Rule Book at a Glance (FRAME)

RULE BOOK AT A GLANCE

FRAME

Elements of the Roll Cage

• The RRH must be a minimum of 73.6 cm (29 in.) wide at 68.6 cm (27 in.) above the driver’s seat (H-point of driver).
• The roll cage must be a space frame of tubular steel. The required members of the roll cage are:
  
  Primary members :
• Rear Roll Hoop (RRH)
• Roll Hoop Overhead Members (RHO)
• Front Bracing Members (FBM)
• Lateral Cross Member (LC) 
• Front Lateral Cross Member (FLC)
  
  Secondary members :
  must be steel tubes having a minimum wall thickness of 0.89 mm (.035 in) and a minimum outside diameter of 25.4 mm (1.0 in)
• Lateral Diagonal Bracing (LBD)
• Lower Frame Side (LFS)
• Side Impact Member (SIM)
• Fore/Aft Bracing (FAB)
• Under Seat Member (USM)
• All Other Required Cross Members
• Any tube that is used to mount the safety belts
• When minimal dimensions are given that is to the centerline of the members, and when a clearance for the driver is given, it is defined by the outside edges of the roll cage members less the padding installed
• Required dimensions between roll cage members are defined by measurements between member centerlines, except where noted.
• As of 2009 the engine has been an unmodified Briggs & Stratton Intek 20 single-cylinder with a displacement of 300cc and power output of approximately 10 bhp (7.5 kW).
• Difference between Pipe and Tube