Minimum Specifications for Garage Door JambsIt is recommended that both jamb type hardware and jamb type hardware with track be mounted on wood door jambs which comply with the following minimum specifications:
Safety Containment of Extension SpringsGarage door springs must be equipped with a device capable of restraining the spring (or spring pieces) in the event that it breaks. Usually the springs will include an integral containment device. In the event a spring is not equipped with a containment device, replace the spring with one that is properly equipped.
Spring Design StandardGarage door extension springs are designed for a minimum cycle life of 9,000 cycles. (One cycle is equal to one door opening and one door closure.)
* NOTE: All of the above are required by law in California as stated in section 312.7 of the California Building Code (Part 2, Title 24, California Code of Regulations).