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A safety harness is a form of protective equipment designed to safeguard the user from injury or death from falling. The core item of a fall arrest system, the harness is usually fabricated from rope, braided wire cable, or synthetic webbing. It is attached securely to a stationary object directly by a locking device or indirectly via a rope, cable, or webbing and one or more locking devices. Some safety harnesses are used in combination with a shock-absorbing lanyard, which is used to regulate deceleration and thereby prevent a serious G-force injury when the end of the rope is reached.
An unrelated use with a materially different arresting mechanism is bungee jumping. Though they share certain similar attributes, a safety harness is not to be confused with a climbing harness used for mountaineering, rock climbing, and climbing gyms. Specialized harnesses for animal rescue or transfer, as from a dock to a vessel, are also made.
Safety harnesses have restraints that prevent the wearer from falling from a height. By wearing the belt or harness the risk of injury from a fall is greatly reduced. The harness allows the user to attach themselves to an object that is stationary, ensuring they will not hit the ground in the event of a possible fall. Falling from high areas is one of the most common causes of injuries in the workplace, so it is very important to make sure you are properly equipped when working up high.
Before safety harnesses were required by OSHA(The Occupational Safety and Health Administration), workers wore body belts to connect to fall protection systems. workers had the belts fastened around the waist, so unfortunately if they fell, the entire force would be exerted on the abdomen usually causing significant injury.
OSHA implementing this requirement really made sure the amount of casualties decreased from falling, as well as injuries caused from the old belts they used to wear. Safety harnesses are essential while working in high areas to prevent significant injury or death, and OSHA making these a requirement made everyone understand the importance of safety-harnesses
Standards
In North America, safety harnesses designed for protection against falls from heights in industrial and construction activities are covered by performance standards issued by the American National Standards Institute (ANSI) in the United States and by CSA Group (formerly known as the Canadian Standards Association) in Canada. Specifically, the standards issued are ANSI Z359.1, and CSA Z259.10. These standards are updated approximately every four to five years. The main purpose of the safety standards is to "act as a standard to drive best-in-class harnesses through rigorous design and test requirements. in addition to having requirements for manufacturers to create an ANSI-approved full body harness." The update to Z359.11 includes revisions and new requirements, including A modified, headfirst, dynamic test procedure, New stretch-out requirements for frontal connections, Alternative fall arrest indicator testing and new label requirements, Allowance for harnesses with integrated energy absorbers, and Changes to labeling requirements. It. requires harness label packs to have pictograms showing the approved usage of different connections and diagrams explaining the difference between deployed and non-deployed visual load indicators. These new standards help give the user a level a confidence, while knowing it has gone through rigorous testing to ensure that what you are using is completely safe and effective.
Classifications
There are four classes of fall protection systems:
Class 1 is body belts (single or double D-ring), designed to restrain a person in a hazardous work position, prevent a fall, or arrest it completely within 3 feet (90 cm) (OSHA). Class 2 is chest harnesses, used only with limited fall hazards (including no vertical free fall), or for retrieving persons, as from a tank or bin. Class 3 is full body harnesses, designed to arrest the most severe free falls. Class 4 is suspension belts, independent supports used to suspend a worker, such as boatswain's chairs or raising or lowering harnesses.
Other types
Other forms of safety harnesses include seat belts and child safety seats in cars, which are helping passengers be and feel more safe in a car, Over-the-shoulder restraints, which are mainly used on roller coaster at amusement parks, a seat with a full-body harness like ones used by fighter pilots and racing car drivers, as well as diving harnesses, which are used in surface supplied diving by professional divers.
Uses
Occupations that may involve the use of safety harnesses include:
A Window cleaner who can be working up high on buildings need to use harnesses to keep them from falling many stories if they slip. This is called a Fall arrest, which is the equipment which safely stops a person already falling. That is the most common safety harness. A Theatrical fly crew member will need a harness because they are up above the theater floor and they need to be safe incase they slip as well. Construction workers might need a harness because they could be building on the higher floors and without the harness they could fall to the ground. Crane operators will be at a height that will cause great injury or death if they were to fall off, so they need something to ensure their safety as they are working. A Lineman has to climb power lines and they need to be secured in place so they can work on the high voltage lines without moving around. Rock climbers use harnesses to belay each other, this is when they use a rope to connect to one another so if the climber falls they can catch them with the rope instead of falling all the way to the ground. This is called a Climbing harness, this is a device which allows a climber access to the safety of a rope. Motorsport keeps the driver secure in the event of a crash, keeping the driver secured in place gives the person more of a chance to leave without injury. Harnesses are used when Sailing to prevent the crew from being thrown overboard incase the seas are rough. Bungee jumping requires a harness to get the person to bounce back up, without it there would be no way to prevent the jumper from falling straight to the ground. A Professional diver would use a safety harness to keep close to something they are working on underwater, without the harness they could be pulled away from their work by a current. This is called a Lifeline (diving), which is a rope connecting the diver to an attendant, usually at the surface. This can also be called a Jackstay, which is a substantial line between two points used to guide or support.
References
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