I can add a little input to this thread that people my find interesting.
I owned one of the 10 syclones that Marlboro gave away. These trucks were built with a Kevlar/Carbon Fiber removable Targa Roof section.
All ten of the trucks were built by ASC and they all had to be DOT Legal. What I found interesting is some of the things they did.
A-Pillar on the Cab (windshield area ) was filled with liquid Steel.
A-Pillar from the floor up was plated with ?? guage steel ( couldn't tell )
B-Billar was also plated and that same thickness plate. It ran all the way across the roof and tied the roof and two pillars together.
The center support similar to a T-top roof was also plated with the same thickness steel going to the windshield.
The area above the windshield all the way across the top was also filled with liquid steel.
Doors pillars were filled with Liquid steel & plated.
For a truck that had a good chunk of it's roof removed it was rock solid.
So moving forward to my truck - Syborg
Dave (Compfab.com) suggested that we only do a 6 point cage for a street driven vehicle. Since I have no concern of passing tech the goal would be to stiffen the chassis and keep it from killing me in an accident.
The cage it welded to the floor above body mounts and also bolted to the chassis in 4 locations. It very easy to get in and out of this truck and in the event of a side impact the side-bar sits low enough that it should make contact with the seat and not my torso.
[IMG]http://www.syborgtwinturbo.com/albums/Build/2006_03_10_020.jpg
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