Median year built in Irondale runs around 1980, which puts a large share of the garage doors here right at the handoff point between older torsion-bar hardware and the sectional torsion-spring setups that came after. That matters on a service call because the failure mode is different: a torsion-bar spring failure can bind the whole bar across the width of the door, not just one side, and it takes a different repair approach than a single torsion spring on a modern mounting plate.
Add the cold-moderate climate band this area sits in, and steel sectional doors from that era are also past the point where the original galvanized hardware is holding up. Rollers that were fine for twenty years start pitting, torsion bar end bearings dry out, and the stress finally shows up as a spring break or a cable fray right when the temperature swings hard in either direction.
This isn't a Birmingham-wide pattern evenly - it's sharper in places like Irondale where the housing stock clusters tightly around that 1980 build year rather than spreading across several decades.