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  1. "Top" or "Bottom" of Footing? | Eng-Tips

    Apr 5, 2008 · Frost depth always has been and should be to the bottom of the footing. You are trying to avoid a condition where frost occurs in the soil directly under a footing and in which …

  2. Frost Heave Calculation | Eng-Tips

    Jan 10, 2018 · Frost heave can easily be several inches in northern states with frost-susceptible (silty) soils and a shallow water table or just poor drainage. On the other hand, dry, clean, …

  3. Crushed stone size limitation for non-expansive frostfree fill

    Jun 4, 2008 · Hi, Guys, Need help here. I remember there was a thread before, which discusses about the crushed stone size for use as non-expansive frostfree fill. But I...

  4. Drilled Pier Frost Heave | Eng-Tips

    Feb 11, 2025 · Hello, I am currently designing concrete drilled piers, and per the geotech report, the recommendations incur a 1600 psf design stress for potential frost heave. The …

  5. Can foundation weight allow avoidance of frost depth? | Eng-Tips

    Mar 3, 2011 · A contractor is suggesting the use of 1ft deep, very wide concrete slab to support heavy rotating equipment. The local jurisdiction has a required frost depth 42in. Can a very …

  6. Is Frost Depth Always Required? | Eng-Tips

    Dec 21, 2012 · No, frost depth is not always required if what you are supporting can withstand the movement. However, for most pipe racks we have designed we have gone to frost depth. …

  7. sonotube foundation for a slab on grade | Eng-Tips

    Sep 29, 2019 · Would the current system present issues where as a result of frost heave the slab will function more as a beam / footing system since the sonotubes will provide resistance to …

  8. Which soils are most susceptible to frost heaving? | Eng-Tips

    Feb 17, 2007 · However there is still some potential for frost heave, especially of there are variations in the soil. As mentioned in the other thread, would be best to insulate footings …

  9. How to insulate a shallow water line | Eng-Tips

    Oct 6, 2008 · The frost line here is approximately 42" and the water within the sprinkler system will not be flowing unless there is a fire in the building, so we believe that there is a real pottential …

  10. Exterior Equipment Concrete Pad | Eng-Tips

    Feb 26, 2025 · The frost jacking happens due to ice lens formation at the boundary btwn cold enough and not cold enough. I don't know about ice lens formation, but I guess my thinking …