IMO this is the kind of stuff people worry about who don't really have any knowledge about wood structures. In some ways they're the safest and sturdiest choice, especially if you get any earthquakes in your region.
FWIW, if you are concerned about fire, you should be aware that it's really the contents of the house that pose the greatest risk. You can get to flashover temperatures in a matter of minutes before any of the wood structure is burning.
FWIW, if you are concerned about fire, you should be aware that it's really the contents of the house that pose the greatest risk. You can get to flashover temperatures in a matter of minutes before any of the wood structure is burning.