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- Sources for Frost Depth Values - Structural engineering general . . .
to frost shall have the thickness of such a layer included in meeting the design frost depth defined in Section 3 2 Undisturbed granular soils or fill material with less than 6% of mass passing a #200 (0 074 mm) mesh sieve in accordance with ASTM D422 and other approved non–frost-susceptible materials shall be considered non–frost-susceptible
- Frost box? - Foundation engineering | Eng-Tips
the depth of frost penetration depends on a lot of things One factor is the presence of water in the soil As that material is at 32 degrees, it gives off heat of fusion That heat release slows down the migration of that freezing front As an extreme of this, take the depth of frost at a lake as compared to soil on land
- Frost Penetration and Movement 3 - Eng-Tips
If the soil is non-frost susceptible (meaning that there is no significant change in volume (i e , water freezing), you can put footings down fairly shallow (I did this in northern Ontario - frost depth was 9 ft (3 m) but the soil supporting structure was clean sand (non-frost susceptible) the water table was below 12 ft (4m)meaning that even
- quot;Top quot; or quot;Bottom quot; of Footing? 5 - Eng-Tips
I agree that "bottom of footing" is the standard in regards to frost depth A note on JAE's comment-I don't agree the 42" footing depth versus an "average" frost depth of 26" is the correct picture of the safety factor The frost depth value to consider is the design depth of frost, which is typically the 30-year maximum value
- Exterior Large Equipment Pad with deep frost depths 7 - Eng-Tips
So, the frost depth say 6 ft specified at local code may occur at outside of insulated SOG, but the frost depth below SOG will be around just one ft I want to add that, if the soil is collapsible ( silty clay with some organics) the ground may settle every year at the end of frost season My suggestion to BSPE90 will be;
- Frost Heave Calculation - Foundation engineering | Eng-Tips
I view frost as an "infinite" force If conditions are right for it to form, it can lift just about anything I don't know of any calculation that will give frost pressure I've seen published values of 10 tsf, but I believe they are based on back-calculating the pressure required to lift a building where frost heave was observed
- Frost Protection for Interior Footings 1 - Eng-Tips
In these cases, what I've seen most commonly is to prepare some depth of the subgrade using non-frost susceptible materials and place 4" - 6" of XPS insulation below the slab Obviously bringing it inside the conditioned space is optimal, but that's expensive for large facilities
- Slab on grade amp; frost heave 1 - Eng-Tips
Constructing a "frost wall" does nothing for the area under the slab if that zone goes below 32 degrees F Concrete is a good conductor of heat out of the area under the slab However, if the contents of the tank are kept above freezing, then you may have no problem, since it keeps the ground below the slab warm
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