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Leftu turn sign

A No Through Road sign or a Dead End sign is used to indicate that the road ahead does not continue through to the other side, and drivers should not ...

This usually involves driving a ground rod to a suitable depth where the electricity can safely be discharged, rather than introducing current into the surrounding materials, equipment, or workers.

Under some circumstances, these devices can interfere with one another when using shared bands, affecting the performance of electronics.

For example, a hazardous gas symbol may alert workers to the potential presence of a harmful gas. But an accompanying sign mandating the use of a gas mask takes it a step further by telling workers how to handle the hazard.

You’re already familiar with this radiation symbol – if only because you’ve seen it so often in movies. But it’s not common in most worksites. It’s not even present everywhere there’s a radiation hazard. In some cases, like on some detectors using americium-241, you might find the generic GHS “health hazard” pictogram instead. Why? Because we tend to associate the symbol with major devastating catastrophes, which doesn’t always reflect the actual level of risk.

Jessica is a freelance writer and editor from Toronto, Canada. She specializes in creating content for nonprofits and has written for organizations working in human rights, conservation, education, and health care. She loves traveling and food, speaks Spanish, and has two dogs, one of whom she rescued while living in Mexico.

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Safety signs and symbols exist to make identifying potential hazards easier. Keep things simple by spreading signs out within an area to avoid clustering them. Too many signs crammed together overwhelms workers with information and makes it less likely that they pay careful attention.

The signage warns workers to avoid getting burned by coming into contact with the surface, but also that the surface is not a place to leave a jacket, stack of boxes, or anything that could cause a fire.

Be aware, however, that this is by no means a comprehensive list. This is a selection of the safety symbols for some of the major workplace hazard categories, but they might not be the only ones.

This placard is displayed wherever there are lasers that produce significant heat, could harm workers trying to peek inside the enclosures, or could cause harm when reflecting off other surfaces.

The biohazard symbol is used in WHMIS but is not an official GHS pictogram. Still, it remains prevalent because it is instantly recognizable and unambiguous.

Chances are, you’ll never actually see this one in your workplace. Not unless you work for a weapons manufacturer or on a military installation. Even then, only in certain countries – the development, manufacture, and retention of these agents is banned in over 190 states through the Chemical Weapons Convention.

At a normal crossroads with a median strip down the middle you are allowed to simply turn around and go back the other way, obviously giving way to ALL other traffic.

That being said, it still appears in some contexts, such as nondestructive testing (NDT), ammonia plants, nuclear power plants, and radiology.

U turnsigns offensive

In the diagram here, while presented as a crossroads, is representing both a left and a right intersection. If there is a Solid White Line as in the Left intersection (the Blue path) you would not be allowed to perform the U-Turn here. The Right intersection however shows a dotted line, even though it is a Stop sign, you would be allowed to perform a U-Turn here, except you would obviously be expected to Stop before proceeding across the line.

This symbol is often posted near cooktops, ovens, and other heat-generating appliances. It’s also useful on machinery casings, piping and conduits, and other surfaces that may become hot as a byproduct of their operation.

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These signs are so commonplace that we barely notice them in most places, but they become critical when the fire alarm goes off and you have to calmly make your way to the designated exit. Elevators disable when there is a fire, so these signs also discourage people from wasting time going to them instead of heading for the stairwell.

The system uses pictograms on labels to alert users of the chemical hazards they may be exposed to and helps contribute to chemical safety. Every symbol consists of a black pictogram on a white background, framed by a red border. There are nine different pictograms, each representing a different chemical hazard classification.

