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...
I'm looking at a set of structural plans and trying to understand why the exterior footings need to be placed below the frost line, but the interior footings are able to be placed right below the slab on grade with no foundation pier. Is there a construction step that's done to ensure that heave is not an issue for interior footings/slab on grade vs. exterior footings? I know the soil below ...
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...
Generally, frost heave is a concern for foundations located at or above the frost line. The frost line varies by location, but here in the midwest it is about 3' to 4' below grade.
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...
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"...