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Codes & standards for manufactured homes, mobile homes, doublewides, multiwides, & trailers.
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In the U.S. the HUD code (cited below) is a national preemptive building code that pertains to manufactured homes. A mobile home is a factory-built dwelling built prior to June 15, 1976, to standards other than the HUD Code, that were acceptable under applicable state codes in effect at the time of construction or introduction of the home into the state.
Manufactured Homes other countries such as Australia are regulated by different laws.
U.S. Manufactured Home Codes & Standards
However the term "manufactured home" is used by different authoritis to include a variety of construction types as we list next. Manufactured homes include:
The following is the opinion of the author and has not had a technical review by other industry experts. Various trailer, mobile home, and modular housing manufacturers may disagree with some of these views. Corrections and content suggestions are welcome.
Australian Manufactured Home Codes & Standards
Other Useful Codes References & Standards for Manufactured Homes & Mobile Homes
Question: building codes for manufactured home steps
what are the florida codes for a Manufactured Home steps. Can they be steal attached or wooded removable - Melissa 7/18/2012
Specific examples of unsafe steps and railings at mobile homes and manufactured homes can be found "
Because there are many trip and fall hazards that maybe present at stairs and railings, see our separate articles STAIRS, RAILINGS, LANDINGS, RAMPS and CODES for STAIRS & RAILINGS. In addition to those specifications for safe steps and railings, most states require safe and securely-attached entry and exit stairs at both the primary entry to the home and also to a secondary safety or fire exit pathway from the home.
Some later model manufactured homes are provided with emergency egress windows (push out or pop out) but there should be at least two exit doors at opposite ends of the structure.
Do the same building codes regulate the construction of modular homes and caravans, trailers, doublewides, mobile homes?
In order to sort out the question of what are common construction practices and what is usually included or not with a manufactured home, we first need to get a couple of confusing terms straightened out.
You originally posted question about double-wide mobile home construction in our article on modular construction (MODULAR HOME CONSTRUCTION) .
In a separate article we define modulars, factory built homes, comparing them with caravans, trailers, mobile homes, doublewides: see DEFINITIONS of Mobile Home, Doublewide, Modular, Panelized Construction, where we give details about the differences in these types of construction.
Double-wides and mobile homes are not built using the same structural materials, codes, standards as modular homes. Details about double-wide homes and mobile homes are discussed separately beginning in the article starting at the top of this page: MOBILE HOMES, DOUBLEWIDES, TRAILERS.
So What' the Difference Between a Manufactured Home, Mobile Home, & do the same building codes apply?
Yes and no: some codes contain provisions for manufactured or mobile homes, (MOBILE HOME ELECTRICAL DEFECTS) while in other cases and locations those structures are governed by specific building codes.
A modular home is built using conventional 2x4 or 2x6 wood framing much like a stick built house, but it is constructed in several sections that are then trailered to a building site, set upon a conventional building foundation or slab, and fastened together there. The floor of each section is built strong enough to be placed on a temporary trailer for transport to the building site where the trailer chassis is removed prior to assembly of each section.
Building codes and standards for modulars are essentially the same as for a stick-built residential home. Even when the modular home is built in a different state from which it is to be assembled, the home must comply with state building codes.
What building codes regulate mobile homes & doublewide homes?
A double-wide or mobile home or trailer (also called house trailers or "static caravans") is typically built to different building standards than a conventional stick-built house or modular built house. These homes are completely assembled in a factory and trailered to a site where they are parked. The structure includes a permanently-attached trailer chassis, axle, wheels, trailer hitch that are used to deliver the home and can (in concept) be used to move it later.
Unlike modular homes whose constructions are regulated by state and local building codes, mobile homes, double-wides and trailers, are regulated by the U.S. Department of Housing and Urban Development (HUD), via the Federal National Mfd. Housing Construction and Safety Standards Act of 1974.
This national regulation has allowed many manufacturers to distribute nationwide because they are immune to the jurisdiction of local building authorities. There are, however, windzones adopted by HUD that home builders must follow. Depending on where a mobile home is located, these wind zone regulations can require special anchoring or tie downs to reduce the chances of the home being overturned in a storm.
Based on the description in your posted comment/question and your email, you are describing a double-wide mobile home.
Question: where can I find the HUD Section 184 Red Tag on my Home?
Where would the section 184 Red Tag be located on a 1983-West single wide? - Suzanne
(Apr 16, 2014) Sharon said: how do I find the mobile home manufacturer information?
How can I find the name of the manufacturer and model, and possibly a serial number of a 1971 manufactured home? The title says Make: MALB, Body: HS. The home now has vinyl siding so any label is concealed.
Sharon, in this article at MOBILE HOME LABELS we list some locations where you might find the data tag on your mobile home - that's where the manufacturer should be identified. On a home as old as yours there may be no tag. At that point I'd start asking my neighbors who have similar-aged homes.
Reply: See if your home qualifies under HUD Section 184 financing rules
Other HUD Section 184 Indian Home Loan Guarantee Program rules that determine if a home qualifies for 184 financing (and thus will bear a red tag) include: 
Examples of mobile home labels are found at MOBILE HOME LABELS.
Question: trouble financing a 1975 singlewide - what are the regulations?
(Feb 25, 2014) Anonymous said:
I have a beautiful remodeled 1975 singlewide trailer with 2 large additions we are selling we have a interested buyer but the banks wont finance it due to the fact that's its a 1975> what are the federal laws re:1976 cut off?
I think you or the bank are referring to the Federal Manufactured Home Construction and Safety Standards (commonly known as the HUD Code) that went into effect June 15, 1976. The bank is saying that a home built before June 15 1976 was not regulated to standards that they are willing to finance.
Here is what the U.S. HUD says about this key date:
Homes built prior to June 15, 1976, even with modifications, do not meet the HUD standards and cannot be accepted as compliant with the HUD Code. As the homeowner, you may find a licensed engineer willing to inspect your home for compliance with your state's housing code. FHA does not insure mortgages on manufactured homes built prior to June 15, 1976. Most other mortgage insurance firms follow FHA's policy.
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