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Glossary of Terms for Foundation Designs of Manufactured Homes

Below are some glossary of terms for our FHA, HUD, and VA manufactured home foundation engineering designs and plans. If you can not find you answer here, please also go to our Fequently Asked Questions page.

Glossary Index:   A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z


    - A -


  1. Accessory building or structure:
  2. Any awning, window awning, cabana, ramada, storage cabinet, storage building, private garage, carport, fence, stairway, ramp, or porch, or any other building or structure other than a patio, established for the use of the occupant of a manufactured (mobile) home unit.      ^ top
  3. Appraisal:
  4. Professional valuation done on a manufactured (mobile) home property to find expected value.      ^ top
  5. Approved:
  6. Reviewed and/or inspected and deemed acceptable to the local enforcement agency.      ^ top
  7. Awning:
  8. An accessory structure, used for shade or weather protection, supported by one or more posts or columns and partially supported by a unit or other accessory structure installed, erected, or used on a lot.      ^ top
  9. Awning Enclosure:
  10. An enclosure designed for outdoor recreational purposes, not for habitation, constructed under an awning or freestanding awning, which may include a screen room, and either an accessory building or structure, or a building component.      ^ top
  11. Awning, Freestanding:
  12. An accessory structure, used for shade or weather protection, supported entirely by columns or posts and, other than flashing, not attached to or supported by a manufactured (mobile) home unit or other accessory structure.      ^ top
  13. Awning, Window or Door:
  14. An accessory structure, used for shading a window or door, supported wholly by the unit or other accessory building or structure to which it is attached.      ^ top


    - B -


  1. Branch Water Service Line:
  2. That portion of the water distribution system extended from the manufactured (mobile) home park water main to a lot, including connections, devices and appurtenances.      ^ top
  3. Building Components:
  4. Any subsystem, subassembly, or other system, constructed or assembled, designated for use in, or as part of, an accessory building or manufactured home structure, which may include structural, electrical, mechanical, plumbing, and fire-protection systems and other systems affecting health and safety. However, "building components" do not include appliances or equipment, such as heaters, stoves, refrigerators, or air conditioners.      ^ top
  5. Building Standard:
  6. Any rule, regulation, or other requirement adopted by the state, or a local government pertaining to the construction, plumbing, electrical, and fuel gas equipment, and installations within permanent buildings and/or manufactured (mobile) homes in parks.      ^ top


    - C -


  1. Cabana:
  2. A freestanding accessory building or structure, or building component of a manufactured (mobile) home unit, located immediately adjacent to and intended to increase the living area of that unit, which is a portable, demountable, or permanent room enclosure or other building erected or constructed for habitation. A cabana shall not exceed the size of the unit to which it is an accessory.      ^ top
  3. Carport:
  4. An accessory structure for vehicle parking, used for shade or weather protection, supported by one or more posts or columns and partially supported by a unit or other accessory structure installed, erected, or used on a manufactured (mobile) home lot.      ^ top
  5. Carport, Freestanding:
  6. An accessory structure for vehicle parking, used for shade or weather protection, supported entirely by columns or posts and, other than flashing, not attached to or supported by a manufactured (mobile) home unit or other accessory structure.      ^ top
  7. Certificate of Occupancy:
  8. A document issued by the enforcement agency when a manufactured (mobile) home unit or commercial modular, installed on a foundation system, is approved for occupancy by the enforcement agency.      ^ top
  9. Certification:
  10. A stamp of approval applied to the earthquake resistant bracing system manufacturer's plans and installation instructions.      ^ top
  11. Chassis:
  12. The rectangular, usually steel frame or I-Beams, that supports the manufactured (mobile) home unit and to which the manufactured (mobile) home unit is built upon. The axles are attached to the Chassis and allows the manufactured (mobile) home unit to be transported.      ^ top
  13. Chattel:
  14. Personal as opposed to real property; any tangible movable property. A Chattel installation is neither a fixture nor an improvement to real property, not recorded with the county recorder’s office, remains personal property, and which complies with the requirements of Health and Safety Code section 18551(b).      ^ top
  15. Cited Person:
  16. A person or entity issued a notice of violation for a violation or applicable laws who is responsible for its correction.      ^ top
  17. Combustible:
  18. As applied to building construction is any material or construction which does not meet the criteria of noncombustible.      ^ top
  19. Commercial Modular:
  20. "Commercial modular" means a structure transportable in one or more sections, designed and equipped for human occupancy for industrial, professional, or commercial purposes, which is required to be moved under permit, and shall include a trailer coach. "Commercial coach" has the same meaning as "commercial modular".      ^ top
  21. Common Area:
  22. An area, within the boundaries of the manufactured (mobile) home park, that is not specific to any lot or space and is under the ownership and control of the manufactured (mobile) home park.      ^ top
  23. Concrete Block Pier:
  24. An assembly of load-bearing, concrete blocks with wooden wedges used to support and level a manufactured (mobile) home unit.      ^ top
  25. Concrete Pier:
  26. A concrete load-bearing support that incorporates into its structure an adjustable means of raising and leveling the manufactured (mobile) home unit.      ^ top
  27. Contractor:
  28. Someone (a person or firm) who contracts to build things and is usually licensed with the state to perform work.      ^ top
  29. Crawl Space Area:
  30. The low space beneath the floor of a manufactured (mobile) home; gives workers access to wiring or plumbing and foundation system.      ^ top


