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NFPA 225, Model Manufactured Home Installation Standard

2021 NFPA 225 - Current Edition
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  • Description

    The 2021 edition of NFPA 225, Model Manufactured Home Installation Standard, presents the latest requirements for safer, more efficient, and more effective installation of manufactured homes.

    The 2021 edition of NFPA 225 does more to help ensure that installers are able to do their jobs effectively. Details on smoke alarms, CO detectors, and fire sprinkler systems are thoroughly outlined in NFPA 225.

    Changes for the 2021 edition include:

    • A revision in scope that widens the use of the document to international reach
    • A new definition of dwelling unit, to correlate with NFPA 101®, Life Safety Code®
    • A new section on interior finish requirements from NFPA 286, Standard Methods of Fire Tests for Evaluating Contribution of Wall and Ceiling Interior Finish to Room Fire Growth
    • Removal of the requirement for water mist systems
    • Updates to referenced publications and NFPA extracts

    Use NFPA 225 to help protect people in manufactured homes from potentially deadly hazards.

    From site preparation through final inspection, the 2021 edition of NFPA 225 gives engineers, manufacturers, and AHJs the information they need to comply with the safety and health requirements for the installation of manufactured homes. (Print, 76 pp., 2021)

    Get up to date with the most current requirements by placing your order for NFPA 225, Model Manufactured Home Installation Standard, today.

  • Table of Contents (2021 Current Edition)

    NFPA® 225 Model Manufactured Home Installation Standard, 2021 Edition

    Chapter 1 Administration
    1.1 Scope.
    1.2 Purpose. (Reserved)
    1.3 Application.
    1.4 Retroactivity.
    1.5 Term Use.
    1.6 Equivalency.
    Chapter 2 Referenced Publications
    2.1 General.
    2.2 NFPA Publications.
    2.3 Other Publications.
    2.4 References for Extracts in Mandatory Sections.
    Chapter 3 Definitions
    3.1 General.
    3.2 NFPA Official Definitions.
    3.3 General Definitions.
    Chapter 4 General
    4.1 Preinstallation Considerations.
    4.2 Alterations.
    4.3 Data Plate.
    4.4 Installation Considerations.
    4.5 Design and Construction.
    Chapter 5 Site Preparation
    5.1 Access for Transporter.
    5.2 Encroachments and Setback Distances.
    5.3 Fire Separation Distance.
    5.4 Issuance of Permits.
    5.5 Site Preparation.
    5.6 Investigation and Bearing Capacity of Soil.
    5.7 Drainage.
    5.8 Ground Moisture Control.
    Chapter 6 Foundations
    6.1 General.
    6.2 Piers.
    6.3 Footings.
    6.4 Permanent Foundations.
    6.5 Special Considerations.
    Chapter 7 Installation Procedures
    7.1 Before Moving Manufactured Home to Location.
    7.2 Positioning of Home.
    7.3 Interconnection of Multisection Homes.
    7.4 Crossover Connections for Multisection Manufactured Homes.
    7.5 Anchoring Instructions.
    7.6 Installation of On-Site Structures.
    7.7 Installation Close-Up/Finishing.
    Chapter 8 Site-Installed Features
    8.1 Installation of Site-Installed Features.
    8.2 Hinged Roofs and Eaves.
    8.3 Garden and Bay Windows.
    8.4 Awnings and Ramadas.
    8.5 Miscellaneous Lights and Fixtures.
    8.6 Ventilation Options.
    8.7 Optional Panels, Siding, and Molding.
    8.8 Skirting.
    8.9 Telephone and Cable TV.
    8.10 Joints and Seams.
    Chapter 9 Preparation of Appliances
    9.1 Clothes Dryer Vent.
    9.2 Comfort Cooling Systems.
    9.3 Fireplace and Wood-Stove Chimneys and Air Inlets.
    9.4 Range, Cooktop, and Oven Venting.
    9.5 Flood Hazard Areas.
    9.6 Seismic Design Categories D0, D1, D2, and E.
    Chapter 10 Utility System Connection and Testing
    10.1 Proper Procedures.
    10.2 Water Supply.
    10.3 Drainage System.
    10.4 Gas Supply.
    10.5 Heating Oil Systems.
    10.6 Electricity.
    Chapter 11 Life Safety Features
    11.1 Smoke Alarms.
    11.2 Fire Sprinkler Systems.
    11.3 Carbon Monoxide Detectors.
    11.4 Fire Separation Distances.
    Chapter 12 Installation in Flood Hazard Areas
    12.1 General.
    12.2 Lowest Floor Elevation.
    12.3 Foundations and Anchoring.
    12.4 Installation Procedures.
    12.5 Post-Installation Considerations.
    12.6 Preparation of Appliances.
    12.7 Utility Systems.
    Chapter 13 Seismic Provisions for Prescriptive Design of Support Systems
    13.1 Scope.
    13.2 Minimum Prescriptive Support System Requirements.
    13.3 Prescriptive Pier Support Systems.
    13.4 Prescriptive Foundation Wall Support Systems.
    13.5 Prescriptive Wood Cripple Wall Support Systems.
    Chapter 14 Seismic Installation and Equipment Bracing Requirements
    14.1 General.
    14.2 Site-Installed Water Heaters.
    14.3 Site-Installed Equipment.
    14.4 Utility Attachments.
    Chapter 15 Prescriptive Flood Provision Designs
    15.1 Scope.
    15.2 Anchorage and Support Materials.
    15.3 General Limitations.
    15.4 Prescriptive Ground Anchor Support and Anchorage System.
    15.5 Prescriptive Foundation Wall Support and Anchorage Systems.
    Annex A Explanatory Material
    Annex B Final Inspection Checklist
    Annex C Sample Checklist for AHJ Officials
    Annex D Sample Schedule for Manufactured Home Installation Permits
    Annex E Informational References
  • Prior Editions

