WAC 204-10-036
Suspension. A motor vehicle must be
capable of stable, controlled operation while traversing a
slalom-type path passing alternately to the left and right of
at least four cones or markers arranged in a straight line and
spaced sixty feet apart at a minimum speed of 25 mph.
Body lifts are permitted provided that they are
manufactured by an aftermarket manufacturer, designed for the
make and model vehicle on which they are installed, and
installed according to the manufacturer's recommendations.
Body lifts may not use more than a three-inch spacer and may
not raise the body more than four inches above the frame when
all components are installed.
A motor vehicle must:
(1) Have a minimum ground clearance to allow the vehicle
to be in motion on its four rims on a flat surface with no
other parts of the vehicle touching that surface and a maximum
ground clearance determined based on the table contained in
WAC 204-10-022 (6)(f) bumpers.
(2) Have spring mounts and shackles properly aligned and
of sufficient strength so as to support the gross weight of
the vehicle and provide free travel in an up and down movement
under all conditions of operation.
(3) Incorporate antisway devices to control lateral
movement in rear coil spring suspension systems.
(4) Have a suspension system that allows movement between
the unsprung axles and wheels and the chassis body.
(5) Be equipped with a damping device at each wheel
location. The dampening device must stop vertical body motion
within two cycles when any corner of the vehicle is depressed
and released.
(6) Be capable of providing a minimum relative motion of
plus and minus two inches.
(7) Not use heating or welding for coil springs, leaf
springs, or torsion bars.
(8) Not be constructed or loaded so that the weight on
the wheels of any axle is less than thirty percent of the
gross weight of the vehicle.
(9) Not raise or lower the height of a motor vehicle
while the motor vehicle is traveling more than 15 mph on a
public roadway with a posted speed limit of 25 mph or less.
Except when lawfully participating in a parade permitted by
local jurisdiction.
(10) At no time have any portion of any tire of such
motor vehicle leave the surface of the roadway.
(11) Not have any portion of the vehicle or component of
the hydraulic system used to raise or lower the vehicle cause
or emit sparks.
Nothing in this section shall prohibit a county or city
from enacting stricter regulations for aftermarket vehicle
hydraulics on a public roadway.
[Statutory Authority: RCW 46.37.005 and 46.37.320. 08-19-079, § 204-10-036, filed 9/16/08, effective 10/17/08.]