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QUEST
Purpose: The QUEST is an end treatment limited to temporary applications. This system is designed to shield hazards 2 feet or less in width.
Description: The system consists of two front anchor assemblies; a nose assembly containing an integrated trigger assembly; two shaper rail assemblies; a support rail assembly with two energy absorbing tube shapers; a diaphragm assembly; a bridge assembly; two rear rails; a freestanding backup assembly; and W-beam fender panels. Transition panels are required when traffic approaches from the rear of the unit.
Function: During head-on impacts, the Quest system telescopes rearward and energy is absorbed through momentum transfer, friction, and deformation. When impacted from the side, the QUEST System restrains lateral movement by dynamic tension developed between the end restraints.
Foundation: The system is installed
on a concrete or asphalt foundation. (See
manufacturer’s installation requirements
for details.) The unit is attached to the road
surface with 30 to 34 anchors.
Slope: 12H:1V (8%) or flatter slope
between the edge of the traveled way and the
near face of the unit is required. In addition,
if the slope varies (twists) more than 2% over
the length of the system, a concrete leveling
pad may be required.
Manufacturer/Supplier: Energy Absorption Systems
