The Body Structure of the 2011 Honda CR-Z is made up with 45% high-strength steel (590 MPa or above).
2011 Honda CR-Z Advanced Compatibility Engineering (ACE) body structure
Most likely you looked at the image above and asked why does the windshield interface matter during an extrication? The 2011 Honda CR-Z has a thin A-pillar design that measures 108.8 mm in minimal thickness to improve forward visibility. Why it really matters is the A-pillar get strength through the use of high-grade, high-tensile steel of class 780MPa.
Also make sure you read through Honda’s Emergency Response Guide ERG.
Source of images and information: Honda Media Newsroom