Torsion replaced extension springs
That decade matters more than it sounds like it should. By the early 90s, torsion spring setups mounted above the door were standard on new construction, replacing the side-mounted extension springs common on the city's older blocks. So when a Howard door fails, you're usually looking at a torsion spring that's run its cycle count, not a worn extension spring and the rusted safety cables that often come with it.
