19 Miss. Code. R. 7-5.06.6 - Required Piers and Anchorages

A. All used Factory-Built homes require diagonal ties to restrict the unit from being pushed from the main support piers. These diagonal ties also restrict overturning of the structure. Additional over the top tie downs or vertical side wall tie downs to restrict overturning are required by some Factory-Built home installations. When a used Factory-Built home is relocated (secondary siting) all of the original diagonal and vertical tie downs for the wind zone designation of the home must be reinstalled.

B. Piers or load-bearing supports or devices shall be designed and constructed to evenly distribute the loads. The maximum pier loads are listed in Table III and Table IV. Piers shall be securely attached to each I-beam of the Factory-Built home and shall extend at least six (6) inches from the centerline of the I-beam. Other types of load-bearing supports or devices shall be listed or approved for the use intended.

TABLE III - MAXIMUM PIER LOAD IN POUNDS

Number of Concrete Blocks	Soil Bearing Value	Maximum Allowable Load
1	1,000 lbs./square foot	4,800 lbs.
2	2,000 lbs./square foot & greater	9,600 lbs.

* ABS Pad types include the following:

13 1/4" x 26 1/4" Pad 2.395 square feet ID#4148 4 or

20" x 20" Pad 2.777 square feet ID#1055 7

TABLE IV - MAXIMUM PIER LOAD

Type	Pad Configuration	Pad Area (in square inches)	Soil Bearing Capacity PSF (in pounds)
			000	500	000	500	000	Remarks
1	1-16 x 16 w/1 or w/2 CMUs	256	780	670	560	450	340	Max: 5340 #
2	1-18.5 x 18.5 w/1 CMU	342	375	563	750	598	598	Max: 5600 #
3	1-18.5 x 18.5 w/2 CMUs	342	375	563	750	938	125	Max: 7125 #
4	2-13.13 x 26.13 w/1 CMU	342	375	563	750	938	400	Max: 6400 #
5	1-18.5 x 18.5 w/1 CMU ID# SPA 264-1-1	342	375	563	750	938	125	Max: 7125 #
6	1-20 x 20 w/1 CMU	400	775	167	556	600	600	Max: 5600 #
7	1-20 x 20 w/2 CMUs	400	775	167	556	944	333	Max: 8333 #

All pad sizes shown are nominal dimensions and may vary up to 1/8 inch.

C. Pier foundations shall be installed directly under each I-beam of the Factory-Built home. If the Factory-Built home installation instructions are not available for a used home, piers for single section homes are to be placed under each longitudinal I-beam not to exceed 8 ft. on center spacing for homes that are 14 ft. wide or less and 6 ft. on center for homes that are over 14 ft. wide, in the minimum soil bearing capacity of 2,000 psf. Piers shall be placed no more than two (2) feet and no less than one (1) foot from the end of each I-beam.

Notes

19 Miss. Code. R. 7-5.06.6

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

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