RightU turn sign

Since most workplaces have a combination of both, it’s important to understand each of them. Advertisement Why Use Safety Signs and Symbols? These pictures may not say a thousand words, but they are universally recognized symbols that transcend language. No matter where you’re working, you’ll be able to understand the potential hazards you face simply by looking at the posted symbols. The best occupational health and safety programs use a series of signs and symbols to convey a complete message. For example, a hazardous gas symbol may alert workers to the potential presence of a harmful gas. But an accompanying sign mandating the use of a gas mask takes it a step further by telling workers how to handle the hazard. Signs and symbols are no substitute for training, but they do serve as important reminders. They can be particularly helpful for workers who are not familiar with a specific area or process. A simple sign with a safety symbol allows workers to efficiently identify the potential hazard and make an immediate decision. Advertisement 4 Key Types of Safety Symbols Most safety signs and symbols fall into one of four categories: Prohibition Warning Mandatory Emergency Each category has its own specific color and sign shape that remains consistent around the world as per safety regulations. By getting to know the key characteristics of each type of symbol, you’ll be able to easily identify whether a sign is asking you to stop doing something, start doing something, take precautions, or advising you of emergency equipment or facilities. Category / Color Information / Instruction Features Examples Prohibition (Red) Dangerous behavior Stop Shutdown Emergency cut-out devices Evacuate Round shape Black pictogram on white background Red edging with a red diagonal line Do not touch No access for unauthorized persons Do not enter Warning (Yellow) Be careful Take precautions Hazard nearby Triangular shape Black pictogram on yellow background Black edging Electric shock Magnetic field Biological hazard General warning Mandatory (Blue) Specific behavior or action Round shape White pictogram on blue background Wear safety glasses Wash hands Use safety harness Emergency (Green) Doors Exits Escape routes Equipment and facilities Rectangular or square shape White pictogram on green background Emergency exit/escape route Eyewash station First aid kit   Want to overcome some major safety challenges? Check out our free whitepaper on What It Takes to Become an EHS Leader!   Hazardous Chemicals Communication Standards and Symbols Canada’s Workplace Hazardous Materials Information System (WHMIS) and OSHA’s Hazard Communication Standard (HCS) align with and draw on the Globally Harmonized System of Classification and Labeling of Chemicals (GHS). Using this international system helps ensure consistency in the classification of chemicals and the communication of hazard information on labels and safety data sheets. The system uses pictograms on labels to alert users of the chemical hazards they may be exposed to and helps contribute to chemical safety. Every symbol consists of a black pictogram on a white background, framed by a red border. There are nine different pictograms, each representing a different chemical hazard classification. Health Hazard Carcinogen Mutagenicity Reproductive toxicity Respiratory sensitizer Target organ toxicity Aspiration toxicity Flame Flammables Pyrophorics Self-heating Emits flammable gas Self-reactives Organic peroxides Exclamation Mark Irritant (skin and eye) Skin sensitizer Acute toxicity (harmful) Narcotic effects Respiratory tract irritant Hazardous to ozone layer Gas Cylinder Gases under pressure Corrosion Skin corrosion/burns Eye damage Corrosive to metals   Exploding Bomb Explosives Self-reactives Organic peroxides Flame Over Circle Oxidizers   Environment Aquatic toxicity   Skull and Crossbones Acute toxicity (fatal or toxic) Common Types of Safety Signs and Symbols of Note There are numerous safety pictograms that aren’t derived from the GHS but are still highly important.  Some of them will be familiar to most people. We all have a pretty good idea of the risks we’re facing when we see the Biohazard symbol, for instance.  Others aren’t so obvious. The symbols provide vital information about the hazards in your work environment, but unless you know what they mean, they won’t do much to keep you safe. So, let’s look at a selection of the signs, symbols, and pictograms you might encounter on the job and what they mean. Be aware, however, that this is by no means a comprehensive list. This is a selection of the safety symbols for some of the major workplace hazard categories, but they might not be the only ones.  Chemical Safety Signs and Symbols Ionizing Radiation This symbol signals the presence of ionizing radiation. This type of radiation is a significant hazard that has the potential to change the structure of molecules (including DNA) in such a way that it could disrupt normal cell functioning. In the right doses, ionizing radiation can cause germ cell damage, fetal damage, radiation sickness, or cancer.  