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.
What are the precautionary measures taken for deep excavation?
Safety Precaution while Excavation Work:
Avoid work in rainy season. The nail should not be lying around, after the completion of layout work. Barricade the site to restrict the entry of animal and the unauthorised person on site. Ensure that workers are wearing personal protective equipment.
What are the safety precautions for excavation?
Avoid underground services and make sure not to undermine nearby structures – use safe digging practice and dig away from them. Check the excavation each day before starting work and after any event that may affect its stability. Provide safe access to get in and out. Prevent collapse – shore, bench, or batter back.
What precautions must be taken during excavation on a construction site?
How is Excavation Done Safely?
- Inspect trenches daily before work begins. …
- Check weather conditions before work, be mindful of rain and storms.
- Keep heavy equipment away from trench edges.
- Be mindful of the location of utilities underground.
- Always wear proper protective equipment.
- Don’t work beneath raised loads.
What are two safety concerns regarding excavation work?
More excavation-related hazards
- falls into trenches or excavations.
- tripping over equipment, debris and spoil.
- excavated material or other objects falling on workers.
- exposure to underground services or overhead electrical cables.
- unstable adjacent structures.
- mishandled or poorly placed materials.
What are the three methods of excavation?
Types of excavation
- 3.1 Cut and fill excavation.
- 3.2 Trench excavation.
- 3.3 Basement excavation.
- 3.4 Road excavation.
- 3.5 Bridge excavation.
- 3.6 Dredging.
- 3.7 Over excavation.
What are the important precautions for confined space?
An important step in determining the hazards in a confined space is air testing.
Air quality testing
- The oxygen content is within safe limits – not too little and not too much.
- A hazardous atmosphere (toxic gases, flammable atmosphere) is not present.
- Ventilation equipment is operating properly.
What are the types of excavation?
Types of Excavation
- Earth excavation is removal of the layer of soil immediately under the topsoil and on top of rock. …
- Muck excavation is removal of material that contains an excessive amount of water and undesirable soil. …
- Unclassified excavation is removal of any combination of topsoil, earth, rock, and muck.
What are some dangers of excavation?
Top 5 excavation safety hazards
- Cave-ins. Trench collapses kill an average of two workers every month, making this a serious threat to worker safety. …
- Falls and falling loads. Workers and work equipment can fall into an excavated area. …
- Hazardous atmospheres. …
- Mobile equipment. …
- Hitting utility lines.
What are the risk of excavation?
There are a range of health and safety risks associated with excavation work including: falls from one level to another. the fall or dislodgement of earth or rock. vibration and hazardous noise.
What is the difference between excavation and trenching?
OSHA defines an excavation as any man-made cut, cavity, trench, or depression in the Earth’s surface formed by earth removal. A trench is defined as a narrow excavation (in relation to its length) made below the surface of the ground.
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.
How deep can you Excavation without shoring?
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.
Why are trenches dangerous?
Trenches literally are filled with a variety of potential safety and environmental hazards. Cave-ins perhaps are the most feared trenching hazard as one cubic yard of soil can weigh as much as a car. Asphyxiation due to lack of oxygen in a confined space is a major risk. So are inhalation of toxic fumes and drowning.
What depth is considered an excavation?
OSHA defines an excavation as “any man-made cut, cavity, trench or depression in the earth’s surface formed by earth removal.” A trench is “a narrow underground excavation that is deeper than it is wide, and is no wider than 15 feet.” The agency points out that 1 cubic yard of soil can weigh up to 3,000 pounds – …
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.