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Optimal earthquake bracing to retrofit on older double wide.

by Jimmy
(Palm Springs, CA, USA)

I recently bought a 1971 Skyline 40' double wide sitting on 20 old-style cement piers, which are not bolted to the frame. Some of the wood pier pads are quite deteriorated. A few of the piers are now hyperextended with no allowance left for further leveling. The foundation (or lack of an adequate one) reallly got my attention when two relatively small earthquakes in recent months caused my little house to rock and roll to the point of downright scary. The previous owners did a lot of upgrades... new ceramic tile throughout, double pane thermal windows, etc., some of which added a great deal of weight to the house. They should have had the foundation checked, house leveled and a steel pier system put in before the upgrades, but did not. In less than a year after the heavy tile was laid, there are already hairline cracks in the ceramic tile grout and some permeter sag. I'm now exploring a new foundation system, which one would think would be straight-forward and easy, but guess again....

My house is on a rental lot and is too old to meet requirements for financing, so I'm not concerned about FHA or bank standards, and I'm not able to retrofit a permanent foundation on rented land. I just want to feel safe in my home and have the best possible foundation for minimizing loss in a big earthquake. I've had 5 different contractors out. Each has told me something significantly different as to what would be best and most cost effective... to the point it's all become very confusing. Who knew there are so many different ways to go on this... and supposedly (according to each contractor) still meet California code for seismic bracing??? The contractor who was most convincing with his recommendation is, of course, by far the highest priced.

I've researched extensively on line, read the State of California code for mobile home earthquake bracing, and still I'm left with questions as to what is truly optimal on an older mobile home, or most effective without spending more money than is really necessary. I'm not looking for the cheapest system to meet some outside agency or party's requirements... I want what is truly most effective without gong overboard and spending more than is necessary. Does someone "in-the-know" have experience with this such that they can suggest a truly good system that does not cost an arm, a leg, and my first born?... and maybe recommend a reliable contractor in southern California to have it installed properly?

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Feb 25, 2011
Call Us
by: John DL Arendsen

You want some straight answers and real pricing without a lot of BS? Call or email us:, 800 909-1110 or 760 815-6977.

Oct 12, 2010
earthquake bracing to retrofit on older double wid
by: Vince

Hello from Hayward,Ca
After looking at some hard to find information on the damage from the Northridge earth quake in 1994 I am adding to my earthquake supports because we might have a for a big quake in the future. Look up
Stabilizer Systems, Inc
Stabilizing System,.San Bernardino 800-558-1222
Piers are about $20 each and earth quake piers about $100 to $180 each. You should have at least 12 all secured to the ground and X connected . Over 4000 mobile homes fell off their piers in the 1994 Northridge quake that lasted about 40 seconds. A good earthquake system may cost about $2500 installed.

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