SECTION 611 – CRASH CUSHIONS
611.01 Description
This section describes the requirements for providing and constructing inertial barrie r systems and compressive crash cushions.
611.02 Materials
Provide materials as specified: Sand ................................ ................................ ................................ ................................ ........................ 901.06.02 Salt ................................ ................................ ................................ ................................ ............................... 919.09 Ensure that the sand has a dry density of 90 to 100 pounds per cubic foot and a 3 percent maximum allowable moisture content. The RE may require the Contractor to test the moisture content of the sand according to AASHTO T 255 and to submit certified test results. Provide an inertial barrier system listed on the QPL. Provide a compressive crash cushion as shown on the Plans.
611.03 Construction
611.03.01 Crash Cushion, Inertial Barrier System
Place each module in its location on the surface. Paint the outline of the base of the module on the surface and include the weight of the module inside the outline. Do not mix modules from different manufacturers in the same system. The RE may require the system manufacturer’s representative to be present during the installation. Fill each module with sand to the depth recommended by the manufacturer. Combine 5 to 7 percent of salt by weight and evenly disperse throughout the sand. Do not substitute calcium chloride (CaCl2) for salt. Place the lid on the module to ensure that no weather elements come in contact with the sand. Install 4 equidistant rivets or other fasteners, as recommended by the manufacturer and approved by the Department, on the periphery of the lid.
611.03.02 Crash Cushion, Compressive Barrier
At least 10 days before beginning the work, submit the manufacturer’s installation guide to the RE. Install compressive crash cushions including transitions according to the manufacturer’s recommendations and as shown on the Plans. Install permanent compressive crash cushions on a concrete pad foundation according to the manufacturer’s recommendation. Submit working drawings for the concrete pad foundation for each location.
611.04 Measurement and Payment
The Department will measure and make payment for Items as follows: Item Pay Unit CRASH CUSHION, INERTIAL BARRIER SYSTEM, ___ MODULES UNIT CRASH CUSHION, COMPRESSIVE BARRIER, TYPE ___, WIDTH ___ UNIT CRASH CUSHION, LOW MAINTENANCE COMPRESSIVE BARRIER, TYPE ___, WIDTH ___ UNIT
Crash Cushions in other states
Get an email when 611 changes
New Jersey revises spec sections through supplementals and new editions. We check this one every week and email you the day it changes. Free, no account.