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.
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When a trench is 4ft or more in depth?
Access to and exit from the trench require the following conditions: ∎ Trenches 4 ft or more in depth should be provided with a fixed means of egress. travel more than 25 ft laterally to the nearest means of egress.
When a trench is more than 4 feet deep How far can the nearest egress access be?
25 feet
29 CFR 1926.651 (C)(2) MEANS OF EGRESS FROM TRENCH EXCAVATIONS A stairway, ladder, ramp or other safe means of egress (exit) shall be located in trench excavations that are 4 feet or more in depth so as to require no more than 25 feet of lateral travel for employees.
What is the depth of a trench?
A trench is defined as a narrow excavation (in relation to its length) made below the surface of the ground. In general, the depth of a trench is greater than its width, but the width of a trench (measured at the bottom) is not greater than 15 feet (4.6 m).
What is trench height?
As a general rule, the bottom vertical height of the trench must not exceed 4 ft (1.2 m) for the first bench. Subsequent benches may be up to a maximum of 5 ft (1.5 m) vertical in Type A soil and 4 ft (1.2 m) in Type B soil to a total trench depth of 20 ft (6.0 m).
What is the 1 2 depth RULE?
All simple slope excavations 20 feet or less in depth shall have a maximum allowable slope of 1½:1. 2. All excavations 20 feet or less in depth which have vertically sided lower portions shall be shielded or supported to a height at least 18 inches above the top of the vertical side.
At what depth of a trench does OSHA require fall protection?
5 feet
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.
What can be used to protect a trench 5 feet or more in depth?
The OSHA standard for trenching and excavation requires protective systems for trenches that are 5 feet or deeper, unless the excavation occurs in stable rock. Types of protective systems include sloping, shoring and shielding.
What is the minimum height above the side of the trench that a trench box wall should extend?
18 inches
Specifically, the trench shield extends 18 inches (0.45 m) above the vertical part of the walls, but is below the top of the trench. Therefore, where the top of the shield is below grade, it must extend a minimum of 18 inches above the vertical part of the wall.
What is the maximum depth that can be excavated below the bottom members of an excavation support system?
Excavation of material to a level no greater than 2 ft (0.6 m) below the bottom of the members of a trench support system (including a shield) shall be permitted, only if the system is designed to resist the forces calculated for the full depth of the trench and there are no indications while the trench is open of a
How deep can a trench be before shoring is required?
five feet deep
Depth of trench If the trench is five feet deep or more it must be shored or sloped. If there is a possibility of soil movement, even shallower trenches have to be shored. If you have doubt about it, shore/slope the trench.
What is considered a deep excavation?
Deep excavation is excavation that goes down more than 4.5m (or 15ft) deep into rock or soil. Excavations can range from shallow to deep and can be general or focussed.
At what depth must an excavation be supported?
For example, OSHA in the United States still specifies a depth that trench shoring must be used, which is currently 5 ft or 1.5 metres deep. However, if the trench is less than this depth, a competent person must determine if a protective system is required.
At what height must excavations be benched?
Benching and battering should be started at a depth of 1 metre. The rule is one metre up and one metre back.
What is meant by trenching?
What Does Trenching Mean? Trenching is a construction method that involves digging a narrow trench in the ground for the installation, maintenance, or inspection of pipelines, conduits, or cables.
What is the focus 4?
Keenan presented “OSHA’s ‘Focus 4’ Safety Hazards: Falls, Caught-In or Between, Struck-By Hazards and Electrocution” webinar, and said that it is important to consider a safety and health management system that contain the following elements: Management commitment and employee involvement; work site analysis; hazard
Why is 1.2 meter excavation confined space?
The 1.2m rule for trenches used to be in older health and safety regulations and is often still quoted today. The basis of the rule is that, if a trench is under 1.2m deep, then people can enter the trench without the sides of the excavation being supported or battered back.
When excavating to depths of 1.2 m or more what three methods are used to prevent cave-ins?
What are the different types of protective systems used to protect against cave-ins? There are two basic methods of protecting workers against cave-ins: Sloping. Temporary protective structures (e.g., shoring, trench boxes, pre-fabricated systems, hydraulic systems, engineering systems, etc.)
What is the 6 foot rule in construction?
The 6-foot rule. Subpart M requires the use of fall protection when construction workers are working at heights of 6 feet or greater above a lower level.
What is OSHA height requirements for fall protection?
OSHA requires that fall protection be provided at elevations of four feet in general industry workplaces, five feet in shipyards, six feet in the construction industry and eight feet in longshoring operations.
Do you need fall protection around a trench?
Under these provisions, if the trench is not readily visible because of plant growth or other visual barrier, fall protection is required.