springs are right-hand windings, not the DASMA color code for the wire size. But this photo shows both a right- and a left-hand spring, and both have the red paint on the cones and set-screws. I conclude it is prudent to make your own measurements and analysis. Do not rely on the colors on old installations. The only time I would respect them would be on new parts that carried documentation giving the code.
Once the springs are torqued, the setscrews tightened, and the locking pliers and winding rods removed, do not play with turning the torsion bar using the winding rods. Doing so even momentarily can relieve the tension on the lift cables, which then easily slip off the drums. Replacing the cables on the drums can be difficult without repeating the entire spring unwinding-winding procedure again, and the cables can be damaged if tension is applied while they are off the drums.
End treatments: Torsion springs also are made in a variety of end treatments. The "standard torsion end" is most common, as is pictured in my examples, consisting simply of a short, straight length of wire projecting tangentially. Various non-standard end treatments have longer "ears", U-turns, ends bent in toward the center or along the axis, or even loops. Non-standard ends are used in end fasteners peculiar to various manufacturers, which would seem to serve mostly as a guarantee that you buy overpriced replacements from that one source.
The "liability" angle: The flip side of "safety issue" is "liability". This is not used to directly sell you something; it is used to demean the cheaper alternative and prod you into buying a more expensive (and profitable) option. For example, you may be pressured into buying a whole new door, when you just need a new spring, by the salesman telling you he can't just replace the spring due to "liability" issues. Since product liability is a big burden on the garage door industry, and so many old doors (and especially automatic openers) are dangerous, this may be a genuine reason to accept a higher price.

The second stage of the wireless garage door opener system solved the opening-the-neighbor's-garage-door problem. The remote controls on these systems transmitted a digital code, and the receiver in the garage responded only to that code. The codes were typically set by eight to twelve DIP switches on the receiver and transmitter, so they allowed for 28 = 256 to 212 = 4,096 different codes. As long as neighbors used different codes, they would not open each other's garage doors. The intent of these systems was to avoid interference with nearby garage doors; the systems were not designed with security in mind. Intruders were able to defeat the security of these systems and gain entry to the garage and the house. The number of codes was small enough that even an unsophisticated intruder with a compatible remote control transmitter could just start transmitting all possible codes until he found one that opened the door. More sophisticated intruders could acquire a black box master key that automatically transmitted every possible code in a short time. An even more sophisticated method is known as a replay attack. The attacker would use a code grabber, which has a receiver that captures the remote's digital code and can retransmit that digital code at a later time. The attacker with a code grabber would wait nearby for the homeowner to use his remote, capture the code, and then replay the code to open the door when the homeowner was gone. Multicode openers became unpopular in areas where security was important, but due to their ease of programming, such openers are often used to operate such things as the gates in gated apartment complexes.


Roberto was very courteous and explained the details of what he was doing. He also pointed out a repair I might consider having done (replacement of the bottom panel of my door) and asked the office to follow up with me on this. Someone did follow up with me and since replacement of the bottom panel is not an option and I would have to replace the door, I decided that I can wait.

It’s important to pick a door that suits the style of your house. If you live in a Craftsman bungalow, for example, you might want something that looks like the swing-out doors found on garages behind early Craftsman houses. Manufacturers of modern roll-up doors make them in styles that mimic the old swing doors, complete with faux strap hinges on the sides and a pair of handles flanking a deep groove in the center. 

Garage Doors & More of the Piedmont has been serving the Charlotte Metro area since 2001. At last count, we have serviced nearly 30,000 residential homes in the Charlotte area. Our commercial department also has nearly 1,000 customers. We have been so successful because of our goal to provide the best prices and service available. See our special offers page to see our most popular offers coupon offers.
The right side of the photo shows the center bearing plate where the stationary cones attach with two bolts. Some doors may have only one spring rather than two equal ones as shown here (indeed, old marks on the shaft show that this door originally had one spring about twice as long on one side). Above the center bearing plate is the bracket and track from the electric opener.
The garage door repair should be done right the first time which is why J&S Overhead Garage Door Service uses custom high-cycle garage torsion springs. These extended life garage door springs generally last up to 5x longer than standard garage spring replacements. We include a lifetime parts and labor warranty on torsion spring replacements because we know they won’ t break, EVER. In fact this is what sets us apart from the competition. Using the highest quality parts available allows for safe, long term continuous use of your garage door without return service calls, saving you money.
Tools in Action says the Ryobi Ultra Quiet has plenty of versatility, as you can plug devices into the opener hardware, like a Bluetooth speaker, a fan, or even an 18V Ryobi cordless tool battery. When the opener has power, it will charge the battery. But if your home ever loses power, the 18V battery works as a backup to the garage door opener, allowing it to operate normally.