    - D -


  1. Dead Loads (DL):
  2. A constant load on a manufactured (mobile) home due to the weight of the supported structure itself.      ^ top
  3. Dependent Unit:
  4. A manufactured (mobile) home unit not equipped with a toilet and sewage disposal system.      ^ top
  5. Drain Connector:
  6. The extension, from the manufactured (mobile) home unit’s or accessory building’s or structure’s drain outlet, to the manufactured (mobile) home lot’s drain inlet.      ^ top
  7. Drain Outlet:
  8. The discharge end of a manufactured (mobile) home unit’s or accessory building’s or structure’s, sewage drainage system.      ^ top


    - E -


  1. ERBS:
  2. The acronym for an Earthquake Resistant Bracing System.      ^ top
  3. ERBS-Manufacturer:
  4. A person, firm or business engaged in assembly or construction of earthquake resistant bracing systems for manufactured (mobile) home units foundations.      ^ top
  5. ERBS-Manufacturer's Installation Instructions:
  6. The specific written directions for an earthquake resistant bracing system to be installed on or under manufactured (mobile) home units and foundations.      ^ top
  7. Earthquake Resistant Bracing System (ERBS):
  8. An anchoring system, bracing system, or other device designed and constructed for the purpose of protecting the health and safety of the occupants of, and reducing damage to, an manufactured (mobile) home unit in the event of an earthquake.      ^ top
  9. Electrical Feeder Assembly:
  10. The overhead or underchassis feeder conductors, including the equipment grounding conductor, together with the necessary fittings and equipment, designed for the purpose of delivering energy from the manufactured (mobile) home's lot electrical service equipment to the branch circuit distribution panelboard of the manufactured (mobile) home unit or accessory building or structure.      ^ top
  11. Electrical Service, Park:
  12. The conductors and equipment for delivering electrical energy from the electrical supply system or the generator of an isolated plant, to the electrical wiring system of the manufactured (mobile) home park.      ^ top
  13. Electrical System, Park-Primary:
  14. That part of the electrical wiring system of the manufactured (mobile) home park distributing electrical energy to the park’s secondary electrical system.      ^ top
  15. Electrical System, Park-Secondary:
  16. That part of the electrical wiring system of the manufactured (mobile) home park distributing electrical energy at a nominal 120 or 120/240 volts, single phase.      ^ top
  17. Electrical Wiring System, Park:
  18. All of the electrical equipment, appurtenances and related electrical installations outside of permanent buildings, units, and accessory buildings or structures within a manufactured (mobile) home park.      ^ top
  19. Emergency:
  20. An occurrence constituting a present or imminent serious risk to life, health, safety, or property requiring immediate correction.      ^ top
  21. Energize:
  22. The act of applying electrical energy, or gas or water pressure.      ^ top
  23. Enforcement Agency:
  24. The governy authority, or any city, county, or city and county that has assumed responsibility for the enforcement of the manufactured (mobile) home foundation standards.      ^ top
  25. Engineer:
  26. A person registered with the State of California as a professional engineer qualified to practice engineering in this state. An engineer designing or approving plans should have skill, knowledge, and expertise in that scope of practice.      ^ top
  27. Engineer's Foundation Certification:
  28. A stamped certification by a licensed professional engineer in the state where the home resides. The Engineer's Certification states that the foundation (or permenant foundation) complies with the standards set forth by the governing agency. Also see Foundation Certification.      ^ top
  29. Equipment:
  30. All materials, appliances, devices, fixtures, fittings, or accessories used in the structural, fire safety, plumbing, mechanical, and electrical systems of manufactured (mobile) home units, accessory buildings and structures, buildings, structures, infrastructures, and systems.      ^ top
  31. Expansive Soils:
  32. Types of soil that shrink or swell as the moisture content decreases or increases. Manufactured home foundations built on these soils may experience shifting, cracking, and breaking damage as soils shrink and subside or expand.      ^ top


