Rabu, 28 November 2012

Barrier installation: halfway mark for off-ramp closure

From ODOT-

We are more than halfway through the closure of the Interstate 5 northbound off-ramp to Franklin Boulevard. Crews have made significant progress toward building a new ramp.



The closure began early in October 2011 and gave us a chance to rebuild the off-ramp and raise it to align with the new northbound bridge.



Workers recently installed permanent barriers along the northbound lanes of I-5 and along the new northbound off-ramp to Franklin Boulevard. These barriers were precast, meaning they are formed and poured off-site and brought in from Salem for installation.




The construction team places one of the barriers on to the ramp, while others on the track await placement .

Crash tested and designed for impact, the barriers are hinged with a rod to form a durable chain, increasing the force the barrier can withstand. Carefully lined up with stormwater runoff grates, the walls also play a critical role in guiding water from the roadway into the drains below – a safety measure we all know is necessary here in rainy Oregon.




This portion of the roadway may open before shoulder paving is complete, so the construction team used single-slope barriers that do not need to be moved during paving.


With less than a year left for the ramp closure, crews are making steady progress and plan to remove the off-ramp falsework in February or March and will be ready to pave in the spring.

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