You’re already familiar with this radiation symbol – if only because you’ve seen it so often in movies. But it’s not common in most worksites. It’s not even present everywhere there’s a radiation hazard. In some cases, like on some detectors using americium-241, you might find the generic GHS “health hazard” pictogram instead. Why? Because we tend to associate the symbol with major devastating catastrophes, which doesn’t always reflect the actual level of risk. That being said, it still appears in some contexts, such as nondestructive testing (NDT), ammonia plants, nuclear power plants, and radiology. Emergency Shower This sign marks the location of the emergency shower, something workers should be aware of when handling certain hazardous materials. These emergency showers aren’t just any spot where hazardous materials can be washed off. They are purpose-built showers that must be tested at regular intervals (depending on your jurisdiction, this can be pretty specific), must deliver a specified rate of flow for a minimum period, and must deliver tepid water instead of cold. In many workplaces, these showers are there “just in case” and don’t see regular use. This makes this symbol particularly important since it will guide workers who likely have never had to use them.  Biohazard This symbol indicates the presence of biologically harmful substances, such as infection agents, live viruses, bacteria, or mold.  The biohazard symbol is probably seen on a lot more t-shirts than worksites. But in certain applications (labs, pharmaceuticals, and medical facilities in particular), it continues to be an important health and safety warning. The biohazard symbol is used in WHMIS but is not an official GHS pictogram. Still, it remains prevalent because it is instantly recognizable and unambiguous.  Electrical Safety Symbols Live Electrical Equipment This symbol is displayed where there is powered electrical equipment that could deliver a shock. A similar symbol with a “flash” to the side indicates that the equipment also poses an arc flash risk. This basic symbol is usually accompanied by text, but knowing its meaning is still important – especially since the text is typically relevant in only one language. High Voltage or Shock Hazard Sometimes considered interchangeable with the basic lighting bolt symbol, this one communicates a more specific hazard. Namely, that the equipment can electrocute you. You’re likely to see this type of sign around transformers, power plants, power panels, and other high voltage electricity-channelling equipment. No one should enter into areas with this symbol unless they have been authorized and trained to do so. Connect Earth Terminal to Ground The ground symbol is used to indicate that a piece of equipment needs to be connected to “ground” or “earth.”  This usually involves driving a ground rod to a suitable depth where the electricity can safely be discharged, rather than introducing current into the surrounding materials, equipment, or workers. Sensitive Electronic Device These signs are commonly seen around electronics manufacturing facilities. They aim to protect the integrity of materials or partially assembled components. Such signage is displayed for work on containment areas that house components like circuit boards, which can be damaged or irreparably ruined by a simple static discharge.  The basic yellow and black warning pictogram alerts a worker that there is a condition that requires their attention. In this case: don’t touch anything unless you know what you’re doing! Fire Safety Symbols No Smoking This one might seem almost too obvious to include because it is so ubiquitous. It isn’t quite as prevalent as it once was, however. That’s because it used to be posted to denote the only places where smoking wasn’t permitted. Now, it’s largely been flipped so that smoking is only permitted in specially designated areas where second-hand smoke is unlikely to reach non-smokers.  Although smoking is generally not permitted in workplaces and public areas, you might still see this sign posted where lighting a cigarette might be especially risky (near gas pumps, for example).  In workplace settings, cigarettes, lighters, and other smoking implements are generally considered ignition sources for potentially flammable atmospheres or materials, especially since cigarettes can smolder for a long time after they’ve been discarded. Fire Exit / Evacuation Route This sign points the way out of a building or facility in the event of an emergency – which is not always the same way you came in. These signs are so commonplace that we barely notice them in most places, but they become critical when the fire alarm goes off and you have to calmly make your way to the designated exit. Elevators disable when there is a fire, so these signs also discourage people from wasting time going to them instead of heading for the stairwell.  Emergency evacuation signs are often illuminated so they can be visible in the dark or when smoke is filling the room.  Hot Surface This symbol is often posted near cooktops, ovens, and other heat-generating appliances. It’s also useful on machinery casings, piping and conduits, and other surfaces that may become hot as a byproduct of their operation.  