Engineer’s Corner: The Major Entities Involved in Producing a Shoring System

November 1, 2017

Roles and Responsibilities This article looks at the roles of major players involved in producing a shoring system, as well as their responsibilities. One way to do this is by looking at risk and litigation when something goes wrong. In the United States all industries are subject to litigation, this ...

Site-Specific Shoring for Sink Hole and Replacement of Storm Sewer Line

November 1, 2017

A Northwest California contractor had been tasked to replace 96-inch storm drain which failed and created a sinkhole in a busy intersection. The project required a linear run of 133-ft with a width of 14-ft and a depth of 25-ft. The competent person on site classified the medium clay soil ...

Slide Rail System Provides Shoring For Sewer Infrastructure Upgrade

November 1, 2017

A South Carolina contractor was tasked with the construction of two new cast-in place structures to support existing and future sewer infrastructure. The new structures would be five-sided connecting to an existing 42-inch to a 54-inch sewer main with the second structure to be tied into a 64-inch sewer main.  The ...

Engineer’s Corner: OSHA Soil Types and Their Impact on Shoring Systems

September 16, 2017

In almost all cases, a Competent Person must first classify soil in accordance with the OSHA Appendix A Soil Classification prior to selecting open cut sloping or a manufacturer shoring system for a project. The appendix outlines three soil types in descending order of stability, Type A, Type B, and ...

Slide Rail System Used to Provide Deep Manhole Installation for Pump Station Project.

September 16, 2017

A coastal South Carolina contractor recently installed several manholes as part of a pump station improvement project. The excavation would require a linear run of 12-ft   with a width of 16-ft and a depth of 20-ft. The contractor on site classified the sandy soil as a Type C-80 soil. ...

Slide Rail System Provides Necessary Soil Support for Manhole Installation in Roadway

September 16, 2017

A utility contractor recently completed construction and installation of two new manholes between high traffic roadways. The contractor estimated the excavation for the first manhole needed to be 16-ft long and 16-ft wide excavated to a depth of 24-ft. The second manhole had a linear run of 20-ft with a ...

Engineer’s Corner: Trench Shield Inspection and Repair

August 11, 2017

It is well understood that the use of shoring equipment requires regular inspection and maintenance. Understanding how to inspect a shoring device, what needs to be focused on and how to make practical decisions about what is observed is not so clear.  Steel shoring shields have very long life times, ...

Slide Rail System Provides Positive Shoring Alongside DOT Roadway

August 11, 2017

A contractor had been tasked with setting a new manhole inlet tying into an existing 60 -in storm drain, which would ultimately help regulate storm water for toll roads.  The excavation would require a 12-ft square excavation to a depth of 16-ft in what the contractor had classified as a ...

Slide Rail System Used For Campus Infrastructure Project

August 11, 2017

A contractor was extending a drainage tunnel as part of infrastructure support for a growing Texas university.  The contractor would need to excavate 300 lineal feet to a depth of 12-ft and with a width of 16-ft to accommodate the 10-ft square drainage tunnel.  The contractor had classified the sandy ...

Engineer’s Corner: National Trench Safety Develops a New Lecture Series

July 17, 2017

OSHA Subpart P was promulgated starting in 1970 when Federal OSHA was established and adopted it as a “National Consensus Standard” in 1989. At that point it became a law that employers had to adhere to and could be cited for violating it. In my personal opinion, the standard has ...