Tim J KrahnTim J. Krahn, P. Eng. is a registered professional engineer and partner in Building Alternatives Inc., consulting engineers specializing in non-conventional structural and building envelope design. He holds a masters degree in geotecnical engineering, a bachelors degree in civil engineering, is a founding member of the Natural Building Engineering Group, and is the chair of the Ontario Natural Building Coalition. He currently resides in Ontario, Canada. Read More Read Less