    - F -


  1. F.E.M.A.:
  2. An acronym for Federal Emergency Management Agency.      ^ top
  3. FHA Loan, or Mortgage:
  4. FHA loan is a federal assistance mortgage loan in the United States insured by the Federal Housing Administration. While there are limits to the size of FHA loans, they are generous and handle moderate-priced homes almost anywhere in the country, including manufactured (mobile) home units.      ^ top
  5. FHA, F.H.A.:
  6. An acronym for Federal Housing Administration. It is within the U.S. Department of Housing and Urban Development and the set the industry standards for permanent foundation systems for manufactured homes which most other agencies adhere to.      ^ top
  7. Feeder:
  8. The conductors for conveying electrical energy between any two points in the manufactured (mobile) home park’s electrical, wiring system excluding electrical feeder assemblies.      ^ top
  9. Fence:
  10. A freestanding vertical structure erected to enclose an area or act as a barrier generally constructed of posts, boards, wood, wire stakes or rails.      ^ top
  11. Fire Agency:
  12. A city, county, or city and county fire department, or fire district.      ^ top
  13. Fire Hydrant:
  14. A connection to a water source for the purpose of supplying water to a fire hose or other fire protection apparatus, and includes a standpipe.      ^ top
  15. Fire Hydrant System:
  16. All fire hydrants, water piping, pumps, tanks, and valves attached to the water system supplying the hydrants.      ^ top
  17. Fire Hydrant, Private:
  18. A fire hydrant including wet standpipes owned by the manufactured (mobile) home park.      ^ top
  19. Flashing:
  20. Flashing refers to thin continuous pieces of sheet metal or other impervious material installed to prevent the passage of water into a manufactured (mobile) home unit from an angle or joint.      ^ top
  21. Flood Plan, FEMA Flood Plan:
  22. The lowlands adjoining the channel of a river, stream, or watercourse, or ocean, lake, or other body of standing water, which have been or may be inundated by flood water. The channel of a stream or watercourse is part of the floodplain.      ^ top
  23. Footing, or Footer:
  24. The portion of a manufactured (mobile) home foundation support system, in direct contact with the ground, that distributes imposed loads to the soil.      ^ top
  25. Form 433a:
  26. When completed by the governing building deparment and recorded by the governing city or county recorder, the form certifies that the manufactured home was installed on a California-approved permanent foundation or foundation system. It is also titled "Notice of installation of a manufactured home (mobile home) or commercial coach on a permanent foundation". The form can be downloaded from http://www.hcd.ca.gov/codes/mhp/433A.pdf.

