If you have torsion springs on a self-storage roll-up door, this page should help you. To learn more about how your torsion spring system works, jump down to our Introduction to Self-Storage Roll-up Door Springs. The rest of this page is dedicated to helping you determine what torsion spring you need for your roll-up door. If you are purchasing springs for a self-storage facility, you may want to consider buying in bulk to save both on spring and shipping costs.
Self-storage roll-up doors operate in a similar manner to steel-rolling door springs. Like a steel rolling door, the curtain on these doors wraps around itself as the door opens. The primary difference, however, is that steel rolling doors are made of interlocking slats, while self-storage roll-up doors are just one piece of steel. While steel rolling doors are typically found in heavier commercial and industrial environments, self-storage rolling doors are common in self-storage facilities.
Some smaller self-storage roll-up doors use only one torsion spring, while most larger doors use two torsion springs. Each torsion spring on the door typically has at least one turn when the door is fully open. This extra tension keeps the door open by restricting the curtain from unrolling off the drums.
As you close the door, each torsion spring winds up even more. This extra tension allows the springs to lift extra weight. The extra weight comes from a greater portion of the curtain hanging off of the drums.
When the door is fully closed, the springs have more turns (and thus tension) on them than at any other point in the door's travel. During the last six to twelve inches of travel, the moment arm (the distance from the center of the shaft to the point where the curtain rolls off the drum) is smaller than at any other time while the door closes.
The extra tension in the springs allows the springs to lift more door weight, namely the weight of the un-rolled portion of the curtain. The smaller moment arm, however, decreases the effective weight of the curtain. As a result, the springs lift extra door weight as the door approaches the floor, but the moment arm stays the same. Many times this causes the door to rise a few inches off the ground when you release the door at the bottom of its travel.
It is very important that you order the proper torsion springs for your self-storage roll-up door. You will need to make several important measurements that must be accurate. If you are not careful when you make these measurements, your self-storage roll-up door may not work as it did before.
Many self-storage roll-up door springs are gapped. If you have gapped springs, make sure that you take the compressed length and that you completely compress the spring when taking the 10- and 20-coil measurements. A gapped spring will allow a card or a dollar bill to slip between the coils without stretching the spring.
You will also need to determine the wind of the spring. This will be either right or left, and it corresponds to the right or left side of the door when you are on the inside.
You also need to verify that your spring has the mini-warehouse ends, as pictured above. These ends come it two styles: in towards the center of the spring or out toward the outside of the spring.
If you want to save money on service calls and time on repairs, replace both springs. If you want to save money on parts, just replace the broken spring.
Once you have measured your spring, enter your information in the form below and click "Go!" Once you have selected the springs that you need and have added them to your shopping cart, continue through the checkout procedure to place your order.
PLEASE NOTE: Because of supply line shortages and manufacturing delays you can expect to wait 8-10 weeks for delivery of springs for self storage doors. If you can wait that long please note that in the comment section of your order. If you cannot wait 8-10 weeks, please do not order the springs.
YES, WE'RE OPEN FOR BUSINESS! Due to the Coronavirus with the Delta and Omicron varations, we have changed our local order pickup policy at our West Chicago location. To pick up an order you will need to order first. The quickest way to do this is through our online shopping cart. There you can select the local pickup option. Or, you can call 630-293-1337 for assistance and to place your order. When ready, we will call you and your parts will be available for pickup in the front entrance on the north side of the building. Longer items will be picked up on the south side loading dock. Please do not arrive until you have been notified that your order is ready.
COVID / DELTA / OMICRON VARIANT UPDATE! NO MASK, NO SERVICE! When picking up parts please wear a mask. If you don't bring one we'll gladly provide one. Please honor the six foot social distancing rule to protect yourself and our employees. Thank you for your patience and understanding as we all navigate this challenge together. More information is available on our blog titled DDM Adjusts to the COVID-19 Coronavirus.
DELAYS AND INFLATION: COVID has interrupted global supply distribution chains resulting in unprecedented delays on incoming door and dock industry products. The result is limited availability of many products, two to three month delays on incoming shipments, and an inflationary rate of over 100% on most of our products, and 200-300% on many of our core products such as springs and cones.
SHIPPING CHANGES: Shipping times are currently not guaranteed, even on next day and second day shipments. Normal transit times do not apply. Shipping prices on items over 10 feet long have tripled in many cases.
SPRING WIRE AND CONE SHORTAGES: We currntly have a good inventory of 2" ID springs and cones. However, due to cone and wire shortages, we currently do not have cones for the residential 1 3/4" and 2 1/4" ID springs. For these sizes many customers are reusing their existing cones. If you need the larger inside diameter springs for commercial doors, there will be a one to two month delay on your order. If you are willing to wait two months for your springs, please note that in the comment section of your order. We deeply regret the hardships this will create for many of our customers.