The signage warns workers to avoid getting burned by coming into contact with the surface, but also that the surface is not a place to leave a jacket, stack of boxes, or anything that could cause a fire.  Gas Safety Signs and Symbols No Ignition Sources This symbol depicting a lit match is usually posted alongside No Smoking signs (most commonly at gas stations). It indicates that any ignition source has the potential to cause a fire. It may not be the most straightforward symbol, since it doesn’t apply only to matches, but to any source of ignition. Still, it is widely used and worth knowing. Gas Cylinder Storage Area These signs don’t have a standard style or dimensions. There are numerous versions of this symbol and they don’t always mean exactly the same thing.  This symbol is generally used where compressed gas bottles (such as oxygen and acetylene) are stored, which requires several safety considerations. At the very least, you should be using a spotter when operating vehicles around an outdoor storage area where this symbol is posted.  Respirator Required This symbol indicates that no work can take place in the area without the use of a respirator. You might see it, for example, on vessels that have the potential to expose workers to gases and vapors, develop an oxygen-deficient atmosphere, or house respirable particles like silica or asbestos. This is common in confined spaces, where isolation can’t be completely assured and gases could be introduced.  Poison Safety Symbols Chemical Weapon This symbol is used where either the precursor chemical or the full product is made or stored. Chances are, you’ll never actually see this one in your workplace. Not unless you work for a weapons manufacturer or on a military installation. Even then, only in certain countries – the development, manufacture, and retention of these agents is banned in over 190 states through the Chemical Weapons Convention.  Poison This classic skull and crossbones design denotes the presence of poison or toxic materials.  It’s the progenitor of the modern GHS symbol for acute toxicity, but is still used on some consumer products that don’t fall under workplace chemical regulations. Noxious / Irritant This simple X indicates the presence of irritating materials. This symbol is more commonly used in Europe. It is particularly useful where the irritant isn’t completely contained (in a paint booth, for example) and anyone entering the area may be exposed to it. Other Safety Symbols Stop / No Admittance / Authorized Personnel Only This ISO symbol acts as a general caution not to proceed any further. This type of sign is typically posted at the entrance to restricted areas (whether for safety or security reasons), but can also be used as a reminder for those who have clearance that they are entering an area with special safety observances (such as PPE or entrance logs). Non-Ionizing Radiation Non-ionizing radiation is generally considered harmless to humans, but you might still see this warning symbol around equipment that operates over communications protocols, such as transmitters, routers, and cellular antennae. Under some circumstances, these devices can interfere with one another when using shared bands, affecting the performance of electronics.  Laser This placard is displayed wherever there are lasers that produce significant heat, could harm workers trying to peek inside the enclosures, or could cause harm when reflecting off other surfaces. Lasers are used in numerous applications, from measurement, infrared sensing, guidance, cleaning, and design, all the way to industrial metal fabrication. As they are extremely focused forms of light, they can be harmful to humans, especially to the eyes.  Which Signs and Symbols Are Appropriate for Your Workplace? To know what symbols should be in your workplace, you’ll need to perform a comprehensive risk assessment. Assessments should be conducted for each activity and at each designated workspace to make sure you identify all potential hazards. Once you have that information, you’ll know where workers will need safety reminders. Note, however, that you might want to make sure the signs can be moved. After a while, workers become so familiar with the safety signs that they start to just be part of the background. To avoid this “sign blindness,” safety experts recommend switching up the location of your signs every so often to keep the safety message top of mind. Conclusion Safety signs and symbols exist to make identifying potential hazards easier. Keep things simple by spreading signs out within an area to avoid clustering them. Too many signs crammed together overwhelms workers with information and makes it less likely that they pay careful attention. And remember that safety signs only work if everyone understands them. Conduct regular refresher training to ensure that every worker is familiar with the symbols and their meanings. Ready to learn more? Check out our free on demand webinar on Building Credibility and Buy-In Within Your Organization! And sign up for the Safeopedia Newsletter to get lots more safety info delivered straight to your inbox! Related Terms Globally Harmonized System Pictogram Safety Symbols Interactive Safety Signs First Aid Sign Sign Blindness Short-Term Exposure Limit Hazard Dust Lower Explosive Limit Share This Article

