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Can foundation weight allow avoidance of frost depth? | Eng-Tips 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"
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
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
Exterior Large Equipment Pad with deep frost depths | Eng-Tips Frost heave isn't really caused by just the moisture in the soil freezing (and the subsequent small volume increase) It becomes an issue when ice lensing happens This is when a horizontal layer of ice forms and continues to grow in thickness as water is drawn into the freezing layer through capillary action in the soil If you have non-frost susceptible soil (large granular fill), capillary
Drywell Freezing | Eng-Tips First off, that "frost depth" is only a rough idea of what you may have at any particular place Site factors that influence depth of freezing temperatures and the effects are many Moisture content of soil, insulation on top, frost heaving susceptibility, wind, snow depth are involved
Drilled Pier Frost Heave | Eng-Tips 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 recommendations also state that placing friction reducing material can be considered as an alternate option to prevent damage
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?
Sources for Frost Depth Values | Eng-Tips Hello all, this is my first post here so please bear with me Where do you go to find accurate frost depth line values? At my job, we often have to design footers foundations rapidly so as to get them to a costumer for the purposes of an estimate Because everything needs done ASAP, contacting
How to insulate a shallow water line | Eng-Tips 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 for the water within the line to freeze My question is: how can i determine an R-value for the soil above the water line?
Grounding Grid Placement | Eng-Tips Is it necessary to place the Grounding Grid below the frost line of the soil to ensure the resistivity of the soil will remain constant and also to prevent heaving? Thanks in Advance!