Landracing Forum
Bonneville Salt Flats Discussion => SCTA Rule Questions => Topic started by: BIGREDTODD on November 02, 2010, 05:22:23 PM
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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
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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
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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
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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
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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