Others aren’t so obvious. The symbols provide vital information about the hazards in your work environment, but unless you know what they mean, they won’t do much to keep you safe.

This symbol indicates the presence of biologically harmful substances, such as infection agents, live viruses, bacteria, or mold.

The best occupational health and safety programs use a series of signs and symbols to convey a complete message. For example, a hazardous gas symbol may alert workers to the potential presence of a harmful gas. But an accompanying sign mandating the use of a gas mask takes it a step further by telling workers how to handle the hazard. Signs and symbols are no substitute for training, but they do serve as important reminders. They can be particularly helpful for workers who are not familiar with a specific area or process. A simple sign with a safety symbol allows workers to efficiently identify the potential hazard and make an immediate decision. Advertisement 4 Key Types of Safety Symbols Most safety signs and symbols fall into one of four categories: Prohibition Warning Mandatory Emergency Each category has its own specific color and sign shape that remains consistent around the world as per safety regulations. By getting to know the key characteristics of each type of symbol, you’ll be able to easily identify whether a sign is asking you to stop doing something, start doing something, take precautions, or advising you of emergency equipment or facilities. Category / Color Information / Instruction Features Examples Prohibition (Red) Dangerous behavior Stop Shutdown Emergency cut-out devices Evacuate Round shape Black pictogram on white background Red edging with a red diagonal line Do not touch No access for unauthorized persons Do not enter Warning (Yellow) Be careful Take precautions Hazard nearby Triangular shape Black pictogram on yellow background Black edging Electric shock Magnetic field Biological hazard General warning Mandatory (Blue) Specific behavior or action Round shape White pictogram on blue background Wear safety glasses Wash hands Use safety harness Emergency (Green) Doors Exits Escape routes Equipment and facilities Rectangular or square shape White pictogram on green background Emergency exit/escape route Eyewash station First aid kit   Want to overcome some major safety challenges? Check out our free whitepaper on What It Takes to Become an EHS Leader!   Hazardous Chemicals Communication Standards and Symbols Canada’s Workplace Hazardous Materials Information System (WHMIS) and OSHA’s Hazard Communication Standard (HCS) align with and draw on the Globally Harmonized System of Classification and Labeling of Chemicals (GHS). Using this international system helps ensure consistency in the classification of chemicals and the communication of hazard information on labels and safety data sheets. The system uses pictograms on labels to alert users of the chemical hazards they may be exposed to and helps contribute to chemical safety. Every symbol consists of a black pictogram on a white background, framed by a red border. There are nine different pictograms, each representing a different chemical hazard classification. Health Hazard Carcinogen Mutagenicity Reproductive toxicity Respiratory sensitizer Target organ toxicity Aspiration toxicity Flame Flammables Pyrophorics Self-heating Emits flammable gas Self-reactives Organic peroxides Exclamation Mark Irritant (skin and eye) Skin sensitizer Acute toxicity (harmful) Narcotic effects Respiratory tract irritant Hazardous to ozone layer Gas Cylinder Gases under pressure Corrosion Skin corrosion/burns Eye damage Corrosive to metals   Exploding Bomb Explosives Self-reactives Organic peroxides Flame Over Circle Oxidizers   Environment Aquatic toxicity   Skull and Crossbones Acute toxicity (fatal or toxic) Common Types of Safety Signs and Symbols of Note There are numerous safety pictograms that aren’t derived from the GHS but are still highly important.  Some of them will be familiar to most people. We all have a pretty good idea of the risks we’re facing when we see the Biohazard symbol, for instance.  Others aren’t so obvious. The symbols provide vital information about the hazards in your work environment, but unless you know what they mean, they won’t do much to keep you safe. So, let’s look at a selection of the signs, symbols, and pictograms you might encounter on the job and what they mean. Be aware, however, that this is by no means a comprehensive list. This is a selection of the safety symbols for some of the major workplace hazard categories, but they might not be the only ones.  Chemical Safety Signs and Symbols Ionizing Radiation This symbol signals the presence of ionizing radiation. This type of radiation is a significant hazard that has the potential to change the structure of molecules (including DNA) in such a way that it could disrupt normal cell functioning. In the right doses, ionizing radiation can cause germ cell damage, fetal damage, radiation sickness, or cancer.  