the.com/frostline
the invisible border where winter decides how deep it can stab your pipes
means The maximum depth below ground at which soil water freezes in a given climate, used to determine how deep foundations and water pipes must be buried to avoid frost damage.
from A transparent English compound of "frost" and "line." "Frost" descends from Old English "forst" or "frost," tied to the verb "freosan," to freeze, with cousins across the Germanic family (German "Frost," Dutch "vorst"). "Line" comes via Old English and Latin "linea," originally a linen thread, hence any drawn or imagined boundary. Joined, they name a line the cold draws underground — a practical term that took root in the vocabulary of builders and engineers rather than poets.
- building code
- Foundations must sink below it or heave
- depth varies
- Inches in Florida, six feet in Minnesota
- grave digging
- It dictates how deep cemeteries must dig
- frost heave
- Freezing soil can lift roads and houses
- plant survival
- Roots below it sleep safe all winter
frostline in alaska — depth where ground remains frozen year-round, averages 1,000+ feet in interior alaska
frostline in siberia — permafrost extends 1,600+ meters deep in yakutia, among earth's deepest
frostline in canada — continuous permafrost zones across northern territories with 300-600 meter depths