Spring repair in Salt Lake City, Utah

At 4,226 feet, Salt Lake City takes 81.8 freeze–thaw crossings a year, and every one of them works the spring steel — contraction, expansion, repeat — whether or not the door moves at all. Usage adds cycles; the climate adds fatigue on its own clock.

Brittleness is the accomplice — cold steel fractures where warm steel bends, which is why the break so often happens on the first morning lift, and why Salt Lake City's calls track its winter: 94% of the year's freezing crossings land between November and March.

This is mature housing — half the homes in Salt Lake City were standing by 1963 — so most garages have replaced springs once or twice already. A never-replaced set here is living on borrowed time well past the local 5–7 years.

Upgrading to 25,000-cycle springs costs $80 to $150 more and roughly multiplies life by 2.5. With 81.8 freeze–thaw cycles a year working on the steel in Salt Lake City, the upgrade turns a 5–7-year spring into one most owners never replace again — one invoice instead of two.

Whatever the rating, it goes on as a pair and it gets sized to the actual door weight. Cut-price undersized springs fail fastest exactly where winters are hardest.

Drive fifteen minutes and the inputs change — South Salt Lake runs 83.2 freeze–thaw cycles and 5–7 years of spring life; North Salt Lake runs 82.9 freeze–thaw cycles and 5–7 years of spring life; and Murray runs 85.9 freeze–thaw cycles and 5–7 years of spring life.

Against that backdrop, Salt Lake City holds 81.8 cycles at 4,226 ft with a 1963 median build year — the specific inputs behind every figure above.