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Who would win: one of the most destructive natural disasters ever seen, or some strappy bois
Those anchor points are going to need to be driven really deep to do anything - the ground is already waterlogged
Saw an interview with the family. The anchors are in 8ft deep concrete. This would probably be somewhat effective at at least preventing the roof from being ripped off.
Won't do much against swell or flying objects though. But they know that
Most of the comments I have seen say that the wind on the straps is going vibrate the roof away. I don't know personally, but that sounds like a likely outcome
Couple twists in each strap will fix that.
How does that work if you could explain?
Wind causes a straight ratchet strap to vibrate, almost like a reed in certain types of wind instruments. You'll notice the same thing if you strap something to the roof of your car or in the bed of a pickup and drive it in the highway. It makes for a very noisy ride.
Giving the strap a twist or two, wherever it's not contacting something, will stop it from vibrating and it will be much quieter.
Roof trusses have hurricane clips and ties after Andrew fucked everything up back in 1992.
This likely does nothing the roof can't already do.