Shoring is a dangerous business. According to the Occupational Safety and Health Administration (OHSA), 25 workers die in a trench-related accident every year. The OSHA also articulates that the walls […]
Soil Pressure and the Angle of Internal Friction
The angle of internal friction of soil is something that can be overlooked, but one that can be easily explained is rather simple. We encounter it when we see a […]
Soil Composition and Influence
Soil – aka “dirt”is a particulate material. This means it is composed of an assortment of individual particles which can be sorted into 4 basic groups: sand, silt, clay and […]
OSHA Trench Box Rules Roll Off Protection (The “18 Inch Rule”)
The Myth: One very common misconception among contractors is that any protective system is required to extend at least 18 inches above the top of the trench. Although many of […]