Flexibility Key As Contractor Copes With Uncertain Conditions
Click on picture for larger versionCoble Trench Safety shoring specialist Brett Sondergard plays a key role in assisting contractor with shoring design.

The Specifics

The contractor was charged with replacing a broken storm drain line 10 feet beneath an existing road.  The soil to be excavated would be a clay composite C-60 rating.  The area to be excavated would be approximately 16 feet long and 8 feet wide.  Several crossing utilities would be present once the area was excavated. 
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The Scenario
The primary challenge with the project would be shoring around the crossing utilities.  While the presence of the crossing utilities was known prior to digging, the exact location would not be known until the area had been excavated.  In addition, since the project would halt road traffic there was heavy pressure to finish the project very quickly. 


The Solution
Brett Sondergard met with the contractor initially to determine a preliminary game plan with regards to the excavation.  Since the crossing utilities placement would not be known until the excavation began, it wouldn't be possible to select a system until that point.  Nonetheless, the contractor knew that hydraulic vertical shoring would be the system of choice around the crossing utilities, coupled with a steel trench shield if crossing utility placement allowed.  Hydraulic vertical shores are very flexible and can be contoured to meet an excavation's specific needs and thus present perfect system when faced with most crossing utility applications. 

When the excavation began, Brett was on-site after the utilities were unearthed and assisted with the shoring design around the utilities.  After reviewing the shoring requirements with the superintendent, Brett scheduled the prompt delivery of the necessary sized vertical shores and a steel trench shield since there would be a long run uninterrupted by crossing utilities.  The communication throughout the project allowed Brett to slot a delivery to the jobsite location despite a lack of information regarding the exact equipment needs.  Additionally, Coble Trench Safety vast inventory of trench safety equipment ensured that whatever the equipment needs were for the project, it would be available. 

The contractor was very satisfied with the knowledge and ability of Coble Trench Safety.  Beyond the capability of the staff, the most impressive aspect of the project for the contractor was the speed of service and the flexibility to work around his needs. 

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