Speed Breaker Dimensions and Specifications
RK-10
RK-18
RK-36
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 two
part 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.
