4.14.4 Single Rolover Hoop with removable support members
The following vehicles require a single rollover hoop covering the full width of the driver's compartment with two back stays , a side intrusion bar and taxi bar of bolted construction using Grade 8 or equivalent fasteners constructed to ANDRA requirements as a MINIMUM ! ( Utilities may use a FOUR point rol cage with intrusion bars / diagonals on both sides ) .
Unmodified cars ( ET 10.00 - 10.99 ) : with nmodified monocoque construction with fixed steel roof , slower than 10.00 ( 1/4 ) / 6.50 ( 1/8 ) but faster than 10.99 ( 1/4 ) / 7.00 ( 1/8 ) .
My understanding of that is , UNtubbed = unmodified , therefore a Bolt in 4 point cage with Bolt in Side instrusion bar which is always on drivers side ?
So a back half cage with bolt in drivers side intrusion bar is required for Unmodified chassis/tubs .....
Hope that helps , but if in doubt , contact your local Andra Tech inspector for more info .
This is from the 2013 Andra rule book .
4.14. Full 6 Point Roll Cage with Removable Support Members .
The Following vehicles require a full roll cage mounted at a minimum of 6 points with removable side intrusion bars . The intrusion bars must be the same diameter and thickness as specified in the material selection chart and must be attached using 3/8 inch ( 10mm ) Grade 8 bolts as a minimum .
UNMODIFIED CARS ( et 8.00 - 9.99 ) . Street registered cars with a fixed steel roof and Unmodified monocoque construction running between 8.00 and 9.99 ( 1/4 ) / 5.00 and 6.25 ( 1/8 ) or slower .
So STREET Registered cars with FIxed Steel roof and UNMODIFIED chassis or tubs , ONLY needs BOLT in 6 point CAGE with BOLT in removable side intrusion bars .
WOW
SO basially you can keep your registered car with unmodified chassis / tubs , streetable with all seats available with some Hard Work of making a Bolt In 6 point cage !
Thats got to be appealling to alot of people ...
Thats cool .... DAMN cool