Heave can vary a lot from year to year depending on moisture conditions and weather. 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 case the soil expands (or rather the moisture freezes and expands within the soil matrix) and dislocates the footing. 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 heavy foundation (while still below the allowable bearing capacity of the soil) eliminate the need to go below the 42.
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. Hi, guys, need help here 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 having inadequate cover (side of wall below grade and laterally over footing) to maintain soils thawed under footing. 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
Hello all, how can i determine the frost line depth for a project in virginia All i can find in the code is in r301.2 which leaves in up to the locality The online version of the code is blank in this section Any help would be appreciated. Frost depth also tends to presume a bit of heated building in the tabulated numbers, so keep that in mind for say, a freezer building, unheated storage, etc. What is the minimum frost depth for foundations for north carolina
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