<p>California Route 91 offered a time-sensitive challenge to contractor ERSI and its Sandvik hydraulic hammer Rammer 4099.</p>
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California Route 91 offered a time-sensitive challenge to contractor ERSI and its Sandvik hydraulic hammer Rammer 4099.

Deadline defeated

With the help of Sandvik hydraulic hammer Rammer 4099, contractor ERSI beat the expected completion date by 11 hours.

California State Route 91 is one of the enormous freeways that run through Southern California. When the Route 91 corridor in the city of Corona was widened, a key part of the project was to demolish a sizeable highway overpass. The challenge was to do it without ever completely shutting down the highway, meaning there was no room for unplanned downtime.

The contractor, Environmental Remediation Services Inc (ERSI), selected Sandvik hydraulic hammer Rammer 4099 for the project. The power-to-weight ratio and reputable performance in combination with the operator-friendly environment were important parameters in the selection.

“We were working Rammer 4099 in high-elevation scenarios for a solid 22 hours,” says Glenn Beam, on-site ERSI superintendent. “It performed extremely well.”

ERSI managed to simultaneously build back the structure and open new lanes during the demolition process. The project beat the anticipated completion date and opened up the freeway 11 hours ahead of schedule.