Walers and Hydraulic Vertical Shores Combine to Provide Optimal Shoring Solution
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Coble Trench Safety and safety specialist, John Knighten, assist contractor in design of a hydraulic vertical shoring and waler system to meet specific excavation requirements.

The Specifics
The excavation was set to be approximately eight feet in depth by five feet wide and twelve feet in length. The excavation would be part of a project to create a storm catch drain that was being constructed as part of a new shopping center along a road-side.

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The Scenario
The goal of this project was to efficiently and cost effectively shore the excavation so that the workers could complete the job quickly and safely. The site's main restriction was the small space surrounding the excavation. Due to the conditions of the site, only small equipment would be able to set the trench shoring in place. This restriction eliminated several common options such as large steel trench shields. Since the excavation wasn't completely linear and contained curves, it created a situation in which two types of shoring would likely have to be used to efficiently address both situations.

The Solution
The tight quarters of the site eliminated many common methods of shoring an excavation. A combination of hydraulic vertical shoring and walers proved to be the optimal system in this scenario. Walers and vertical shoring are extremely lightweight equipment that can be easily installed. The walers allow the contractor to shore up the straight portions of the trench easily and with little time spent installing the equipment, allowing them to focus on the job. The curvature of the excavation necessitated the use of hydrauliClick on picture for larger versionc vertical shoring. Hydraulic vertical shoring works great in this type of condition, because it can contour to the curves in the excavation and provide the vital shoring that is needed for the excavation.

Through cooperation and an accurate analysis of the situation the contractor and Coble Trench Safety were able to accomplish several goals. The contractor had a system that could be set up easily and quickly, allowing more time devoted to the labor of installing the electrical duct, while also being cost effective on the shoring. Most importantly the system would safely protect the laborers working in the trench from a trench collapse.