Seed Home 2 Foundation: Difference between revisions
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=Soil Properties= | =Soil Properties= | ||
*What is a typical soil load capcity? [https://www.concretenetwork.com/concrete/footing_fundamentals/why_soils_matter.htm] | *What is a typical soil load capcity? [https://www.concretenetwork.com/concrete/footing_fundamentals/why_soils_matter.htm] | ||
**2000 PSF for clay, 12k PSF for bedrock. | **2000 PSF for clay, 12k PSF for bedrock. '''Just use a penetrometer'''. | ||
**'''Presumptive Loads''' - Utah Code - 1500 psf for clay - [https://up.codes/s/presumptive-load-bearing-values-of-soils] | **'''Presumptive Loads''' - Utah Code - 1500 psf for clay - [https://up.codes/s/presumptive-load-bearing-values-of-soils] | ||
Revision as of 23:58, 12 September 2020
Calculations
- See Seed_Home_v2_Calculations#Foundation
- Calculator - see Deck Load Calculator
Soil Properties
- What is a typical soil load capcity? [1]
- 2000 PSF for clay, 12k PSF for bedrock. Just use a penetrometer.
- Presumptive Loads - Utah Code - 1500 psf for clay - [2]
Helical Pier Properties
Basics for calculation:
- Size of helix can vary - 6-14"
- Number of helices can vary to increase total bearing area. 1-3 helices per section
- Pier shaft can vary - more load capacity. Hollow pier profiles can stand more lateral loads per weight of steel pier.
- Screw force - force limit at a given radius = load bearing capacity, in the limit that we have not stripped out the soil (using a screw thread analogy)
Tools
- Soil penetrometer $56 to measure compressive strength of soil - [3]