SPECIFICATIONS
GENERAL
Design specifications are based on the
RK-10, RK-18 and RK-36 preformed speed
breakers as manufactured by Road Kare
International, 530 Jesse Street, Grand
Prairie, TX 75051; Phone (800)
942-9305.
In order to consistently meet the
following specifications, the speed
breakers shall be manufactured in the
USA by an ISO 9002 approved company.
Other manufacturers may be approved with
prior approval from architect/engineer.
DIMENSIONS
The speed breaker shall be modular in
design with the standard length being
6′. Additional sections can be added in
2′ increments to desired length. Fixed
size speed breaker substitutes shall not
be accepted.
RK-10 is
designed to reduce vehicle speed to
less than 10 mph. Each module of
the RK-10 is 10″ W x 2′ L x 2 1/8″
H. Center module has one reflective
yellow “X” molded-in marking. End
module is tapered at the end with
one reflective yellow molded-in “X”
marking.
RK-18 is
designed to reduce vehicle speed to
less than 15 mph. Each module of
the RK-18 is 18″ W x 2′ L x 2 1/4″
H. Center module has two unique
shaped 8″ reflective molded-in
yellow chevrons facing opposite
directions. End module is tapered
at the end with one
reflective molded-in yellow diamond
to indicate the end of the speed
breaker.
RK-36 is
designed to reduce vehicle speed to
less than 20 mph. Each module of
the RK-36 is 36″ W x 2′ L x 2 1/2″
H. Center module has two unique
shaped 12″ reflective molded-in
yellow chevrons facing opposite
directions. End module is tapered
at the end with one
reflective molded-in yellow diamond
to indicate the end of the speed
breaker.
MATERIAL
The speed breaker modules shall be made
from 100% recycled rubber and a
polyurethane binder making the speed
breaker impervious to motor fuels, oils,
solvents, road salts and outdoor
environment. The rubber shall be
obtained from recycled truck and tractor
tire treads only (which is all rubber as
compared to car tires which contain
synthetic rubber). The rubber, in fiber
form up to 1/2″ long, shall contain no
rubber dust, granules or fly that will
weaken the final product. They shall be
compression molded and have the
following properties:
- Shore A
Hardness: 65 minimum
- Specific
Gravity: 1.13
- Skid
Resistance: 89 (dry)
- Tensile
Strength: 500 psi minimum
- Deform
Rate: None (100% recovery after
compression)
All shall be black
in color with all markings made of
pavement marking tape and molded into
the rubber for long term durability.
Markings that are painted on or applied
with adhesives shall not be acceptable.
WARRANTY
RK-10, RK-18 and RK-36 preformed speed
breakers and markings are guaranteed for
2 years under normal use when installed
according to manufacturer’s
specifications.
RK-36