S.C. Code Regs. § ch. 79, app A

Current through Register Vol. 48, No. 10, October 25, 2024

Appendix A

Tables

Table 1

Alternate Manufactured Home Foundation Systems (Single or Multi Section Homes)

Alternate Systems	Main Components
Concrete or Concrete Block Load Bearing Perimeter Foundation
1.	Exterior load bearing perimeter foundation on concrete footing.
2.	Wooden structure of home is securely fastened to the load bearing perimeter foundation.
3.	For multi'sectional homes, interior piers, or wall.
Pile/Post Foundation
1.	Wooden, concrete, or steel interior piles or posts with timber or concrete caps.
2.	Perimeter enclosure material of block, brick, permanent wood, or material similar to exterior siding of the home.
Concrete Slab or Continuous Footing Foundations
1.	Concrete slab or continuous interior pier footings.
2.	Perimeter concrete footings.
3.	Frame ties attached to perimeter footings.
4.	Perimeter enclosure material of block, brick, permanent wood, matrial similar to exterior siding of the home.
Piers-Ground Anchors Foundation
1.	Piers composed of formed-in-place concrete, concrete block or steel pedestals on concrete footers or crushed stone.
2.	Steel ground anchors in soil or embedded in concrete deadmen in soil.
3.	Frame times with or without over-the-top ties.
4.	Enclosure material (skirting) to match exterior siding of the home.
Permanent Wood Foundation
1.	Permanent wood blocks or steel interior piers on concrete footers.
2.	Steel ground anchors embedded in soil or embedded in concrete in the soil.
3.	Frame ties with or without over-the-top ties.
4.	Permanent wood perimeter enclosure.

Table 2

Nondesigned Footing Areas for Allowable

Soil Bearing Capacity

Roof Live Load (psf)
South Zone 75 (psf)
Single Section		Multi* Section [FN***]
Width of Units up to	12	14	12	14
and including
(ft.) [FN**]
Tributary Pier	6	8	8	8
Spacing (ft.)
[FN**]
Pier Load (lb.)	2700	3150	3600	4200
[FN**]
Allowable Soil Bearing Capacity	Minimum Required Footing Area (sq. in.)
1000 psf	389	454	518	605
1500 psf	259	302	346	403
2000 psf	194	227	259	302
3000 psf	[FN*]	151	173	202
4000 psf	[FN*]	[FN*]	[FN*]	151
6000 psf	[FN*]	[FN*]	[FN*]	[FN*]
8000 psf	[FN*]	[FN*]	[FN*]	[FN*]
Notes:
(a) Rear cantilever or floor beyond the frame is assumed to be less than 2 feet.
(b) For units wider than the dimensions shown in the above table, an engineering analysis will be needed to determine pier spacing.
(c) Individual supports shall not bear a design load greater than 8,000 lb, 14,000 lb, ultimate.
[FN*] Minimum required footings shall be not less than 144 sq. in. (1 sq. ft.).
All values above 144.0 shown.
[FN**] If unit(s) is supplied with overhanging eaves, see manufacturer's installation instructions.
[FN***] See appropriate column for individual section width selected. Multiple section homes may have concentrated roof support which will require special consideration.

Table 3 A

Number of Ties Required Per Side, for Single Section Manufactured Homes.

Zone I

Length of Home	Vertical Ties	Diagonal Ties
Up to 40'	2	3
40' to 46'	2	4
46' to 49'	2	5
49' to 58'	3	5
58' to 84'	3	6

Table 3 B

Number of Ties Required Per Side, for Single Section Manufactured Homes.

Zone II

Length of Home	Vertical Ties	Diagonal Ties
Up to 46'	2	4
46' to 49'	2	5
49' to 58'	3	5
58' to 70'	3	6
70' to 73'	3	7
73' to 84'	4	7

1. Multi section homes only require diagonal ties. Vertical ties not required.

2. Length of home, as used in tables 3 A and 3 B, excludes draw bar.

3. An alternate method of tie down may be accepted when designed by a registered architect or engineer based on the criteria set forth in the Federal Manufactured Home Construction and Safety Standards.

4. If vertical tie brackets are not installed by the manufacturer, add number of required vertical ties to diagonal requirements.

S.C. Code Regs. ch. 79, app A

Added by State Register Volume 29, Issue No. 2, eff February 25, 2005.