What part of the foot does the steel shank in turnout boots protect?

The steel shank in turnout boots is designed to protect the bottom of the foot. This area is crucial as it faces the ground and is most susceptible to punctures and impacts from sharp objects, debris, or hazardous materials encountered while fighting fires or during rescue operations. The inclusion of a steel shank provides support and adds an extra layer of protection, ensuring that any pressure or sharp objects do not penetrate through to the foot. This safety feature is essential for firefighters who often work in challenging and unpredictable environments, where foot injuries can occur due to various hazards on the ground.

While the toe, side, and top of the boot are important areas that also require protection and are typically reinforced in turnout boots, the specific function of the steel shank is to enhance the structural integrity and safety of the boot's sole, thereby directly protecting the bottom of the wearer's foot.