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
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
Frost depth for turndown slab - Eng-Tips I have virtually an unheated metal shack It will sit on a slab on grade with a turndown Is is necessary for the turndown to bear below the frost depth? In my mind, only unheated bearing foundations should be below the frost depth Even though the shack will put load on the turndown, the
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
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
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
Frost Protection for Interior Footings | Eng-Tips If the building is heated there is no need to frost protect interior footings On the other hand, if the structure is an unheated warehouse, then they should be protected just as exterior footings are Thanks for the response
When to Go Down to the Frost Depth - Eng-Tips I always hear that the footings have to be placed below the frost depth but does that apply to any footing? For a job where the local code indicates frost depth of 42”, all exterior bldg footings are placed at that depth but when it comes to the exterior stairs, they only go down 18” only!! The
Frost heave in saturated gravel below foundation - Eng-Tips Given that the gravel will most likely always be saturated with water at least 30 cm below the surface, what sort of frost heave should I expect? I understand that gravel is typically considered non-frost susceptible, but it seems that water freezing will expand and press up the foundation pier in these circumstances
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"