You’re already familiar with this radiation symbol – if only because you’ve seen it so often in movies. But it’s not common in most worksites. It’s not even present everywhere there’s a radiation hazard. In some cases, like on some detectors using americium-241, you might find the generic GHS “health hazard” pictogram instead. Why? Because we tend to associate the symbol with major devastating catastrophes, which doesn’t always reflect the actual level of risk. That being said, it still appears in some contexts, such as nondestructive testing (NDT), ammonia plants, nuclear power plants, and radiology. Emergency Shower This sign marks the location of the emergency shower, something workers should be aware of when handling certain hazardous materials. These emergency showers aren’t just any spot where hazardous materials can be washed off. They are purpose-built showers that must be tested at regular intervals (depending on your jurisdiction, this can be pretty specific), must deliver a specified rate of flow for a minimum period, and must deliver tepid water instead of cold. In many workplaces, these showers are there “just in case” and don’t see regular use. This makes this symbol particularly important since it will guide workers who likely have never had to use them.  Biohazard This symbol indicates the presence of biologically harmful substances, such as infection agents, live viruses, bacteria, or mold.  The biohazard symbol is probably seen on a lot more t-shirts than worksites. But in certain applications (labs, pharmaceuticals, and medical facilities in particular), it continues to be an important health and safety warning. The biohazard symbol is used in WHMIS but is not an official GHS pictogram. Still, it remains prevalent because it is instantly recognizable and unambiguous.  Electrical Safety Symbols Live Electrical Equipment This symbol is displayed where there is powered electrical equipment that could deliver a shock. A similar symbol with a “flash” to the side indicates that the equipment also poses an arc flash risk. This basic symbol is usually accompanied by text, but knowing its meaning is still important – especially since the text is typically relevant in only one language. High Voltage or Shock Hazard Sometimes considered interchangeable with the basic lighting bolt symbol, this one communicates a more specific hazard. Namely, that the equipment can electrocute you. You’re likely to see this type of sign around transformers, power plants, power panels, and other high voltage electricity-channelling equipment. No one should enter into areas with this symbol unless they have been authorized and trained to do so. Connect Earth Terminal to Ground The ground symbol is used to indicate that a piece of equipment needs to be connected to “ground” or “earth.”  This usually involves driving a ground rod to a suitable depth where the electricity can safely be discharged, rather than introducing current into the surrounding materials, equipment, or workers. Sensitive Electronic Device These signs are commonly seen around electronics manufacturing facilities. They aim to protect the integrity of materials or partially assembled components. Such signage is displayed for work on containment areas that house components like circuit boards, which can be damaged or irreparably ruined by a simple static discharge.  The basic yellow and black warning pictogram alerts a worker that there is a condition that requires their attention. In this case: don’t touch anything unless you know what you’re doing! Fire Safety Symbols No Smoking This one might seem almost too obvious to include because it is so ubiquitous. It isn’t quite as prevalent as it once was, however. That’s because it used to be posted to denote the only places where smoking wasn’t permitted. Now, it’s largely been flipped so that smoking is only permitted in specially designated areas where second-hand smoke is unlikely to reach non-smokers.  Although smoking is generally not permitted in workplaces and public areas, you might still see this sign posted where lighting a cigarette might be especially risky (near gas pumps, for example).  In workplace settings, cigarettes, lighters, and other smoking implements are generally considered ignition sources for potentially flammable atmospheres or materials, especially since cigarettes can smolder for a long time after they’ve been discarded. Fire Exit / Evacuation Route This sign points the way out of a building or facility in the event of an emergency – which is not always the same way you came in. These signs are so commonplace that we barely notice them in most places, but they become critical when the fire alarm goes off and you have to calmly make your way to the designated exit. Elevators disable when there is a fire, so these signs also discourage people from wasting time going to them instead of heading for the stairwell.  Emergency evacuation signs are often illuminated so they can be visible in the dark or when smoke is filling the room.  Hot Surface This symbol is often posted near cooktops, ovens, and other heat-generating appliances. It’s also useful on machinery casings, piping and conduits, and other surfaces that may become hot as a byproduct of their operation.  The signage warns workers to avoid getting burned by coming into contact with the surface, but also that the surface is not a place to leave a jacket, stack of boxes, or anything that could cause a fire.  