There are a number of factors that determine the size of the posts you use on your building. Wall height, building span, wall length, and wind conditions are typical considerations. Attic trusses, or floor joists create loads that may require larger posts, glulams, or closer post spacing.
Post foundation embedment is determined by anticipated wind gusts and frost heave. Our footer size calculator is useful for calculating the hole diameter (an thus footer diameter) and footer thickness for your project.
Extremely cold climates mean deeper pole embedment to keep the post below the point where frost heave occurs.
Soil that consists of clay or silt does not have the load bearing capacity of sandy, gravel and rocky soil.
Without a soil report soil bearing capacity can only be estimated based upon the type of soil present at the jobsite location.
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