ROLL CAGES FOR ALL ORCi non CONTACT FORMULAS

 

As detailed below all ORCi Non contact formulae must construct the roll cage as detailed below.

 

No Alloy roll cage or part cages are allowed. The minimum steel roll cage protection you must have is one front hoop, one rear hoop, one rear hoop cross bar at shoulder height to mount seat support or a seat brace hoop as a seat support, three roof connecting bars, one dash cross bar going across the bottom of the window aperture to a maximum of 5 inches down. Also 1 25mm od or 2 10mm od tube bars from top to bottom bar on roll cage front window. Two D/S chicken bars plus two connecting bars, & two P/S chicken bars plus two connecting bars, & minimum 2 rear stay bars to the rear shock towers or floor but must terminate at least 4” from the rear panel (must be either Fig 2 or 2(a)). The lower bar on the drivers side (if horizontal) should be a minimum of 3” (76mm) above the sill bar and then from the bottom door bar to the top door bar must be a minimum of a 3” (76mm) gap. The roll cage hoop feet must be on a piece of 38 x 38 mm box section or roll cage tube, 2.5mm minimum thickness, connecting front and rear hoop feet welded to sill or floor. This bar will not be classed as a chicken bar. All joints must be welded over 90% of the joint unless as approved RACMSA cage is used. The cage must not protrude through the bulkhead with the following exception. It is permitted to support both turrets from the roll cage with the maximum material and gauge as the roll cage, but the shock absorber must not connect to it. All bars connected to the cage must be steel. The minimum thickness of the roll cage are 1¼" OD 10swg (3mm) tube 1½" OD 12swg (2.5mm) tube 1½" x 1½" 10swg (3mm) box iron. Front Windscreen bars no more than 5” from window surround. It is compulsory to have sill bars to join the A & B pillars of the roll cage and then the new door bars would weld onto these.

 

 

 

 

 

 

Corner gusset bars are included in the diagrams to be added as a means to add weight to the car if     necessary.

 

 

Last updated  10 January 2026 12:29