If you add two struts it will cause your door to be out of balance.
How much does a garage door strut weigh.
A standard 25 steel gauge 8 x 7 residential garage door from unique raynor amarr haas midland doorlink garaga northwest hormann delden clopay midamerica martin overhead c h i wayne dalton and windsor will weigh approximately 75 80 lbs and an insulated will garage door weigh approximatly 85 90 lbs.
If you intend to use a garage door opener to operate your door it is crucial to install a garage door strut on the top panel of the garage door.
If you plan on reinforcing your garage door with extra steel braces you need to plan for weight being added to the door.
Struts weigh about twelve pounds for a 16 door.
Therefore you need a pair of 210 pound springs even though your total door weight is 210 pounds.
Adding a strut to a garage door is adding weight to a garage door with the added weight you may need to adjust or replace the spring s to accommodate for the added weight.
This prevents any bending of the top panel that may be caused by the opener trying to lift the door up.
The strut holds it stiff while the door lifts.
A standard 16 foot strut weighs about 12 15 pounds so the spring will at minimum need to be adjusted and it is not uncommon to have to replace the spring s when a strut is added to the garage door.
It should be noted that since the cable loops around a pulley the lifting force of a 210 pound spring is only 105 pounds as seen by the garage door.
Otherwise the extra weight will shorten the life of your garage door opener.
Two inch struts weigh about 10 ounces per foot.
If you add over 20 pounds of struts to your door we recommend replacing your springs.
Garage door struts for eight and nine foot wide doors can ship by fedex or ups but longer struts will not.