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
Highway culvert settlement (frost heave) | Eng-Tips As a result of installing a centreline culvert in an existing highway the culvert appears to have settled, however from further investigation it was discovered that the moisture in the existing subgrade surrounding the installed culvert has cause frost heaving to occur causing a bump Has
Opinions - Exterior Mat Foundation above Frost Lines - Eng-Tips I am just looking for some opinions on how other engineers deal with exterior mat foundations I have a cooling tower that is about 12 x 10 foot in plan The frost line in our area is 30" I told the contractor to dig a 12x10 foot by 30" deep and pour a 3 foot thick mat I know that sounds
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 - void form thickness design | Eng-Tips Hi all, this may be old to someone but i need your input on frost heave design for my foundation I'm designing an unheated structural slab supported on piles Design depth of frost penetration is 2700mm from soil report I'm going to use Dow ethaform void form but i dont know how to calculate
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
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
when to ignore frost depth? 1 - Eng-Tips This funny common term "frost depth" gets thrown around a lot and at any specific site it may be way off Let's say frost depth means where the temperature can go down to 32 degrees F That doesn't necessarily mean in that zone there will be heaving Three things needed for heaving: Cold below freezing, water and soil with fines in the silt range that tend to expand and take on water when
Frost Depth at Descending Slope | Eng-Tips N Locked Frost Depth Not So Civil Oct 1, 2025 Structural engineering general discussion Replies 8 Views 1K Oct 20, 2025 jerseyshore Question scour and erosion depth theory2code2practice Dec 30, 2025 Structural engineering general discussion Replies 6 Views 349 Jan 5, 2026 jerseyshore Best Practice mono-slope truss connection to CMU wall
Frost Depth - Eng-Tips 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