Protective systems are methods of protecting workers from cave-ins of material that can fall or roll into an excavation, or from the collapse of nearby structures. As mentioned in earlier chapters, if an excavation is less than 5 feet deep, OSHA does not require a protective systems unless the competent person sees signs of a potential cave-in. (It is important to remember that a wall collapse in a trench four and 1/2 feet deep can still have serious results!) For trenches between 5 feet and 20 feet deep, shoring and sheeting, shielding, sloping and benching are all acceptable protective measures. It is up to the planners of the construction project and the competent person on site to determine which systems will work best. If an excavation is greater than 20 feet deep, a registered professional engineer must design the protective system.
Shoring systems are structures of timber, mechanical, or hydraulic systems that support the sides of an excavation and which are designed to prevent cave-ins.Sheeting is a type of shoring system that keeps the earth in position. It can be driven into the ground or work in conjunction with a shoring system. Driven sheeting is most frequently used for excavations open for long periods of time. Another type of sheeting, in which plates or shoring grade plywood (sometimes called Finland form) is used in conjunction with strutted systems such as hydraulic or timber shoring. These strutted systems are also referred to as active systems. The most frequently used strutted system involves aluminum hydraulic shoreswhich are lightweight, re-usable and installed and removed completely from above
Answer:
The answer is below
Explanation:
1) Equator: The equator is an imaginary line that divides the earth into two equal parts known as the northern hemisphere and southern hemisphere. The equator is a line of latitude.
Line A is the equator
2) Latitude: Latitude are imaginary lines on earth that run from the east to west.
Line B are lines of latitude
3) Longitude: Longitude are imaginary lines on earth that run from the north to south.
Line F is a line of longitude
4) Prime Meridian: The prime meridian is a 0° line of longitude. It serves as a reference for other lines of longitude measurement.
Line E is a prime meridian.
5) South pole: The south pole is at a latitude of 90°S and all the lines of longitude meet there.
Point D is the south pole
6) North pole: The north pole is at a latitude of 90°N and all the lines of longitude meet there.
Point C is the south pole
Answer:
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Answer:
Commission
Explanation:
The Great Comission can be found in Matthew 28 and Mark 16. It is the conmandment that Jesus gave to every Christian telling them to "go therefore and make disciples of all nations..." We, as Christians, believe that this is our ultimate job on this earth.
Car accelerates whenever its velocity is changed by either changing the speed or the direction of the car's motion. So, even if you are driving your car at a constant speed while turning around a corner, you are still accelerating.