If your door feels heavy, it is likely that your springs have started to wear down and are no longer capable of bearing the weight that they once did. Now, don’t worry, just because a spring is starting to lose its strength doesn’t mean it will snap at any moment. However, simultaneously, a weak spring isn’t any safer to try and repair on your own.
The gentleman who showed up to my door was kind and very respectful. Introduced himself < Jeremy> and very professionally. He did an outstanding job and took time to let me know each step that was needed. Personally I would give Precision and the gentleman who came a big rating of a 10++++++ Thank you Precision and I would recommend your company to anyone.. A very pleased customer ... ..

Garage door springs come in two styles: torsion (see above), which mounts on the header above the door, and extension (Photo 1), which floats above the upper roller track. In the past, extension springs were safer to install but didn’t have containment cables running through the center of the spring. Without cable, these springs become dangerous, heavy whips when they break. They also tend to be noisier than torsion springs, and we recommend you use them only if you don’t have the 12 in. of headroom above the door that a torsion spring requires.

In the United States, the Consumer Product Safety Improvement Act of 1990 required that automatic residential garage door operators manufactured on or after 1 January 1991 conform to the entrapment protection requirements of the 1988 version of ANSI/UL standard 325.[11] A requirement for redundant entrapment-prevention devices was added in 1993; such a system can use an electric eye, a door edge sensor, or any other device that provides equivalent protection by reversing the travel of the closing door if an object is detected in its path. [12][13]


The Chamberlain Whisper Drive takes control to a higher level than other models with its door and light automation features. The internal control panel has a sensor for motion-activated lighting. In addition, door closing can be instant or set automatically for 1, 5 or 10 minutes. We give this feature a top-notch rating because, should you forget to close your door, your garage will secure itself.
Because your garage door can be customized, pricing varies. Our Clopay configurator will help you review pricing as you begin your project. You’ll start with your door size and whether you need a single or double car door. Next, you can choose the collection of door, which gives you options of various materials and styles. Then, you’ll choose your construction, which allows you to decide what you need in terms of energy efficiency, durability and noise control. Lastly, you will be able to visualize the design and see an end price. Other optional add-ons include windows, decorative hardware, smart features and the r-value. However, you do not have to use the configurator. We also install standard garage doors that have not been customized so you know the product price early on in the process.
Smart garage door openers aren't as expensive or hard to find as you might think. In fact, no matter what smart home platform you're using, there is an opener that will work for you. Smart garage door controllers add convenience like remote access, voice control, scheduling and vehicle detection to your garage door. You'll never need to wonder if you left it open ever again. 

Garage door manufacturers typically produce garage doors fitted with torsion springs that provide a minimum of 10,000 to 15,000 cycles and are guaranteed for three to seven years. One cycle is a single opening and closing sequence. Most manufacturers offer a 30,000 cycle spring. However, it is important to remember that if the weight of the garage door is increased by adding glass, additional insulation, or even several coats of paint, the life of the torsion spring may be greatly reduced. Additionally, springs at highly humid environments, such as coastal regions tend to have a significantly shorter cycle life, due to the corrosive cracking.

(The Wahl correction factor accounts for additional stress in the material due to shear forces, although these forces do not contribute to the spring's torque. These shear forces become significant in designs using a low spring index, which is to say, a relatively thick wire for the coil diameter. The correction factor is applied to scale up the stress S to better predict the fatigue lifetime of the spring.)


Weight and cost: The 24-inch-long spring has a calculated weight of 8.4 lbs, not counting the winding cones. At less than $1/lb wholesale, and $3/lb retail for fabricated steel products, this spring should sell for about $8 to $25 (2005 prices) each, depending on the market and source. Since a pair is required, the expected cost for a pair is $16 to $50.

Loosening or tightening the set-screws is the moment of most risk, since the end-wrench is a potential missile if you slip, and your hand is close to the cone. When the wrench is removed and only the rods are in place, it would seem that the worst that could happen is that the rod is flung out and the captive spring and cone rattle around, assuming you are keeping yourself clear of the rod's radial disk of rotation, and not leaning on the rod such as to fall into the apparatus were the rod to slip out of your grasp. The torsion shaft design has the virtue of capturing the mass of the spring and cones reliably on the shaft, preventing these parts from launching themselves as projectiles, even in an accident.
Most electric garage door openers have two lights: one in front of the opener and one behind or sometimes they sit side by side. They should provide enough light for you to get into your home from your car. Generally, people don’t leave the garage light on when it’s not in use, so it’s nice to have a temporary light when you arrive home. The length of time the light stays on varies according to how it is programmed. In most instances, you don’t need more than a few minutes from the time you leave the car to when you enter your home.
The "liability" angle: The flip side of "safety issue" is "liability". This is not used to directly sell you something; it is used to demean the cheaper alternative and prod you into buying a more expensive (and profitable) option. For example, you may be pressured into buying a whole new door, when you just need a new spring, by the salesman telling you he can't just replace the spring due to "liability" issues. Since product liability is a big burden on the garage door industry, and so many old doors (and especially automatic openers) are dangerous, this may be a genuine reason to accept a higher price.

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).

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