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Frost Penetration and Movement | Eng-Tips Frost penetration and frost depth effects are really two different animals As OldestGuy indicated, even in very cold climates, they recognize that footings do not have to go full depth of frost penetration if they are in non-frost susceptible soil
Top or Bottom of Footing? | Eng-Tips 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
Frost line depth | Eng-Tips 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 Heave Calculation | Eng-Tips 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, sand or gravel may freeze without heaving Heave can vary a lot from year to year depending on moisture conditions and weather
Frost box? | Eng-Tips A "Frost box" is probably a term for a variation (enhancement) of the sheet insulation over the pipe, where vertical insulation is placed along the pipe to better protect the pipe contain the heat
Frost protection of fill | Eng-Tips The depth the frost will penetrate below the insulating layer depends on insulating value (thermal conductivity and thickness), initial ground temperature, and of course the air temperature over the freezing period
Frost Protection with ASCE 32 | Eng-Tips And another note, frost depth is usually deeper for cold footings versus heated footings Is the 48" frost depth for cold, unheated footings? Here where I practice in a cold climate, we have 42" frost depth for heated footings but that goes down to 120" completely unheated, or we can typically reduce that to 60" WITH NFS under the footings
Is Frost Depth Always Required? | Eng-Tips 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
Frost depth consideration in existing rock layer | Eng-Tips If I propose to install a strip footing of reinf concrete for live and dead loads such that design allowable soil bearing capacity is 8000 psf do i have to be concerned about the fact that the existing rock layer is above the frost line?