Illinois Administrative Code
Title 77 - PUBLIC HEALTH
Part 870 - MANUFACTURED HOME INSTALLATION CODE
Section 870.220 - Tiedown Installation Requirements
Universal Citation: 77 IL Admin Code ยง 870.220
Current through Register Vol. 48, No. 12, March 22, 2024
a) Equipment. All manufactured homes installed after July 1, 2005 must be installed with equipment approved by the Department.
b) Ties
1) Cable, strapping or other approved
material shall be used for ties.
2)
The ties shall connect from an anchor to the closest I-beam beneath the home.
Ties shall not connect to steel outriggers, unless specifically stated in the
home manufacturer's installation instructions. The angle formed between the tie
and the ground shall be between 40 and 50 degrees. If this angle exceeds 50
degrees when the tie is connected to the nearest I-beam, a tie shall connect
from an anchor to both I-beams of the unit.
3) Ties shall be evenly spaced on each side
of the length of the home with a maximum separation of 12 feet and with the end
ties within 2 feet of each end.
4)
If steel strapping is used, it must be secured around the I-beam using an
approved connecting device. Straps shall go from the anchor to the top of
I-beam unless the home manufacturer's instructions indicate otherwise. Care
shall be exercised to ensure that minimum bending radius is adhered to, so that
the breaking strength of the strapping is not reduced.
5) The ties shall be secured to the I-beam of
the home so that they will not become disconnected if the tension is
loosened.
6) Ties must terminate
with a D-ring, bolt or other tensioning device that will not lower the material
strength below that stated in Section
870.200(a).
7) All cable ends shall be secured with at
least two utility bolt type clamps or other fastening device.
c) Anchors
1) All anchors must be installed to full
depth as specified in the anchor manufacturer's installation
instructions.
2) Stabilizing
devices must be utilized when the load on the ground anchor is not applied in
line with the anchor. Provisions shall be made to minimize the deflection or
slicing through the soil by the anchor rod at ground level. The method of
restricting deflection may be the encasement of the top portion of the anchor
in a concrete collar or by the use of a stabilizer plate.
3) Ground anchors installed in line with the
load of the anchor must be a minimum of 48 inches in length.
d) Frost Heave. The following measures shall be taken for the specific type of installation in order to prevent frost heave, which can cause damage to a home:
1) If the support system for the home does
not extend below the frost depth but the anchors do, the ties shall be adjusted
(loosened slightly in the fall and tightened in the spring) to compensate for
the tension caused by the earth movement.
2) If the support system for the home extends
below the frost depth but the anchoring system does not, the ties shall be
tightened in the fall and loosened slightly in the spring.
3) If the anchoring system and the support
system for the home both extend below the frost depth or neither extends below
the frost depth, no provisions for frost heave are necessary.
e) Permanent Foundation. Homes installed on a permanent foundation as defined in Section 870.10 are exempted from this Part.
Disclaimer: These regulations may not be the most recent version. Illinois may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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