I am from the Caribbean and we have a lot of termites so OSB SIPs are not an option, my question is this, are steel SIPs Structural like OSB SIPs?
SIP = Structural Insulated panels.
EPS = Expanded Polystyrene
OSB = Oriented strand board
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are steel SIPs Structural like OSB SIPs
Yes. They are generally equivalent as they both do the same job, for the same reason other than they are using different materials, wood based materials vs metal based materials. You can temporarily remove the specific materials from your thinking and everything is about the same, including where support members are located, where and how things are attached, etc. This is all about materials. During the design of the materials, the steel SIPs are designed such that they generally mimic the wood based materials. In reality, the actual numbers are likely different but this is on a smaller scale / fine tuning level