    The California Department of Housing and Community Development requires manufactured housing owners who affix their units to foundation systems to record a form known as Form 433A with HCD. The form is to be completed at the time a building permit is issued. After installation has been approved and on the sameday the certificate of occupancy has been issued, HCD shall record Form 433A with the county recorder’s office. Thus, a preliminary title report should reveal whether a Form 433A was recorded.      ^ top
  27. Form 433b:
  28. Owners of s who install their unit on a foundation system are required to complete and submit Form 433B with the County Assessor upon completion of the installation. The form can be downloaded from http://www.hcd.ca.gov/codes/mhp/433B.pdf      ^ top
  29. Form 433c:
  30. If a manufactured (mobile) home park is converted to a resident owned subdivision, cooperative, condominium, or nonprofit corporation and the manufactured (mobile) home owner applies for conversion of their home to a fixture improvement, they would use Form 433C. The form can be downloaded from http://www.hcd.ca.gov/codes/mhp/433C.pdf      ^ top
  31. Foundation Certification:
  32. A stamped certification by a licensed professional engineer in the state where the home resides. The Engineer's Certification states that the foundation (or permenant foundation) complies with the standards set forth by the governing agency. Also see Foundation Certification.      ^ top
  33. Foundation System:
  34. An assembly of materials designed and engineered to resist the imposition of external forces once the manufactured (mobile) home unit or commercial modular is installed upon it. When dealing with manufactured (mobile) homes, it generally consists of piers and footing, a perimiter masonry block skirting on a continuous concrete footing, tie-downs or some sort of anchorage device.      ^ top
  35. Freddie Mac Lending Requirements:
  36. Below are some requirements in order to get a loan from Freddie Mac for a manufactured (mobile) home:
    • Built on a permanent chassis in compliance with HUD.
    • Must have a HUD certification label or data plate.
    • The dwelling unit must be legally classified as real property.
    • Must be at least 12 feet wide and have a minimum of 600 square feet.
    • Must be built after June 15, 1976.
    • Must be affixed and attached to a permanent foundation system and the land must be owned by the borrower (unless located in a condominium project)
    • Must be permanently connected to sewer or other utilities.
    • The wheels and axles must be removed.
    • Must have a licensed engineer or the local building jurisdictions approve any structural modifications.      ^ top


    - G -


  1. Garage:
  2. An enclosed accessory building or structure located on a manufactured (mobile) home lot and designed for the storage of motorized vehicles.      ^ top
  3. Gas Connector:
  4. A flexible connector, listed for exterior use, to convey gas from a gas riser outlet to the gas supply connection of a manufactured (mobile) home unit.      ^ top
  5. Gas Piping System, Park:
  6. The pipe, equipment and related installations, outside of permanent buildings, units, or accessory buildings or structures, for distributing gas throughout the manufactured (mobile) home park.      ^ top
  7. Gas Piping, Main:
  8. A distribution line that serves as a common source of supply for more than one service line.      ^ top
  9. Gas Riser Outlet:
  10. That portion of a park gas service line or gas piping system, extending above ground, serving a manufactured (mobile) home lot.      ^ top
  11. Gas Service Line:
  12. The pipe or that portion of a park gas piping system, extending from the main park gas line to the individual gas riser outlet serving a manufactured (mobile) home lot.      ^ top
  13. Good Cause:
  14. What the enforcement agency would find to be a reasonable basis for failing to appear at the time and place scheduled for a hearing, informal conference, formal hearing, or for not complying with a specified timeline.      ^ top
  15. Grade, Existing:
  16. The surface of the earth adjacent to the manufactured (mobile) home before earthwork takes place.      ^ top
  17. Grade, Finish:
  18. The final surface of the earth adjacjent to the manufactured (mobile) home after all improvements are completed.      ^ top
  19. Gross Floor Area:
  20. The floor area enclosed within the surrounding exterior walls of a manufactured (mobile) home unit, accessory building or structure, or portions thereof. Where there are no walls, "gross floor area" means the usable area contained within the horizontal projection of the roof and floor.      ^ top
  21. Ground Anchor:
  22. That part of a tiedown assembly that is inserted into the ground. Note that Ground Anchors are not allowed in HUD compliant manufactured (mobile) home permanent foundation systems.      ^ top
  23. Guardrail:
  24. A vertical barrier erected along the open edges of a porch or other elevated area to prevent persons from falling to a lower level.      ^ top


    - H -


  1. HUD:
  2. An acronym for the U.S. Department of Housing and Urban Development.      ^ top
  3. HUD Label (or Tag):
  4. The Certification Label (also know as a HUD tag) is a metal plate that is affixed to the outside of the manufactured home. Section 3280.11(b) of the HUD guidelines states, "The label shall be approximately 2 in. by 4 in. in size and shall be permanently attached to the manufactured home by means of 4 blind rivets, drive screws, or other means that render it difficult to remove without defacing it. …The label number shall be etched or stamped with a 3 letter designation which identifies the production inspection primary inspection agency, and which the Sectary shall assign. Each label shall be marked with a 6 digit number which the label supplier shall furnish. The labels shall be stamped with numbers sequentially."      ^ top
  5. Habitable Room or Structure:
  6. Any structure or room within a structure for sleeping, living, cooking, or dining purposes, excluding such enclosed spaces as awning enclosures, closets, pantries, bath or toilet rooms, service rooms, connecting corridors, laundries, unfinished attics, foyers, storage spaces, unfinished cellars, utility rooms, and similar spaces.      ^ top
  7. Handrail:
  8. A railing provided for grasping with the hand for support, erected along one or more edges of a stairway or ramp.      ^ top
  9. Hearing Officer:
  10. The authorized representative of the enforcement agency, or other official authorized to conduct hearings.      ^ top


