Tweet
Looking at the leval 3 TT rules I found this about roll cage construction.
11.3.5. Mounting Plates
A. Roll bars and braces must be attached to the frame of the car wherever possible. Mounting plates may be used for this purpose where desired.
B. In the case of cars with unitized or frameless construction, mounting plates may be used to secure the roll bar structure to the floor of the car. The important consideration is that the load be distributed over as large an area as possible. A backup plate of equal size and thickness must be used on the opposite side of the panel with the plates through-bolted together.
C. Mounting plates bolted to the structure shall not be less than .1875 (3/16) inch thick and the use of a back-up plate of equal size and thickness on the opposite side of the panel with the plates through-bolted together is recommended. A minimum of 3 bolts per plate is required for bolted mounting plates. Mounting plates welded to the structure shall not be less than .080 inch thick. Whenever possible the mounting plate should extend onto a vertical section of the structure such as a door pillar.
If I am reading this correctly on a unibody construction car you MUST use mounting plates with a back up plate of equal size on the opposite side of the panel bolted together. Am I reading this correctly or is it OK to just have mounting plates welded to the floor of the car. Fine if that is what we have to do but it will just make the construction a lot harder and Iwould hate to show up with the cage welded in such a way we could not add the lower plates if needed.
Thanks.
11.3.5. Mounting Plates
A. Roll bars and braces must be attached to the frame of the car wherever possible. Mounting plates may be used for this purpose where desired.
B. In the case of cars with unitized or frameless construction, mounting plates may be used to secure the roll bar structure to the floor of the car. The important consideration is that the load be distributed over as large an area as possible. A backup plate of equal size and thickness must be used on the opposite side of the panel with the plates through-bolted together.
C. Mounting plates bolted to the structure shall not be less than .1875 (3/16) inch thick and the use of a back-up plate of equal size and thickness on the opposite side of the panel with the plates through-bolted together is recommended. A minimum of 3 bolts per plate is required for bolted mounting plates. Mounting plates welded to the structure shall not be less than .080 inch thick. Whenever possible the mounting plate should extend onto a vertical section of the structure such as a door pillar.
If I am reading this correctly on a unibody construction car you MUST use mounting plates with a back up plate of equal size on the opposite side of the panel bolted together. Am I reading this correctly or is it OK to just have mounting plates welded to the floor of the car. Fine if that is what we have to do but it will just make the construction a lot harder and Iwould hate to show up with the cage welded in such a way we could not add the lower plates if needed.
Thanks.
Comment