“The current code approved method for straw bale construction that can resist wind and seismic forces is not shown in the International Residential Code, IRC or the International Building Code, IBC.
However, it is shown as an appendix to some state residential code such as Oregon Residential code, appendix R, Straw-Bale Construction. The provision of this appendix is applicable to single family detached structures and related accessory structures as defined in Section R101.2, utilizing straw-bales in the construction of wall systems. So, if someone wants to build a straw bale home without the need to hire a licensed Engineer or Architect, he/she will need to check with their local building department to see if they have adopted the appendix.