    - I -


  1. I-Beam:
  2. The main beams or girders under the manufactured (mobile) home having a cross section resembling the letter 'I' that supports the entire unit.      ^ top
  3. Identification Label:
  4. A decal, tag, or label indicating acceptance by the department of a standard plan for an accessory building or manufactured (mobile) home structure.      ^ top
  5. Independent Unit:
  6. A manufactured (mobile) home unit equipped with a toilet and designed to be connected to a manufactured (mobile) home lot sewer inlet.      ^ top
  7. Insignia or Label of Approval:
  8. A tag or label required and permanently affixed to each section of a manufactured (mobile) home unit indicating compliance with applicable regulations of the governing department or with the Federal Manufactured Home Construction and Safety Standards.      ^ top


    - L -


  1. Landing, Stairway:
  2. An individual platform, usually at the top or bottom of a stairway, to ease the transition from a stairway to a level walking surface. Landings for ramps must comply with requirements of local codes.      ^ top
  3. Lath structure:
  4. An accessory structure of open design, having no solid roof or walls.      ^ top
  5. Listed:
  6. All equipment, materials, products, and installations included in a list published by an approved listing agency.      ^ top
  7. Live Load:
  8. A load on the manufactured (mobile) home that is temporary in nature and not constant like a Dead Load. For example, snow, people, etc.      ^ top
  9. Load:
  10. Any of the forces that a structure is designed to withstand, including any permanent force such as the weight of a roof, known as a dead load; any moving or temporary force, such as the weight of occupants, known as a live load; wind loads imposed by wind activity; and seismic loads imposed by seismic activity.      ^ top
  11. Lot Access:
  12. An unobstructed way or means of approaching a roadway or public thoroughfare to or from a manufactured (mobile) home lot.      ^ top
  13. Lot Electrical Service Equipment, Park:
  14. That equipment containing the means to connect or disconnect overcurrent protective devices and receptacles, or other means for supplying a unit, listed appliance, accessory building or structure, or building component from the manufactured (mobile) home park’s electrical supply.      ^ top
  15. Lot Line Change, Adjustment:
  16. The alteration, movement, or shifting of a lot line for an existing lot.      ^ top
  17. Lot Line Creation:
  18. The initial establishment of a lot line for a new lot.      ^ top
  19. Lot Water Service Outlet, Park:
  20. That portion of the manufactured (mobile) home park’s water distribution system, including equipment and devices, provided with a fitting for connecting a manufactured (mobile) home unit's water connector.      ^ top


    - M -


  1. MH-unit, MH:
  2. A term used to replace references to "mobilehome, manufactured home, and a multifamily manufactured home".      ^ top
  3. Manufactured Home (Formerly Mobilehome):
  4. A manufactured home is a single-family house constructed entirely in a controlled factory environment, built to the federal Manufactured Home Construction and Safety Standards (better known as the HUD Code). A manufactured (mobile) home can be connected to utilities and can be parked in one place or affixed or place on a permanent foundations and used as permanent housing.      ^ top
  5. Marriage Line/Wall:
  6. The marriage wall is the area of our home where the two or manufactured (mobile) home units join together. Special mounting plates and bolts are used to ensure a seamless fit.      ^ top
  7. Multiwide:
  8. The common term used to describe a manufactured (mobile) home comprised of more than one transportable section assembled together at the time of installation to form a single-dwelling unit.      ^ top


    - N -


  1. N.F.P.A:
  2. An acronym for the National Fire Protection Association.      ^ top
  3. Noncombustible:
  4. As applied to building construction is any material which meets the criteria for "noncombustible" as specified in the applicable building code.      ^ top


