Roll cage mounting points for non-unibody roll cage

[BIGREDTODD]

Our subject is a 1962 F-100, that will be running in both E/PP and C/PP classes. Part of my task list is to install outriggers, for lack of a better term, on the sides of the frame rails for the roll cage to mount and/or weld to.

It seems that most of the discussion, and specific criteria given on the subject refer to unitized construction vehicles. My question has multiple parts:

1. Is theres a minimum/maximum allowable pad area for the cage to mount to?
2. Can the down tube be welded to a flange that is bolted to this outrigger?
3. Is there a minimum/maximum allowable distance required from the edge of the frame section for the cage to be welded/mounted?
4. Does the frame (factory open "C" channel) require boxing plates at locations receiving these mounts?

My initial plan is to weld formed 1/4" steel angles (with welded 1/4" gussets) to the side of the frame at all locations requiring down tubes. I plan to allow for a 6" x 6" horizontal surface for the cage fabricator/installer to work with. I had also considered machining holes on the vertical plane of the angle to allow for more weld area, if required or advantageous for strength.

Thanks for the advice!
Todd

[Dynoroom]

This is a question for the SCTA techs. We can give you our input but they have the final say so.

Go to www.scta-bni.org

[jimmy six]

IMO eventho the body/bed is a unibody the truck has a frame and the down tubes should be attached to them. My 1940 Chevrolet obviously has a frame but it too is insde of where I sat. Mounts as you described are also welded to the frame for roll bar mounting. I believe you are correct in your thinking and the practice of what you are describing is the normal. Not sure on the 6 x 6 but you may need to tie those together under the body I'm sure smaller ones would not. Steve Davies will respond to drawings and your calls...Good Luck

[BIGREDTODD]

Appreciate the input gents...I sent Steve an email. I'll post the answer I'm given in the event that someone else is looking for the same information for their build.

Todd

[SPARKY]

We will have the same issue  ---I looked at and was shown several pickups at WF.  I think we are going to use  4 verticals in the rear, one straight down to the frame and one near the side of the cab from the outside of the upper halo down untill a 45 will intersect  a 1/4 plate mounted on the outside of the frame rail. The tube will be cut at a 45 to be welded to the vertical frame plate. These to verticals will not be inline, so that diagonals and x braces will be possible across the back of the drivers compartment.. ymmv