If you have a broken commercial garage door spring, please let us a licensed, insured and experienced professional take care of it. Commercial garage door springs consist of either linear, duplex, triplex or mixed systems. Linear systems are the most economical ones in which all of the springs fit easily on the shaft. Duplex appears to only have two large springs but really inside of the large spring is a spring in each one that is smaller in diameter. Triplex systems are similar to duplex, but there are more than one springs inside of the large springs. The mixed system is a combination of all three systems hence its name. Whether you need a linear, duplex, triplex or mixed system repair or replacement call us for top notch commercial garage door hardware repair.