Home Page link

Foundation question for a modular home

Building Construction - Building Construction Industry Discussions. 

Page 2 of 3       < 1 2 3 > last >> Bookmark this page:  YahooMyWeb Yahoo!  Google Google  Windows Live Favorites Windows Live  del.icio.us del.icio.us  digg digg  Add to Netscape Netscape
Subject Author Date
Foundation question for a modular home Robertcode 08-30-2006
If you were  Registered and logged in, you could reply and use other advanced thread options
Posted by Bob Morrison on August 30, 2006, 6:29 pm
In a previous post PPS wrote...
> Bob, modular housing must meet local & state codes, not HUD (you are
> thinking of the "Federal Manufactured Housing and Construction Standards
> Program," otherwise known as mobile homes.
>

Dennis:

My mistake on the difference between "modular" housing and mobile homes.
Our local code makes no distinction between "mobile" and "manufactured"
[modular?] homes. Foundations for both must conform to ANSI Standard
A225.1. As I recall, HUD also refers to ANSI A225.1 for manufactured and
mobile homes.

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com

Posted by PPS on September 1, 2006, 9:40 am
Completely understand. Most people do find the relationship between the
various types of products very confusing.

In short, there are two (completely) different types of factory-built
products.

Mobile homes is the old name. It was changed to Manufactured Housing several
years ago. Modular's are a different type of animal all together.

Modular's are constructed under prevailing state and local codes; and are
equivalent to site-built construction. The only real difference is that they
are built in a remote location (in relation to the local building department
where they will eventually be set) and are inspected by a special agency
called a "third party inspection agency". (They act in behalf of the state
and local inspectors, often as an extension of those departments.) In many
cases, the approval of the design is also done by the third party as well.
Most (depending of the state) now comply with the 2003 IRC.

Manufactured housing (also know as mobile homes) are constructed under a
federal program, under the control of Housing and Urban Development. The
standards differ widely from the IRC and allow for this 'special' type of
construction (mostly in materials and on-site loads). The electrical,
plumbing, mechanical and fire safety standards are also different.

While modular's can be built where a lot of work is to be done on-site (for
instance the installation of the HVAC systems, sprinklers, even additional
construction), manufactured housing on the other hand must be completely
finished (or nearly so, perhaps a bit of siding or shingles, etc.).

As for foundations, Manufactured Housing (Mobile Home) foundations are
subject to local codes (whatever the site-built codes require.) ANSI A225.1
only comes into play if a state or local building department has adopted it
for use (most don't.)





> My mistake on the difference between "modular" housing and mobile homes.
> Our local code makes no distinction between "mobile" and "manufactured"
> [modular?] homes. Foundations for both must conform to ANSI Standard
> A225.1. As I recall, HUD also refers to ANSI A225.1 for manufactured and
> mobile homes.



Posted by Bob Morrison on September 1, 2006, 10:43 am
In a previous post PPS wrote...
> Mobile homes is the old name. It was changed to Manufactured Housing several
> years ago. Modular's are a different type of animal all together.
>
> Modular's are constructed under prevailing state and local codes; and are
> equivalent to site-built construction. The only real difference is that they
> are built in a remote location (in relation to the local building department
> where they will eventually be set) and are inspected by a special agency
> called a "third party inspection agency". (They act in behalf of the state
> and local inspectors, often as an extension of those departments.) In many
> cases, the approval of the design is also done by the third party as well.
> Most (depending of the state) now comply with the 2003 IRC.
>
> Manufactured housing (also know as mobile homes) are constructed under a
> federal program, under the control of Housing and Urban Development. The
> standards differ widely from the IRC and allow for this 'special' type of
> construction (mostly in materials and on-site loads). The electrical,
> plumbing, mechanical and fire safety standards are also different.
>

Dennis:

Thanks for the detailed explanation. The difference in the two types of
construction came to me after my initial posts on the subject. Sort of
like "DOH! I get it!"

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com

Posted by Bob Morrison on August 30, 2006, 6:36 pm
In a previous post PPS wrote...
> I work in this industry and can't answer the question. Most foundations I've
> seen are completely level as the home is lifted off the carrier and placed
> on the foundation with a crane.
>

Dennis:

An additional follow-up. I now remember the distinction between
"modular" and "mobile/manufactured" homes.

The former can set on conventional foundations with pony walls provided
that there is an adequate lateral force connection between the module and
the pony wall/foundation. If properly designed this can be a quick and
economical form of construction.

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com

Posted by Robertcode on August 30, 2006, 7:54 pm
Bob, could you translate that in to English for the uneducated in
Construction? ;)


Bob Morrison wrote:
> In a previous post PPS wrote...
> > I work in this industry and can't answer the question. Most foundations I've
> > seen are completely level as the home is lifted off the carrier and placed
> > on the foundation with a crane.
> >
>
> Dennis:
>
> An additional follow-up. I now remember the distinction between
> "modular" and "mobile/manufactured" homes.
>
> The former can set on conventional foundations with pony walls provided
> that there is an adequate lateral force connection between the module and
> the pony wall/foundation. If properly designed this can be a quick and
> economical form of construction.
>
> --
> Bob Morrison, PE, SE
> R L Morrison Engineering Co
> Structural & Civil Engineering
> Poulsbo WA
> bob at rlmorrisonengr dot com


Page 2 of 3       < 1 2 3 > last >>
Similar ThreadsPosted
Superior Quality In Modular Home Construction June 17, 2007, 5:42 am
Modular Home Building Company in Concord, Ontario May 30, 2007, 1:08 am
Re: Foundation Too Low on a New Home June 30, 2006, 12:13 am
Re: Foundation Too Low on a New Home June 30, 2006, 10:14 am
Solution to Foundation Being Started Too Low on New Home June 30, 2006, 1:31 pm
Moisture on Foundation walls in basement...New Home May 13, 2007, 3:58 pm
Horizontal crack in foundation - found on home inspection October 25, 2006, 1:22 pm
New Home - Newly poured foundation appears decaying March 11, 2007, 11:00 pm
modular homes February 15, 2007, 4:32 pm
Modular Homes May 27, 2008, 12:27 pm

Contact Us | Privacy Policy

XML SitemapXML Sitemap