Gas Safety Signs and Symbols No Ignition Sources This symbol depicting a lit match is usually posted alongside No Smoking signs (most commonly at gas stations). It indicates that any ignition source has the potential to cause a fire. It may not be the most straightforward symbol, since it doesn’t apply only to matches, but to any source of ignition. Still, it is widely used and worth knowing. Gas Cylinder Storage Area These signs don’t have a standard style or dimensions. There are numerous versions of this symbol and they don’t always mean exactly the same thing.  This symbol is generally used where compressed gas bottles (such as oxygen and acetylene) are stored, which requires several safety considerations. At the very least, you should be using a spotter when operating vehicles around an outdoor storage area where this symbol is posted.  Respirator Required This symbol indicates that no work can take place in the area without the use of a respirator. You might see it, for example, on vessels that have the potential to expose workers to gases and vapors, develop an oxygen-deficient atmosphere, or house respirable particles like silica or asbestos. This is common in confined spaces, where isolation can’t be completely assured and gases could be introduced.  Poison Safety Symbols Chemical Weapon This symbol is used where either the precursor chemical or the full product is made or stored. Chances are, you’ll never actually see this one in your workplace. Not unless you work for a weapons manufacturer or on a military installation. Even then, only in certain countries – the development, manufacture, and retention of these agents is banned in over 190 states through the Chemical Weapons Convention.  Poison This classic skull and crossbones design denotes the presence of poison or toxic materials.  It’s the progenitor of the modern GHS symbol for acute toxicity, but is still used on some consumer products that don’t fall under workplace chemical regulations. Noxious / Irritant This simple X indicates the presence of irritating materials. This symbol is more commonly used in Europe. It is particularly useful where the irritant isn’t completely contained (in a paint booth, for example) and anyone entering the area may be exposed to it. Other Safety Symbols Stop / No Admittance / Authorized Personnel Only This ISO symbol acts as a general caution not to proceed any further. This type of sign is typically posted at the entrance to restricted areas (whether for safety or security reasons), but can also be used as a reminder for those who have clearance that they are entering an area with special safety observances (such as PPE or entrance logs). Non-Ionizing Radiation Non-ionizing radiation is generally considered harmless to humans, but you might still see this warning symbol around equipment that operates over communications protocols, such as transmitters, routers, and cellular antennae. Under some circumstances, these devices can interfere with one another when using shared bands, affecting the performance of electronics.  Laser This placard is displayed wherever there are lasers that produce significant heat, could harm workers trying to peek inside the enclosures, or could cause harm when reflecting off other surfaces. Lasers are used in numerous applications, from measurement, infrared sensing, guidance, cleaning, and design, all the way to industrial metal fabrication. As they are extremely focused forms of light, they can be harmful to humans, especially to the eyes.  Which Signs and Symbols Are Appropriate for Your Workplace? To know what symbols should be in your workplace, you’ll need to perform a comprehensive risk assessment. Assessments should be conducted for each activity and at each designated workspace to make sure you identify all potential hazards. Once you have that information, you’ll know where workers will need safety reminders. Note, however, that you might want to make sure the signs can be moved. After a while, workers become so familiar with the safety signs that they start to just be part of the background. To avoid this “sign blindness,” safety experts recommend switching up the location of your signs every so often to keep the safety message top of mind. Conclusion Safety signs and symbols exist to make identifying potential hazards easier. Keep things simple by spreading signs out within an area to avoid clustering them. Too many signs crammed together overwhelms workers with information and makes it less likely that they pay careful attention. And remember that safety signs only work if everyone understands them. Conduct regular refresher training to ensure that every worker is familiar with the symbols and their meanings. Ready to learn more? Check out our free on demand webinar on Building Credibility and Buy-In Within Your Organization! And sign up for the Safeopedia Newsletter to get lots more safety info delivered straight to your inbox! Related Terms Globally Harmonized System Pictogram Safety Symbols Interactive Safety Signs First Aid Sign Sign Blindness Short-Term Exposure Limit Hazard Dust Lower Explosive Limit Share This Article

