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RE: HUD 7584 - Question

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I've seen better trailer bracing. North of here in Paso Robles, California right after the earthquake I saw a trailer there with 18" square steel pads staked into the ground at 4 corners. The pad had a steel strut at a 45 degree angle up to the trailer. It was bolted to the trailer with through bolts. There were 6 or 8 of these around the trailer, spread out on two sides. That kind of brace only works in compression. The stakes can not be relied on for tension. The product was a commercially available trailer brace. I don't have the photo any more to look up who made it.

Dave Gaines, P.E.

Structural Project Engineer
HDR ONE COMPANY | Many Solutions
251 S. Lake Ave, Suite 1000
Pasadena, CA 91101
T: 626.584.4960
F: 626.584.1750
email: david.gaines(--nospam--at)


From: David Maynard [mailto:d_maynard(--nospam--at)]
Sent: Thursday, July 17, 2008 4:00 PM
To: seaint(--nospam--at)
Subject: HUD 7584 - Question

Got a tie-down issue.


Homeowner has a single wide mobile home that is tied down with #4 rebar along each beam under the structure (four tie-downs for each beam).  The #4 is pounded into the ground (shale) approximately 24” below grade.  Another #4 bar, with hook on the top, is welded to the stick pounded into the ground.  The hook is then welded to the beam under the structure.


The unit is 12’ wide by 70’ long.  It’s been used for 18 years without these tie-downs.


I’m asked to verify that these tie-downs are in accordance with HUD.  Upon inspection, I am saying no, which I know will make my client, and likely the homeowner, unhappy.  Simply put, I can’t convince myself that this is an adequate construction, and I don’t want to put my stamp on it. 


Am I missing something in the “Acceptable Methods of Ranch Engineering”?  I’m looking for advice, ASAP.



David Maynard