Steel structures & SIP panels have proven very durable and usually are the structures of choice for highly-loaded buildings or civil structures like high-rise buildings, large span bridges, towers, etc.
Of course, all structure needs to be adequately protected from corrosion, and this is why we take special care of our structure. Depending on the design, the structure of your house will be either permeabilized or thoroughly coated for anti-corrosion protection.
Not to be forgotten is the fact that all the structures of our buildings are integrated into the building envelope, with no contact whatsoever with the environment or the elements.