Guide: Commercial Garage Door Installation

Commercial Garage Door Installation Blog Image

In this guide, we will be going over how to install a commercial garage door. We are confident that this will help you refine your skills as an installer and provide better service for your customers.

Assembly Steps

Installing Door:

  • Place nails every 6-8 inches apart on the doorstop. Follow the manufacturer’s recommendations for spacing.
  • Adhere the doorstop to the top of the frame and then repeat for each side. Next, attach the cable failure devices.

Garage door technician prepping the commercial garage door for install.


  • Start prepping your panels. Attach all hinges and brackets to all your panels except for the top. Struts may be required for the door. Review the manual to see if, how many and where they are needed. These add additional reinforcement to the panels.
  • Make sure the struts are centered properly before fastening it to the panel. Start stacking the door panels at the bottom and work your way up.

Remember: Make sure to check that each panel is level and adjust for any unbalanced spots.

  • Now you need to temporarily secure the panels. Toenail nails to hold the panels upright and repeat the process all the way up but leave the top panel off for now. Once the panels have been stacked, make sure the door aligns with the opening.

Garage Door Rollers & Installing cable.


  • Insert the rollers into the end hinges, then run the cable behind the rollers starting from the bottom bracket all the way to the top of the door. Align the vertical track to its correct position, then install the vertical track making sure both sides are secure to the door frame.
  • Once the track has been installed, take out the toenails that were holding the panels up. Open the hinges up and fasten the hinges to the panel above. Do this for all of the middle level panels.
  • Loosely secure the horizontal track to the vertical track and the flag bracket.
  • Once both horizontal tracks have been aligned, securely tighten all fasteners.

Remember: Make sure to keep in mind the radius of the track when securing the horizontal to the vertical.

Pro Tip: Use vice grips to secure the tube shaft so it won’t spin or slip out of place.

Counterbalance Assembly:

  • Take the shaft and place a center bearing plate in the middle. Then slide you springs on either side. Finish both sides with the appropriate drum and end-bearing plate.
  • Lift the counterbalance above the door and attach it to the door frame and the horizontal angle on both sides. Make sure the counterbalance is level, then attach the center bearing plate to the door’s header. Finish this by bolting the springs to the center bearing plate.
  • Thread the cable behind the top roller and fasten it to the drum at the cable attachment point. To remove any slack, wrap the cable around the drum then attach the drum to the tube shaft using the set screws.

Installing the cone of a garage door image.

  • Install the final panel by setting in the roller and tightening the bolts. Make sure the panel has a firm seal against the door opening. Finish by securing the hinges to the top panel.
  • Using the winding bars, wind the spring to the pre-determined amount. Make sure to keep your head and body out of the path of the winding bars. To keep from binding, stretch the springs before screwing the set screws. Then tighten those screws on the cone to manufacturer’s recommendation. Repeat the process for all additional springs.

Garage for technician using 2 winding bars to properly and safely wind a garage door torsion spring.

  • Open the door manually about halfway and lock vice grips on the track. This will prevent the door from going to far up or down. If the springs are the correct specifications and wound properly, the door should stay balanced on its own.
  • Now, we will back hang the track. For this procedure, measure the space for the perforated angle to determine the length needed to attach it to the ceiling. Then secure this part of the perforated angle to the ceiling support.
  • Measure the length of angle needed to make a triangle shaped support. This will help prevent any horizontal or vertical movement.
  • Secure the first piece of angle going straight up from the horizontal track to the angle attached to the ceiling. Try and keep the horizontal track as level as possible.
  • To complete the triangle support, attach the last piece of angle to the vertical support and the ceiling support. Repeat these steps for the opposite side.

You have successfully installed the commercial garage door! We recommend once again, to open the door halfway to make sure that the door is balanced.

To watch the full video, along with other helpful videos, be sure to check out all our Solutions Education courses.

Are you signed up for Solutions Education? All courses are free to garage door dealers and installers. Invite your employees to follow this guide.

(*Must be a registered company of SSC to access the above registrations – Register Here)

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Safety Disclaimer: In order to see all procedures completely, there may be safety measures that are not taken by our actors. Be sure to follow any and all proper safety requirements and refer to your manufacturer’s installation manual for details. Your health and safety is the #1 concern. Failure to understand/follow the recommendations in the course could result in property damage, personal injury or death. While all efforts are made to provide accurate information and guidance, it is impossible to predict all door circumstances. Accordingly, the user agrees that the user of this video; products and information contained herein are at your own risk. In no event shall Service Spring be liable for any property damage, personal injury/death, or any other loss or damage that may result from your use of the information and products provided on this video. All information contained within this site is provided “as-is” without warranty expressed or implied. User assumes all responsibility/risk for use of information and products purchased. If you have any doubts about your ability to perform the work safely, we recommend you contact another door professional to complete your repair.