19 Miss. Code. R. 7-5.06.5 - Soil Type/Bearing Capacity

Under the Federal Standards, manufacturers are only required to provide one acceptable method for installing the home. However, manufacturers usually provide installation instructions that can be applied to a number of sites. These "generic" instructions commonly specify a minimum acceptable bearing capacity of the soil. Additionally, the manufacturer may offer options for acceptable footing sizes based on the bearing capacity of the soil. Installer/transporters and inspection personnel should first determine the bearing capacity of the soil in order to determine the proper size footing or foundation. Different soil types will have different bearing and holding capacities. The bearing capacity of the soil is the load per unit area that can be supported safely by the ground. The performance of the ground anchor is also related to the soil's holding capacity. In the absence of borings, test pits, and other soil investigations that provide information on the proposed site, the following description of soil types in Table II may be used for homes installed in Mississippi.

TABLE II - BEARING CAPACITY/SOIL TYPE*

Bearing Capacity psf	Bearing Capacity kg/m2	Soil Type
2000	9765	Loose sand clay soils or medium soft clay
3000	14647	Firm or stiff clay
4000	19530	Loose fine sand or compact inorganic silt soils
6000	29295	Compact sand clay soils
8000	39059	Loose coarse to medium compact fine sand

*Note: The above table may be used if the soil characteristics are known. If the soil type is unknown, the following resources may be consulted to determine the soil type/bearing capacity:

(a) LAHJ;

(b) Soil conservation district;

(c) United Sates Geological Survey;

(d) The Resource Conservation Agency of the U. S. Department of Agriculture;

(e) Highway Department;

(f) Qualified Professional Engineer; and/or

(g) Other methods approved by the Commissioner.

In lieu of determining the soil bearing capacity by the use of the methods described above, an allowable bearing capacity of 2000 psf may be used unless the site-specific information requires the use of lower values based on soil classification and soil type.

Notes

19 Miss. Code. R. 7-5.06.5

Miss. Code Ann. §§ 75-49-1, et seq.; 75-49-11 (Supp. 2015).

Adopted 1/1/2015 Amended 10/1/2016