Matthew Gilchrest wrote: The main problem is from resedences that are not mounted directly to the earth. Any time air gets under and object like that at a high velocity, it tends to lift. That is when the fun starts.
I pointed that one out too

Not sure I'd call it fun though.
Many states other than Florida do not have good provision or laws for the proper mounting of trailers to the earth. Many have survived because of the not-so-violent weather conditions.
Other than, that being a prioblem to address on all houses, you're right. And it should be fixed. A few years ago I help a guy build a house. It was a huge 2 story job, but build on block pillars. The floor joists just rest on top of them. The floor is 18" -24" off the ground. But it meets the building codes.
My problem is that engineers understand that these trailers will react in a certain manner. They do not push hard enough for the right installation, or the local governing body just doesn't really care.
I's not the engineers. It the politicians and the manufacturers. See below.
There is only so much safety you can build in, however, when people are only looking to pay $30K or less for their residence (not pointing a finger at you Thomas, as your's probably cost consideraly more).
Not really, under $40k. 52'x48' "double wide", with some customization, so it was buit to order. Took ~ 1 month form order to arrival. Same house would have cost 2-2.5x around here to build not counting the land and site prep (about the same either way).. It's better built than any $75k, older house in the area, and better insulated for lower utilities.
I got the best insulation I could and double pane windows. I couldn't get the high rated roof load, they only sell it up north. I couldn't get the better tie-down system, only available in costal / hurricane areas. Those are because of the regional manufacturing. So the site near me, don't have the tooling, parts, or experience to build those "options". I could have ordered form up north, and got better roof loading and higher insulation, but the cost for transport here (transport cost is high) would take 40 years to recover in my utilities. If I went south for the better tie-downs, then I only get the benifit of the cost if it survives a tornado, not even an insurance break.
The manufacturers won't add the options untill required by law becauise other wise they won't sell well enough. Just like in the auto industry, try to get a column shift, 3 speed transmission. a Diesel powered full size sedan (think bio-diesel), or a full-sized 2-door (like so many were in the 70's). People won't pay the extra (back to trailers) if the don't have too. Politicians won't require it becaue of the effects on their voters, who see an increased cost of housing for no benifit, and manufacturers would loose sales too.
I think I'm far enough north to not be affected by 99% of the hurricanes, and tornados are real bad here. My in-laws have an old trailer, near the gulf coast in MS. They've been lucky with the direction the hurricanes go, usually east of them. But I wouldn't live in that trap, down there.