Steel SIPs are not load bearing and are used as a cladding in most installations. You will still need to frame the structure.

Dear Drizzle,

I think you may be asking questions that have no real relationship to your problem. The width of the panel, the thickness of it, what kind of fill it has, I do not see how these relate to hurricane strength winds. Those kind of winds will pick up any panel, it doesn't matter what size. The thickness of the outer skin should be enough that it will not be punctured by an object that is flying through the air at the maximum wind speed. In the US we often use a flying 2 x 4 for this test. The Indians will fab up the panel however you say, but they may may not know what exactly you need.

What you really need here is a way to fasten the panels down strongly enough that the wind can not pick them up and send them over to the next island. There are a number of ways, but I have never personally worked with that kind of wind load and am unable to offer more specific advice. If you care to post more, I would be interested to hear how you address this challenge.

Wrong. You can have structural, load-bearing steel SIPs. One manufacturer is PermaTherm.

There are SIPs manufacturer in Chile which is closer to you