Current through Register Vol. 28, No. 3, September 1, 2024
9.1 Manufactured homes shall be installed, at minimum, in accordance with Section 4421(b) of this chapter and all applicable regulations of the United States Department of Housing and Urban Development ("HUD)," as set forth in the Code of Federal Regulations ("C.F.R."). HUD requirements are available online at www.dpr.gov.
9.2 Site suitability. Pursuant to 24 C.F.R. §
3285.103, prior to the initial installation of a new manufactured home, the installer shall verify that the design and construction of the home, as indicated on the design zone maps provided with the home, are suitable for the site location where the home is to be installed.
9.3 Site preparation.
9.3.1 Soil conditions. Pursuant to 24 C.F.R. §
3285.201, the manufactured home's foundation shall be constructed on firm, undisturbed soil or fill compacted to at least 90 percent of its maximum relative density, and the site shall be graded to ensure adequate drainage. Pursuant to 24 C.F.R. §
3285.202, the soil classification and bearing capacity shall be determined before the foundation is constructed and anchored.
9.3.2 Drainage. Pursuant to 24 C.F.R. §
3285.203, drainage shall be provided to direct surface water away from the manufactured home to protect against erosion of the foundation supports and to prevent water build-up under the home. All drainage shall be diverted away from the home and must slope a minimum of one-half inch per foot away from the foundation for the first ten feet.
9.4 Foundation construction. Foundations for manufactured home installations shall be designed and constructed in accordance with 24 C.F.R. §§
3285.301- 3285.315 and must be based on site conditions, home design features, and the loads the home was designed to withstand, as shown on the home's data plate.
9.4.1 Piers. Pursuant to 24 C.F.R. §
3285.302, the piers used shall be capable of transmitting vertical live and dead loads to the footing or foundation. Pier materials, design, loads, configuration and location shall meet the requirements set forth at 24 C.F.R. §§
3285.303- 3285.312.
9.4.2 Footings. Pursuant to 24 C.F.R. §
3285.312, materials approved for footings shall provide equal load-bearing capacity and resistance to decay. Footings shall be placed on undisturbed soil or fill compacted to 90 percent of maximum relative density. A footing shall support every pier. Footing materials, placement, and sizing shall meet the requirements set forth at 24 C.F.R. §
3285.310.
9.5 Anchoring. Pursuant to 24 C.F.R. §§
3285.401- 3285.406., the manufactured home shall be secured against the wind, including wind in the longitudinal direction, by use of anchor assembly type installations or by connecting the home to an alternative foundation system, as set forth at 24 C.F.R. §
3285.301. Ground anchor installations shall meet the requirements for certification and testing, specifications, number and location set forth at 24 C.F.R. §
3285.402.
9.6 Installation of optional features. Optional features, such as expanding rooms, appliances, and skirting, shall be installed pursuant to the requirements set forth at 24 C.F.R. §§
3285.501- 3285.505.
9.6.1 Comfort cooling systems. Pursuant to 24 C.F.R. §
3285.503, when not provided and installed by the home manufacturer, any comfort cooling systems that are installed shall be installed according to the appliance manufacturer's installation standards. Installation of any comfort cooling system shall meet the requirements set forth at 24 C.F.R. §
3285.503(a).
9.7 Ductwork, plumbing and fuel supply systems.
9.7.1 Ductwork connections. Multi-section homes with ductwork in more than one section require crossover connection to complete the ductwork system of the manufactured home. All ductwork connections shall be sealed to prevent air leakage. Installation, sealing and support of ductwork shall meet the requirements set forth at 24 C.F.R. §
3285.606.
9.7.2 Plumbing.
9.7.2.1 Water supply. Multi-section homes with plumbing in both sections require water-line crossover connections to join all sections of the manufactured home. Crossover design requirements are set forth at 24 C.F.R. §
3280.609. When the local water supply pressure exceeds 80 psi to the home, a pressure-reducing valve shall be installed. Standards for installation of the mandatory shutoff valve, freezing protection and testing procedures are set forth at 24 C.F.R. §
3280.609.
9.7.2.2 Drainage system. Multi-section homes with plumbing in more than one section require drainage system connections to join all sections of the home. Installation, assembly, support and testing of drainage systems shall meet the requirements set forth at 24 C.F.R. §
3285.604.
9.7.3 Fuel supply systems. The gas piping system in the home shall be designed for pressure that is at least 7 inches of water column and not more than 14 inches of water column. Installation, crossovers and testing shall meet the requirements set forth at 24 C.F.R. §
3285.605.
9.8 Electrical systems. Pursuant to 24 C.F.R. §
3285.701, multi-section homes with electrical wiring in more than one section require crossover connections to join all sections of the home. Pursuant to 24 C.F.R. §
3285.702, exterior lighting fixtures, ceiling-suspended fans and chain-hung lighting fixtures shall be installed as required by their listings and 24 C.F.R. § 3280 . Installation, grounding and testing shall meet the requirements set forth at 24 C.F.R. §
3285.702. Pursuant to 24 C.F.R. §
3285.703, smoke alarms shall be functionally tested as required by the manufacturer instructions and shall be consistent with 24 C.F.R. §
3280.208. Considerations concerning installation of telephone and cable TV are set forth at 24 C.F.R. §
3285.906.
9.9 Exterior and interior close-up.
9.9.1 Exterior close-up. Pursuant to 24 C.F.R. §
3285.801, exterior siding and roofing needed to join all sections of the manufactured home shall be installed according to manufacturer installation requirements consistent with 24 C.F.R. §§
3280.305 and 3280.307. Weatherproofing and installation of hinged roofs and eaves shall meet the requirements of 24 C.F.R. §
3285.801.
9.9.2 Structural interconnection of multi-section homes. Pursuant to 24 C.F.R. §
3285.802, for multi-section homes, structural interconnections along the interior and exterior at the mate-line are required to join all sections of the home. Structural interconnection and closing of gaps shall meet the requirements set forth at 24 C.F.R. §
3285.802.
9.9.3 Interior close-up. Pursuant to 24 C.F.R. §
3285.803, all shipping blocking, strapping or bracing shall be removed from appliances, windows and doors. Installation of shipped-loose wall paneling shall meet the requirements of § 3285.803.
9.9.4 Bottom board repair. The bottom board covering shall be inspected and repaired pursuant to the requirements of 24 C.F.R. §
3285.804.
9.10 Skirting. Pursuant to 24 C.F.R. §
3285.504, skirting, if installed, shall be of weather-resistant materials or provided with protection against weather deterioration at least equivalent to that provided by a coating of zinc on steel of not less than 0.30 oz./ft.2 Installation of skirting shall meet the requirements set forth at 24 C.F.R. §
3285.504.
9.11 Completion of operational checks and adjustments. Upon completion of installation, installer shall check all items listed in Rule 9.0 and shall make any needed adjustments to ensure compliance with all HUD requirements.
