The drivers door bar is mandatory and can be any size.  The other bars may only be configured as shown in the
photo.  The dash bar is from post to post and can't exceed 3 inches in diameter.  The seat bar must attach to
the floor on the passengers side and can't exceed 3 inches in diameter. Pieces of plate, 6 x 6 maximum, may be
used to facilitate bar attachment to the interior of the car.  Front passenger door may be completely welded.
Jim Bridger Days Demolition Derby Rules and Information

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