2015-1-8_SCCA_Solo_Rules_book_online1

3. Vehicles
Overall Height-Average Track Width Relationship (1:1)
Overall Vehicle Height
(in)
70
65
60
55
50
45
Acceptable Range
45 50 55 60 65 70
Average Front/Rear Track Width (in)
center of gravity above the road (H) and can be calculated by the formula
SSF=T/2H. Vehicles with an SSF of less than 1.30 should not be
permitted to compete in Solo® events due to the higher risk of rollover.
B. Physically disabled drivers may use alternate vehicle controls and preparation
items appropriate for the nature of their disability. In the case
of a driver using alternate controls, extra care should be taken to ensure
that the driver does have adequate control of the vehicle and that the
control mechanisms can stand up to competition use. A waiver from the
SCCA® Solo® Department is required for the use of such equipment
in National Solo® events. Requests will be handled on a case-by-case
basis.
3.2 VEHICLE CLASSIFICATION
New car makes, types, and models will be classified by the SEB as soon as
sufficient information is available to do so. The SEB may reclassify a car
within the 12-month period following its initial classification, without the
approval of the Board of Directors. “Initial classification” includes the addition
of a new listing on an exclusion list.
3.3 VEHICLE SAFETY
3.3.1 Driver Restraints
Seat lap belts are required in all cars and must be installed in cars with
passive restraint systems that do not include a lap belt. Installation and
the use of shoulder belts or harnesses is strongly recommended; however,
non-factory upper body restraints may only be used in open cars, cars
with targa-tops in the open position, or cars with T-tops in the open position
when these two conditions are met:
A. The roll structure must meet either the requirements of Appendix C or
the SCCA® Club Racing General Competition Rules (GCR) Section 9.4.
B. The top of the roll structure may not be below the top of the driver’s
helmet when the driver is in the normal driving position.
34 — 2015 SCCA® National Solo® Rules