Track inlaid in concrete question?

[Charlie B]

The measurements are here <!-- m --><a class="postlink" href="http://prr.railfan.net/standards/standards.cgi?plan=70100-B">http://prr.railfan.net/standards/standa ... an=70100-B</a><!-- m -->
you see they extend considerably into the ground, truly more than meets the eye.
Charlie