    - O -


  1. Occupant:
  2. For the purposes of this chapter, means a person who lawfully occupies a manufactured (mobile) home unit on a lot.      ^ top
  3. Occupied Area:
  4. The total of all the space occupied by a manufactured (mobile) home unit, including eave overhangs and projections; building components; and all accessory buildings or structures on a manufactured (mobile) home lot.      ^ top
  5. Operator:
  6. The person or entity to whom a permit to operate is issued by the enforcement agency.      ^ top
  7. Owner:
  8. The person or entity that legally owns or possesses an item, property, or business through title, lease, registration or other legal document.      ^ top


    - P -


  1. Park:
  2. For purposes of this chapter, is any manufactured housing community or manufactured (mobile) home park.      ^ top
  3. Park Trailer:
  4. A recreational vehicle that is considered personal property and not real property subject to taxes.      ^ top
  5. Patio:
  6. A paved or raised area not to exceed eight (8) inches in height above grade, used for access or recreational activities.      ^ top
  7. Permanent Building:
  8. Any permanent structure under the control and ownership of the manufactured (mobile) home park owner or operator which is not on a lot and is expressly used in the operation of the manufactured (mobile) home park such as for the park office, a community center, or park storage facilities.      ^ top
  9. Permanent Foundation:
  10. The U.S. Department of Housing and Urban Development (HUD) defines permanent foundation systems as a foundation that has:
    1. A permanent skirting around the perimeter to protect the foundation from vermin and weather.
    2. Permanent (concrete) piers to support the structure, including frost protection of those piers.
    3. Anchorage from the home to the foundation to resist loads caused by wind and earthquake forces.
         ^ top
  11. Permit to Operate:
  12. A permit issued annually by the enforcement agency authorizing operation of a manufactured (mobile) home park.      ^ top
  13. Pier:
  14. A vertical support constructed of concrete, steel, or concrete masonry block (CMU) for the transmission of loads from a manufactured (mobile) home unit, accessory building or structure, or building component, to a footing. A pier does not include the footing.      ^ top
  15. Porch:
  16. A freestanding, outside walking platform, having a floor or deck surface elevated more than eight (8) inches above grade.      ^ top
  17. Power Supply Cord:
  18. A flexible cord assembly of conductors, including a grounding conductor, connectors, attachment plug cap, and all other fittings, grommets, or devices, designed for the purpose of delivering electrical energy from the park’s lot electrical service equipment to the branch circuit distribution panelboard of the manufactured (mobile) home unit.      ^ top
  19. Private Fire Hydrant:
  20. See "Fire Hydrant, Private".      ^ top


    - R -


  1. Ramada:
  2. Any freestanding roof, or shade structure, installed or erected above a unit or accessory building or structure or any portion thereof.      ^ top
  3. Ramp:
  4. An accessory structure providing a sloping path of travel, intended for pedestrian traffic.      ^ top
  5. Recreational Vehicle:
  6. A vehicle which includes a park trailer that is considered personal property and not real property.      ^ top
  7. Registered Owner:
  8. A person registered by the appropriate department as the owner of the manufactured (mobile) home unit.      ^ top
  9. Retaining Wall:
  10. A wall designed to resist the lateral displacement of soil or other materials.      ^ top
  11. Retrofit:
  12. To furnish with new or modified parts or equipment not available or considered necessary at the time of manufacture. In manufactured (mobile) home retrofits it generally means installing tie-downs or anchors, constructing concrete footings and piers, or maybe installing a skirting around the manufactured (mobile) home unit.      ^ top
  13. Roadway:
  14. A thoroughfare for vehicular traffic within a manufactured (mobile) home park.      ^ top


