There are different types of trenching. The first is an open trench where the sides are usually back-sloped, depending on the soil type. This trench may have steep walls for the majority of the excavation but includes "bell holes" where it anticipated that workers will need to enter the ...
One of the most beneficial and tricky devices used in specialty construction, trench boxes have obvious benefits. They can hold up their end in all types of soil conditions, but they can be a bear to install and move. Understanding best practices for use of these devices can save li...
Cave-in means the separation of a mass of soil or rock material from the side of an excavation, or the loss of soil from under a trench shield or support system, and its sudden movement into the excavation, either by falling or sliding, in sufficient qu ty so that it could entrap, ...
Soil types and testing Types of trench collapse Sloping and benching Aluminum hydraulic and timber shoring Alternatives to shoring Safe work practices All workers, employers, and supervisors whose jobs require them to be near excavation and trenching work will benefit from this informative one-hour co...
(.651(g)(1)how often should atmospheric testing be done in and around a 5' excavation trench in a confined space before employees enter (.501(b)(1) which of the following equipment is for the purpose of fall protection? harness