Corrugated Wall Aluminum Trench Shield and Hydraulic Vertical Shores Solve Contractor's Protective System Needs
Click on picture for larger versionCoble Trench Safety shoring specialist Casey Willett plays a key role in assisting contractor with shoring design.

The Specifics

The project required the repair of communication infrastructure within a residential area.  The excavation would be approximately 4 feet wide by 8 feet long and approximately 10 feet in depth in a C-60 sandy clay mixture.  The jobsite would be adjacent to a road.  Additionally, there was a power line pole adjacent to the excavation.
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The Scenario
The power line pole's presence presented a challenging obstacle that would restrict the operational performance of the crew to some extent, as well as the protective system, since there was unstable dirt on one end of the excavation surrounding the pole.  The project was under a very tight schedule with a sewer line scheduled for installation the next day.  In addition to these challenges, the protective system would also have to fall within the lifting capacity of a rubber tire backhoe on the jobsite. 


The Solution
Casey Willett met with the contractor to discuss the unique requirements of the project.  Working back from the necessary dimensions, Casey proposed protective systems options that would provide the requisite degree of protection on the project.  After discussions, the contractor elected to use a combination of a corrugated wall aluminum trench shield.  The corrugated wall aluminum trench shield would provide the shoring for the 8' long and 10' depth while also working within the lifting capacity of the rubber tire backhoe.  The aluminum trench shield would be rotated 90 degrees and installed on its side to provide the protection, which is permissible with manufacturer's tabulated data for the product.  The open sides of the shield would be shored with hydraulic vertical shores with finn form as the sheeting, which could easily be installed by two workers or light machinery. 

The equipment was delivered promptly and installed quickly with little difficulty.  The system was tailored to the jobsite of the customer and the unique set of restrictions affecting the system.  The contractor was very satisfied with the attention afforded by Casey to the project and ensuring the equipment was delivered when it was needed.

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