When trenches reach a depth of 5 feet or more, OSHA requires contractors to use a protective system. Protective systems are also required for trenches less than 5 feet deep if the soil might have the propensity to cave in when the trench is dug (such as with sand or mud).Jul 8, 2019
What are the OSHA requirements for trenches?
OSHA requires employers to provide ladders, steps, ramps, or other safe means of egress for workers working in trench excavations 4 feet (1.22 meters) or deeper. The means of egress must be located so as not to require workers to travel more than 25 feet (7.62 meters) laterally within the trench.
How deep before you need a trench box?
5 feet
How high should a trench box be above ground?
18 inches
How do trench boxes work?
Though not designed to prevent a trench wall from collapsing, trench boxes protect workers from the pressure and weight of soil in the event of a cave-in. Their walls are held apart by spreaders or panels to the desired width. The soil pressures and depth ratings on a trench box are determined by their designs.Dec 3, 2020
What is a trench box in construction?
A trench box is also known as a trench shield, sewer box, manhole box, or a tap box. It is used in the construction work. It provides stability to a trench and keeps the utility workers safe while they carry out their duties.
What are the OSHA requirements for a trench box?
Trenches 5 feet (1.5 meters) deep or greater require a protective system unless the excavation is made entirely in stable rock. If less than 5 feet deep, a competent person may determine that a protective system is not required.
Is a trench box considered a confined space?
A trench isn't considered a confined space except in these circumstances. A confined space has limited or restricted means of entry or exit and is not designed for continuous occupancy by a worker. Examples include tanks, underground vaults, manholes, tunnels, equipment housings, ductwork and pipelines.Mar 8, 2019
What is a construction trench box?
A trench box is also known as a trench shield, sewer box, manhole box, or a tap box. It is used in the construction work. It provides stability to a trench and keeps the utility workers safe while they carry out their duties. It is a two sided support system used in a mechanical excavation.
How far can a trench box be from the ground?
2 feet
Can you stack trench boxes?
As trenches get deeper, trench boxes can be stacked on top of one another to provide the necessary protection for workers. Each trench box must be designed to resist the pressure of the earth at the level where it's being used.Jul 8, 2019
Are job built trench boxes allowed?
Job-built trench boxes are never allowed in construction.