MOBILE HOME PILLARS, PIERS, PADS, RUNNERS AND TIE …

MOBILE HOME PILLARS, PIERS, PADS, RUNNERS AND TIE DOWNS

PILLARS:

1.

When available, pillars must be installed according to the manufacturer's instructions

specifying the location and minimum imposed load capacity.

2.

In the absence of the manufacturer's specifications, the installation of mobile homes shall, at

a minimum, comply with the following specifications:

a.

Pillars shall be installed directly under each main frame beam. If the distance between

the main frame beams does not conform to the pad or pillars that are permanently

installed on the mobile home site, cross beams shall be used. These cross beams may

be of steel or pressure-treated wood which resists decay and which has an imposed load

capacity of 3,000 pounds per square foot (PSF). The cross beams shall extend a

minimum of 6 inches beyond each main frame beam, but shall not extend beyond the

sides of the mobile home. A wood beam shall not rest on the ground, but shall rest on the

cap. If the cross beam interferes with a utility to the mobile home, the cross beam

placement may be between blocks. If a cross beam is used between blocks, it shall be a

minimum of 6 inches by 8 inches.

b.

Pillars shall be placed on 10-foot centers along the length of each main frame beam, but

may be placed at less than 10-foot centers. If the pillars interfere with the axle area, they

may be placed to a maximum of 13-foot centers, but the pillar placement shall not be

less in number than if placed on 10-foot centers.

c.

The pillars nearest each end of the mobile home shall be within 3 feet of either end.

d.

Pillars shall be constructed of solid concrete, cored concrete blocks, or a heavy metal

screw column which bears on both frame and foundation or other acceptable design and

construction meeting mobile home industry standards,

e.

Concrete block pillars shall be constructed of regular 8 inch by 8 inch by 16 inch blocks

and placed on the pillar platform. The blocks shall be placed with the open cells vertical

and the blocking of the pillar shall be single tiered. A cap shall be placed on top of the

pillar. A wood plate 1 inch by 8 inches by 16 inches, or 2 inches by 8 inches by 16 inches

may be placed on top of the cap for leveling. Shims may be fitted and driven tight

between the wood plate or cap and the mainframe and shall not take up more than 1

inch of vertical height,

f.

Pillars shall be installed perpendicular to the main frame of the mobile home.

3.

Solid concrete pillars may be of cone or pyramid design with a minimum 16-inch base

tapered to a minimum 9-inch top. Shimming shall be the same as for the concrete block pillar.

4.

All pillars shall have a minimum imposed load capacity of 3,000 pounds.

5.

If the manufacturer's recommended installation specifications, or their equivalent, exceed the

minimum specification stated in these rules, the manufacturer's specifications shall in all

cases be complied with. The burden of reasonable proof of equivalency rests with the

installer/owner.

PIERS:

Piers are to be placed at each location where a pillar would be located. Piers are to be

cement 18 inches in diameter or equivalent and be below the frost line (42 inches) grade.

Cement must be equivalent to 3,000 PSI at 28 days. The top of the piers must be at least 2

inches above grade. The grade must slope away from the piers.

PADS:

Pads are only allowed on soils that are not subject to frost, i.e., well drained soils. Pads must

be at least 5 inch concrete with No. 4 wire mesh the full width and length of the unit.

Cement must be equivalent to 3,000 PSI at 28 days. The top of the pad must be at least 2

inches above grade. The grade must slope away from the pad.

RUNNERS:

Runners are only allowed on soils that are not subject to frost, i.e., well drained soils. Runners

must be at least 30 inches wide by 6 inches thick cement with No. 4 wire the full length of the

unit.

Cement must be equivalent to 3,000 PSI at 28 days. The top of the runners must be at least 2

inches above grade. The grade must slope away from the runners. The runner must be

placed below the blocking area of the unit.

TIE DOWNS:

All mobile homes placed in migrant camps after January 1, 1993, must have tie downs or

anchors. Tie downs must be installed in compliance with the manufacturer's specifications. In

the absence of the manufacturer's specifications, we suggest the owner contact the

manufacturer for the specifications. Tie downs must be anchored to a foundation that extends

below the frost line.

NOTE

TYP. 24' or 28'

WIDE UNIT

1 - CONCRETE SHALL HAVE A MINIMUM

28 DAY COMPRESSION STRENGTH

OF 3000 PSI. TOP OF PIERS SHALL

BE LEVEL AND FORMED TO PREVENT

ANY MUSHROOMING.

TYP

14' or 16'

2 - ACTUAL PIER LOCATIONS

SHALL BE PER. MANUFACTURE'S

RECOMMENDATION FOR INDIVIDUAL

MOBILE HOME.

2"x8"x16"

WOOD BLOCK

FINISH

GRADE

TOP OF PIER

SHALL BE 2'

MIN. ABOVE

FINISH GRADE

42"

TYP.

18"

TYP.

PROFILE VIEW

MARRIAGE LINE

2 COURSES OF

8"x8"x16"

CONC. BLOCKS

PIER (CONC.)

FOOTINGS

SHALL HAVE A

16" DIAMETER

PLAN VIEW

3' MIN.

8'

CONCRETE

PATIO

15'

5'

7.0

23' MIN

TYPICAL SINGLE WIDE LOT

NO SCALE

7'

EDGE OF PAVEMENT

3'

SURFACE

DRAINAGE

45'

10' MIN

47.5' TYPICAL

TO WATER MAIN

8'

7'

3'

TO SEWER MAIN

20'

E

10' MIN

3' CONC. WALK

ELECTRIC & GAS PEDESTAL

10' MIN

TYPICAL PIER FOUNDATION

NO SCALE

3' x 4'

CONC. SERVICE WALK

3000 PSI

8' 6"

8' 6"

8' 6"

10' 0"

13' 6"

8' 6"

4" SANITARY SERVICE

3/4" WATER SERVICE

GAS, ELECTRIC

SERVICE PEDESTAL

5'

6 - 10 1/2 '

1/4" 1 FT

SLOPE

8' 6"

5'

MIN

3000 PSI AT

28 DAYS

3'

8' 6"

14' X 66' MOBILE HOME

(HITCH REMOVED)

6'

4'

2' 6"

LOT LINE

CONCRETE DETAIL

COMPACTED GRANULAR MATERIAL

5" THICK CONC. WITH

NO. 4 WIRE MESH

5'

T

ELECTRIC PEDESTAL; SEE DETAIL THIS SHEET

GAS PEDESTAL

12'

E

10'

E

10'

60' TYP.

8' 0"

DRIVES & PAD RUNNERS

* All concrete used must have a 3,000 psi strength

@28 days curing time.

* Concrete shall be sealed with a curing compound.

* Concrete shall be 6" min. thickness.

* Top of concrete shall be at least 2" above finished

grade.

SIDEWALKS & PATIOS

* All concrete used must have a 3,000 psi strength

@28 days curing time.

* Concrete shall be sealed with a curing compound.

* Concrete shall be 4" min. thickness.

* Top of concrete shall be at least 2" above finished

grade.

15' 0"

30' 0"

T

DRAINAGE

TYPICAL

10' MIN

24' 0"

G

20' 0"

5'

DRIVE

SURFACE

12' 0"

45' 0"

5'

6' 4"

7'

1"

 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download