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F.6.2.1 Frame Members of the Front Bulkhead Support system must be constructed of closed section tubing meeting F.3.2.1.b
F.6.2.2 The Front Bulkhead must be securely integrated into the Frame.
F.6.2.3 The Front Bulkhead must be supported back to the Front Hoop by a minimum of three Frame Members on each side of the vehicle; an upper member; lower member and diagonal brace to provide Triangulation.
a. The upper support member must be attached 50 mm or less from the top surface of the Front Bulkhead, and attach to the Front Hoop inside a zone extending 100 mm above and 50 mm below the Upper Side Impact member.
b. If the upper support member is further than 100 mm above the Upper Side Impact member, then properly Triangulated bracing is required to transfer load to the Main Hoop by one of:
the Upper Side Impact member
an additional member transmitting load from the junction of the Upper Support Member with the Front Hoop
c. The lower support member must be attached to the base of the Front Bulkhead and the base of the Front Hoop.
d. The diagonal brace must properly Triangulate the upper and lower support members
F.6.2.4 Each of the above members may be multiple or bent tubes provided the requirements of F.5.2
are met.
F.6.2.5 Examples of acceptable configurations of members may be found in the SES