    2017 Edition

     

    The 2017 edition of NFPA 225 does more to help ensure installers are able to do their jobs, so smoke alarms, CO detectors, and fire sprinkler systems are ready to protect people in manufactured homes from potentially deadly hazards.

    The 2017 edition of NFPA 225, Model Manufactured Home Installation Standard presents the latest requirements for safe, efficient, and effective installation of manufactured homes.

    Provisions cover:

    • Preparation of sites intended for manufactured homes
    • Foundations on which the manufactured homes are installed
    • Procedures for on-site installation
    • Connection to appliances and onsite utilities
    • Anchoring of the home for protection against the forces of seismic events, floods, and wind

    New for the 2017 edition:

    The 2013 Standard provided guidance on smoke alarms and carbon monoxide detectors but was silent on how fire sprinkler systems should be dealt with during the installation process. For the 2017 edition, language has been added to ensure that the installer is provided with the necessary information from the manufacturer to accomplish the connection of the fire sprinkler system and system inspection so the system performs as the codes and standards intend.

    Other changes in this edition:

    • Revisions in Section 12.4.2.2 correlate with ASCE 24-14, Flood Resistant Design and Construction, and clarify which items refer to non-engineered flood openings, revising the referenced section number for correlation, and to clarify which items refer to engineered flood openings.
    • References have been updated throughout.

    From site preparation through final inspection, the 2017 edition of NFPA 225 gives engineers, manufacturers, and AHJs the requirements they need to comply with the safety and health requirements for the installation of manufactured homes. (Print, 76 pp., 2017)

    2013 Edition

     

    Consult the 2013 NFPA 225 for comprehensive, up-to-date installation criteria for manufactured homes.

    The 2013 NFPA 225, Model Manufactured Home Installation Standard presents the latest guidelines for safe, efficient, and effective installation of manufactured homes.

    Provisions cover:

    • Preparation of sites intended for manufactured homes
    • Foundations on which the manufactured homes are installed
    • Procedures for on-site installation and erection
    • Management of appliances and utility connections
    • Anchoring of the home and protection against seismic events, floods, and wind

    Keep pace with changes in the 2013 edition, including:

    • New retroactivity provisions specify that requirements are retroactive only where specified or in those cases where the AHJ determines that the existing situation presents an imminent danger.
    • New definition added for imminent danger.
    • New section on water mist sprinkler systems requires such systems to have a water supply system that complies with NFPA 13D, Standard for the Installation of Sprinkler Systems in One and Two-Family Dwellings and Manufactured Homes or the additional requirements of NFPA 750, Standard on Water Mist Fire Protect Systems.

    From site preparation through final inspection, the 2013 NFPA 225 gives engineers, manufacturers, and AHJs the guidance they need to help ensure the safety and health of manufactured home users. (Softbound, 64 pp., 2013)

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