Tech Committee Bulletins on Cage Construction
Posted: Tue Feb 24, 2015 12:21 am
These "Recommendations" were deleted from the rules by vote of the 2015 Rules Meeting, and the consensus was reached to post them in a locked thread here. This post is a start on that:
. Recommendations for collision protection
1. Bend radii at least 3x tubing diameter, and continuous main hoop(s)
2. Mechanical tubing, as specified above is recommended for all collision protection and energy absorbing structures.
3. Tubing larger than specification, and /or additional diagonals & supports, are recommended.
4. 4 door bars are recommended, as are additional vertical supports, “intrusion” plating, and reinforcements of “X” joins, (i.e. “FIA”, “taco” gussets) in the door bar area, 2 continuous bars, and reinforcement to rocker or framerail, lateral reinforcement of rollcage mountings, framerails, or rockers (i.e. cross-members), and engagement of seat mountings in this reinforcement.
5. Windshield post support is recommended, as is a diagonal member in the roof, a vertical bar in the center of the windshield area, an anti-intrusion bar in the driver’s “window”, as well as 45 deg. sections in front frame rails and down tubes.
6. Cage installation should include significant structural enhancements and tie-in (i.e.
seam welding, gusseting, “fish” & floor plating, subframe connection, seat mount reinforcement, sill bars) to the cockpit area.
7. Cages should be tied in at as many points as possible (our rules specifically exempt safety equipment from class restrictions, but, other sanctions may specifically restrict this)
8. Entrants are urged to research specifications relevant to their particular car, and to it’s eligibility for other series, and to build to or above the highest specification available.