611.01 Description
This section describes the requirements for providing and cons tructing inertial barrier systems and compressive crash cushions. 310 611.02 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 th e 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 installa tion. 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 (CaCl 2) for salt. Place the lid on the module to ensure th at 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