    - S -


  1. Sanitation Station, Recreational Vehicle:
  2. A plumbing receptor designed to receive the discharge of sewage holding tanks of self-contained recreational vehicles and which is equipped with a water hose connection for washing the receptor.      ^ top
  3. Sewage Drain Lateral:
  4. That portion of the manufactured (mobile) home park sewage system that extends to an individual lot drain inlet.      ^ top
  5. Sewage Drainage System:
  6. All the piping within or attached to the manufactured (mobile) home unit or accessory building or structure that conveys sewage or other liquid wastes to the drain outlet.      ^ top
  7. Sewer, Park:
  8. That part of the manufactured (mobile) home park sewage drainage system beginning at the lot drain inlet or from a point two feet downstream from a permanent building drain connection and terminating at the public sewer or private sewer disposal system.      ^ top
  9. Skirting:
  10. Material used to enclose or partially enclose the area under the manufactured (mobile) home unit.      ^ top
  11. Stairway:
  12. A step or any configuration of steps or risers where the run (length) of an individual tread or step does not exceed thirty (30) inches, and which is designed to enable passage from one elevation to another.      ^ top
  13. Standard Plan Approval (SPA):
  14. A plan approved by the governing department for an accessory building or structure, an engineered tiedown system, or a manufactured (mobile) home foundation system, to be installed or constructed on a repetitive basis, for the purpose of obtaining a construction permit through an enforcement agency.      ^ top
  15. Steel Pier:
  16. A steel support that incorporates into its structure an adjustable means of raising and leveling the manufactured (mobile) home unit or accessory building or structure that the pier supports.      ^ top
  17. Support:
  18. The entire pier and footing assembly, used to transfer the loads of a manufactured (mobile) home unit, accessory building or structure, or building component to the ground.      ^ top
  19. Support System:
  20. A system of supports, which sustains the vertical loads of a unit, accessory building or structure, or building component. A support system does not necessarily include a foundation system.      ^ top


    - T -


  1. Technical Service:
  2. The providing of interpretation and clarification by the enforcement agency of technical data and other information relating to the application of manufactured (mobile) home foundation plan approvals and designs.      ^ top
  3. Tensioning Device:
  4. A mechanical device that is part of a tiedown assembly. The tensioning device allows a person to eliminate any slack in the tiedown assembly and maintain the tension established when the slack is eliminated.      ^ top
  5. Testing Agency:
  6. An organization which:
    • Is in the business of testing equipment and installations.
    • Is qualified and equipped for such experimental testing.
    • Is not under the jurisdiction or control of any manufacturer or supplier for any affected industry.
    • Maintains at least an annual inspection program of all equipment and installations currently listed or labeled.
    • Makes available a published directory showing current listings of manufacturer's equipment and installations which have been investigated, certified and found safe for use in a specified manner and which are listed or labeled by the testing agency; and
    • Is approved by the governing department.
         ^ top
  7. Tiedown Assembly:
  8. An assembly of component parts that has been tested and listed by agencies approved by the governing department as complying with the requirements for the anchoring of manufactured (mobile) home to the foundation system.      ^ top
  9. Tiedown System:
  10. A tiedown system is used in conjunction with a support system and consists of the total number of tiedown assemblies required to provide a manufactured (mobile) home or mobilehome with resistance to wind loads.      ^ top


    - U -


  1. Unit:
  2. A manufactured home, mobilehome, a multifamily manufactured home, or recreational vehicle.      ^ top


    - V -


  1. Vapor Barrier:
  2. A vapor barrier is used to prevent or limit the amount of moisture which may rise upward from the ground through a crawlspace area. A vapor barrier is desirable when people and/or animals are intended to inhabit an area on a regular basis. It helps ensure proper insulation and function for surfaces such as tile, carpet, etc. It also prevents condensation from building up and also helps to deter mold.      ^ top
  3. Violation:
  4. A failure to conform to the requirements, or any other applicable provision of law.      ^ top
  5. Violation, Maintenance:
  6. A violation discovered during a maintenance inspection.      ^ top


    - W -


  1. Water Connector:
  2. The flexible extension connecting the water distribution system of the manufactured (mobile) home unit or accessory building or structure to the manufactured (mobile) home park’s lot water service outlet.      ^ top
  3. Water Distribution System:
  4. All of the water supply piping within a park, extending from the main public supply or other source of supply to the park’s lot water service outlets and including branch service lines, fittings, control valves, and appurtenances.      ^ top
  5. Water Main, Park:
  6. That portion of the water distribution system which extends from the main, water meter, or other source of supply to the branch water service lines.      ^ top
  7. Water Supply Connection:
  8. The fitting or point of connection of the manufactured (mobile) home unit‘s or accessory building or structure’s water distribution system designed for connection to a water connector.      ^ top
  9. Working Days:
  10. Generally speaking, it is all days except Saturdays, Sundays, and applicable local, state and federal holidays.      ^ top
  11. Workmanlike:
  12. Work performed to the acceptable quality of generally recognized industry standards that does not compromise strength, function, or durability.      ^ top













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In North Carolina, all projects are performed by Harrison Engineering Services PLLC our affiliated company.
In Montana, all projects are performed by Harrison Engineering Services our affiliated company.


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