Mississippi Administrative Code › Title 19 - Department of Insurance › Part 7 - State Fire Marshal › Chapter 5 - (MH-5) Uniform Standards Code For Factory-Built Homes Law. (10/16/2009) › Rule 19-7-5.06 - Installation Standards For Used Factory-Built Homes › Section 19-7-5.06.9 - Installation Instructions for ABS Pads

Current through June 25, 2024
A. The purpose of
				  this section is to emphasize that
the ground under the ABS pads must be
				  leveled, evenly compacted, and cleared of all vegetation and debris before the
				  placement of the pad and all pads are to be installed flat side down, ribbed
				  side up.
B. Note that if
				  the pad deflects more than 5/8 of an inch when installed, pier spacing is
				  incorrect for the existing soil conditions. The maximum deflection in a single
				  pad is 5/8 of an inch measured from the highest point to the lowest point of
				  the top.
C. Installation
				  Instructions for ABS Pads B 26X 26 Inch Pad Configuration:
1. All pads are to be installed flat side
				  down, ribbed side up.
2. The
				  ground under the pads should be leveled as smooth as possible with all
				  vegetation removed. Pads are not to be placed on natural grade unless otherwise
				  permitted by the local building authority.
3. Pier and pad spacing will be determined by
				  the Factory-Built home manufacturer's written set up instructions. In the
				  absences of home manufacturer's written set up instructions and written set up
				  instructions from the pad manufacturer, the pier and pad spacing shall be no
				  greater than 6 ft. apart for Wind Zone I areas and no greater than 4 ft. for
				  Wind Zone II areas.
4. The open
				  cells between the ribbings on the upper side of the pads may be filled with
				  soil or sand after installation to prevent any accumulation of stagnant water
				  in the pads.
5. A pocket
				  penetrometer may be used to determine the actual soil bearing value. If soil
				  testing equipment is not available, as mentioned earlier in the Regulation that
				  an assumed soil bearing capacity value of 1000 lbs./square foot (psf) may be
				  used.
6. All pad sizes shown are
				  nominal dimensions and may vary to 1/8 of an inch.
7. The maximum deflection in a single pad is
				  5/8 of an inch measured from the highest point to the lowest point of the top
				  face. (Please review Table V and Figures 6 and 7).
TABLE V - SIZE AND LOAD
PAD SIZE
PAD AREA
1000 LB.SOIL
2000 LB.SOIL
3000 LB.SOIL
16" X 16"
256 sq. in.
1,780 lbs.
3,560 lbs.
5,333 lbs.
18.5" X 18.5"
342 sq. in.
2,375 lbs.
4,750 lbs.
7,125 lbs.
20" X 20"
400 sq. in.
2,750 lbs.
5,500 lbs.
8,250 lbs.
a. Any
				  configuration above may be used to replace a home manufacturer's recommended
				  concrete or wood base pad.
b. The
				  maximum load at any intermediate solid value may be determined as the average
				  of the next lower and next higher soil values given in the above table.
c. Pad sizes shown are nominal
				  dimensions and may vary up to 1/8 inch.
d. Pad loads are the same when using single
				  stack or double stack blocks.
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					 Here To View Image
Figure 6. ABS pad assembly installation instructions
					 for a 26"x 26" configuration
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Figure 7. Maximum allowable deflection in a single
					 ABS pad