Protection shall be provided by placing and keeping such materials or equipment at least 2 feet (. 61 m) from the edge of excavations, or by the use of retaining devices that are sufficient to prevent materials or equipment from falling or rolling into excavations, or by a combination of both if necessary. Inspections.
What is the minimum distance material and equipment should be kept from the edge of an excavation?
Keep excavated soil (spoils) and other materials at least 2 feet (0.6 meters) from trench edges. Know where underground utilities are located before digging. Test for atmospheric hazards such as low oxygen, hazardous fumes and toxic gases when > 4 feet deep.
What is the approach distance to a trench for heavy equipment?
The material must never be closer than one metre (three feet) from the edge of the excavation, and should be placed as far away as possible so it does not affect the structural stability of the walls. What is the approach distance to a trench for heavy equipment? 2 feet (0.61 meters) from trench edges.
How far away from an excavation should spoils be placed?
Set spoils and equipment at least 2 feet back from the excavation. the trench to prevent equipment and spoils from falling back into the excavation.
What is the minimum safe distance to keep excavated from trenches?
distance of not less than the depth of the trench or at least 6 m away from excavated sides for trenches deeper than 5m. With the use of power shovels, the banks of trenches become unstable and thus dangerous for the persons working nearby. These conditions should be watched and suitably remedied.
What is the minimum distance from the edge of an excavation to the spoil pile?
One metre from the edge to the toe of the spoil pile is the minimum distance required (Figure 31-4). The distance should be greater for deeper trenches.
What is the safest way of entering and exiting a deep excavation?
Prevent people and materials falling in – with barriers strong enough not to collapse if someone falls against them. Keep plant and materials away from the edge. Avoid underground services – use relevant service drawings, service locating devices and safe digging practice. Provide ladder access to get in and out.
What are 3 main protection methods against cave ins?
To prevent cave-ins: SLOPE or bench trench walls. SHORE trench walls with supports, or. SHIELD trench walls with trench boxes.
When a trench is 4 feet or more in depth?
Means of egress from trench excavations. A stairway, ladder, ramp or other safe means of egress shall be located in trench excavations that are 4 feet (1.22 m) or more in depth so as to require no more than 25 feet (7.62 m) of lateral travel for employees. Exposure to vehicular traffic.
At what depth of a trench does OSHA require fall protection?
Each employee at the edge of a well, pit, shaft, and similar excavation 6 feet (1.8 m) or more in depth shall be protected from falling by guardrail systems, fences, barricades, or covers.
What needs to be done before you start to excavate?
What you should do before you begin an excavation?
- Identify the soil type(s) related to the excavation or trench you are going to dig. …
- Look for the legislative requirements that apply in your jurisdiction and the type of protective measures to be taken.
- Locate all buried services.
What is the name of an excavation that is deeper than it is wide?
A trench is a type of excavation or depression in the ground that is generally deeper than it is wide (as opposed to a wider gully, or ditch), and narrow compared with its length (as opposed to a simple hole or pit).
What is benching in excavation?
“Benching (Benching system)” means a method of protecting employees from cave-ins by excavating the sides of an excavation to form one or a series of horizontal levels or steps, usually with vertical or near-vertical surfaces between levels.
At what depth is a trench considered a confined space?
In general practice, all trench excavations over four feet in depth should be considered confined spaces until a competent person has ruled out all of the potential hazards associated with it.
How deep can a trench be without shoring?
How Deep Can a Trench Be Without Shoring? Trenches with a depth of 5 feet (1.5 meters) or greater need a protective system unless the entire excavation is in stable rock. If there is anything less than 5 feet, it is up to a competent person’s discretion to determine if there is a need for a protective system.
Is code for deep excavation?
4.13 No excavation or earthwork below the level of any foundation of building or structure shall be commenced or continued unless adequate steps are taken to prevent danger to any person employed, from collapse of the structure or fall of any part thereof.