most buildings in america today are wood frame, this is likely no better or worse. it is more important to consider what you put in the building, have a good electrician do the wiring, and design your layout and exits to fire code compliance.
>Is it firesafe?
>WikiHouse is not really any different from most kinds of 1-3 storey buildings with timber roof, floors, or internal walls, in that the building needs to be designed with adequate means of escape, and the chassis needs to be reasonably protected from catching fire. This can usually be achieved either with a plasterboard internal lining, by using a non-toxic fire protection coating, or by installing a basic sprinkler system.
>If you are building several adjacent houses, located close together in a row, you will usually need to use an external fire barrier material to prevent fire spreading from one building to the next.