Quote Originally Posted by GTIspirit View Post
The crushbox/pedestal has a flat surface of the same thickness as a floorplate, right? I've always wondered, what's to prevent the tube from punching through the flat surface of the crushbox?


The trick is to tie the box into multiple surfaces. You get more weld area and can connect to the sills and other panels that are thicker than the floor. And in my experience, the sheet used for boxes (this is Competition Cages in Hillsborough, NC) is way thicker than floor material.



EDIT - another shot, different car, same cage builder.

K