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F.7.6.1 Side Impact Zone - the region longitudinally forward of the Main Hoop and aft of the Front Hoop and vertically from 320 mm above the lowest point of the upper surface of the floor to the bottom surface of the floor of the monocoque
F.7.6.2 The Side Impact Zone must have a Buckling Modulus (EI) equal to three (3) Steel Tubes (F.3.2.1.e) that it replaces.
F.7.6.3 The portion of the Side Impact Zone that is vertically between the upper surface of the floor and 320 mm above the lowest point of the upper surface of the floor (see figure below) must have:
a. Buckling Modulus (EI) equivalent to two (2) Steel Tubes (F.3.2.1.e) per F.4.4
b. Absorbed energy equivalent to two (2) Steel Tubes (F.3.2.1.e).
Proof of equivalent absorbed energy is determined by physical testing per F.4.3.1 and
F.7.6.4 Half the horizontal floor must have a Buckling Modulus (EI) equivalent to one Steel Tube per
This must be proven by physical test completed per F.4.3.4 and the results included in the SES.