https://en.wikipedia.org/wiki/Frost_line

The frost line—also known as frost depth or freezing depth—is most commonly the depth to ... Foundations are normally built below the frost depth for this reason . Water and sewage pipes are normally buried below the frost line to prevent them ...

http://answers.angieslist.com/What-frost-line-relevance-building-digging-q140614.aspx

I am basically asking if there is a standard depth you dig when building a foundation for a structure and what does the frost line have to do with ...

https://www.hammerpedia.com/frost-line-map/

This resulted frost heave can be detrimental to footings and foundations. That's why building codes specify structural footings be placed below the frost line.

https://www.engineeringexpress.com/wiki/frost-protection-concrete-footings-grade/

Jan 3, 2017 ... How Building Codes address protecting shallow foundations from ... The frost line can extend anywhere from 5 inches to 6 feet below grade in ...

https://www.decks.com/how-to/264/deck-footing-frost-depth-map

When excavating your deck footings, you'll need to dig below the frost line. ... barrier you may need to dig your foundation much deeper than on a flat surface.

https://www.jlconline.com/how-to/foundations/frost-depth-for-footings_o

Q If I'm building in a heating climate on frost walls, with an uninsulated crawlspace and a dirt floor, how deep do I need to place my footings for the posts  ...

https://www.thespruce.com/foundation-footings-code-basics-1822269

Apr 22, 2019 ... Basic code requirements for foundation footings include site grading; soil load- bearing values; and footing depth, width, and levelness.

https://www.greenbuildingsolutions.org/blog/frost-protected/

Frost-protected shallow foundation design (FPSF) provides cold weather durability without excavation below the frost line. Recently designated a U.S. ...

https://thehonestcarpenter.com/blog/qa-2-frost-line/

Mar 11, 2018 ... shovel in dirt frost line footings ... “footings”—essentially concrete pads that give foundations and posts something solid and stable to sit on.

https://www.homeinnovation.com/~/media/Files/Reports/Revised-Builders-Guide-to-Frost-Protected-Shallow-Foundations.pdf

Frost-Protected Shallow Foundations, 2001, authored and published by the ASCE. ..... the frost depth around a building, thereby allowing foundation depths as ...