Trench

the United States. The Mariana Trench, in the Pacific Ocean, is the deepest location on Earth. According to the Exclusive Economic Zone (EEZ), the United States has jurisdiction over the trench and its resources. Scientists use a variety of technologies to overcome the challenges of deep-sea exploration and explore the Trench. Does the US own […]

The Mariana Trench was formed through a process called subduction. Earth’s crust is made up of comparably thin plates that “float” on the molten rock of the planet’s mantle. While floating on the mantle, the edges of these plates slowly bump into each other and sometimes even collide head-on. Is there a place deeper than […]

What Is An Oceanic Trench And Which Are The Deepest Oceanic Trenches In The World? Rank Name Location 1 Challenger Deep Izu-Bonin-Mariana Arc, Mariana Trench, Pacific Ocean 2 Tonga Trench Pacific Ocean 3 Galathea Depth Philippine Trench, Pacific Ocean 4 Kuril-Kamchatka Trench Pacific Ocean Where are the trenches located in the world? There are about […]

HISTORIC DIVE Because of its extreme depth, the Mariana Trench is cloaked in perpetual darkness and the temperature is just a few degrees above freezing. The water pressure at the bottom of the trench is a crushing eight tons per square inch—or about a thousand times the standard atmospheric pressure at sea level. What are […]

Trenching This is probably one of the most dangerous jobs out there for excavation workers. Trenching and excavation work accounts for 112% more fatalities than that of just general construction work. What is the most frequent cause of excavation fatalities? In the construction industry, excavation accidents that are most common occur due to “cave ins” […]

2 feet. In addition, the standards permit excavation of 2 feet (0.61 meters) or less below the bottom of the members of a support system, but 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 […]

Based on NIOSH statistics, an average of 60 workers die in cave-ins. What cave has the most deaths? The Shaft Sinkhole, Mount Gambier, Australia The shaft sinkhole might just be the most dangerous cave dive on the planet. How safe are caves? Caves are inherently dangerous environments, with many hazards we are not accustomed to […]

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 […]

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. When using a trench […]

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. When a trench […]

D2000Safety.com explains that when the walls of a trench cave in, the force of the collapse can be just as deadly as the actual weight of the soil. The average cubic yard of dirt weighs roughly 2,500 pounds, and when it falls from a height of six feet, it hits a worker moving at about […]

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 used for protection in a trench? To prevent cave-ins: SLOPE or bench trench walls. SHORE trench walls with supports, […]

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. When a trench is […]

There are four common types of trench collapse hazards: (1) the spoil pile slide, (2) the shear wall collapse, (3) the belly slough, and (4) the slip slide. Spoil Pile slides (figure 1) are very common and occur when dirt is piled too close to the edge of the trench. What is trench Collapse? A […]

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. At what depth do you need fall protection? 6 feetEach employee at the edge […]

Both employ aluminum rails and hydraulic cylinders that apply pressure to the walls of a trench, creating an “arching” effect in the adjacent soil that prevents the walls from collapsing. Trench Shields: Trench shields are aluminum or steel structures designed to protect workers by withstanding the forces of a cave-in. How do trenches collapse? A […]

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 purpose of trenching? In construction, trenches are dug for foundations of buildings, retaining walls and dams, and for cut-and-cover construction of tunnels. In […]

One of the biggest factors that impact how much an excavator can dig in one day is the unit’s bucket size, which typically ranges from 0.5 to 1.5 cubic yards of bucket capacity. Most common regular-size excavators have a 1 cubic yard bucket capacity, and mini excavators are closer to the 0.5 cubic yard capacity. […]

After soil is backfilled into a trench, the loose material is compacted using some mechanical means, such as a compactor, an excavator, or a “jumping jack”-type compactor. With the jetting technique, you pump the water under pressure and use the force of the jetted water to move the bedding or backfill material around. How do […]

Dump Truck Cubic Yardage – The Basics While there is room for variance, most full-size dump trucks have a capacity of between 10 and 16 cubic yards. How many cubic yards are in a 1 ton dump truck? “Cubic yards” are also used to measure the carrying capacity of dump trucks, as well as pounds […]