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The parking brake shall not be of a tire or wheel contact style (i.e. pad on tire or pad on rim styles are not considered as acceptable designs).
Parking Brake Specs
Assumptions
-5/32" disc thickness (3.9mm)
-8" rotor diameter
550kg total car mass (including ballasted driver & passenger)
Requirements
ASC:
Hold 10% of cars weight in fully loaded position on dry pavement
-Coefficient of friction car tire on asphalt = 0.72
WSC:
Hold car on a 20% incline or decline (approx. 11.3 degrees)