Non-ionizing radiation is generally considered harmless to humans, but you might still see this warning symbol around equipment that operates over communications protocols, such as transmitters, routers, and cellular antennae.

The image here shows a standard crossroads, if you are performing a U-Turn in a Crossroads you should do the right-hand version (follow the Red path) so long as you are not crossing a Solid White Line.

There are two different types of safety symbols: one refers to general safety protocols, while the other is used specifically for labeling chemicals that may be hazardous.

Each category has its own specific color and sign shape that remains consistent around the world as per safety regulations.

In workplace settings, cigarettes, lighters, and other smoking implements are generally considered ignition sources for potentially flammable atmospheres or materials, especially since cigarettes can smolder for a long time after they’ve been discarded.

This symbol is generally used where compressed gas bottles (such as oxygen and acetylene) are stored, which requires several safety considerations. At the very least, you should be using a spotter when operating vehicles around an outdoor storage area where this symbol is posted.

Note, however, that you might want to make sure the signs can be moved. After a while, workers become so familiar with the safety signs that they start to just be part of the background. To avoid this “sign blindness,” safety experts recommend switching up the location of your signs every so often to keep the safety message top of mind.

A D-ring is a D-shaped tie-down ring used as a device to hold workers tightly with a rope or cord to prevent them from falling. A belt with D-rings is fastened around either the middle of the back or the hip area. A full-body harness is used for personal fall arrest to distribute fall forces across… View Full Term

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This one might seem almost too obvious to include because it is so ubiquitous. It isn’t quite as prevalent as it once was, however. That’s because it used to be posted to denote the only places where smoking wasn’t permitted. Now, it’s largely been flipped so that smoking is only permitted in specially designated areas where second-hand smoke is unlikely to reach non-smokers.

And remember that safety signs only work if everyone understands them. Conduct regular refresher training to ensure that every worker is familiar with the symbols and their meanings.

U turn signhistory

Canada’s Workplace Hazardous Materials Information System (WHMIS) and OSHA’s Hazard Communication Standard (HCS) align with and draw on the Globally Harmonized System of Classification and Labeling of Chemicals (GHS). Using this international system helps ensure consistency in the classification of chemicals and the communication of hazard information on labels and safety data sheets.

Some of them will be familiar to most people. We all have a pretty good idea of the risks we’re facing when we see the Biohazard symbol, for instance.

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Safety signs can be a tricky business. Some have words and a clear message, but many rely on visual symbols to warn of potential danger. This is an effective way to communicate potential workplace hazards – as long as workers understand what the symbols mean. Advertisement There are two different types of safety symbols: one refers to general safety protocols, while the other is used specifically for labeling chemicals that may be hazardous. Since most workplaces have a combination of both, it’s important to understand each of them. Advertisement Why Use Safety Signs and Symbols? These pictures may not say a thousand words, but they are universally recognized symbols that transcend language. No matter where you’re working, you’ll be able to understand the potential hazards you face simply by looking at the posted symbols. The best occupational health and safety programs use a series of signs and symbols to convey a complete message. For example, a hazardous gas symbol may alert workers to the potential presence of a harmful gas. But an accompanying sign mandating the use of a gas mask takes it a step further by telling workers how to handle the hazard. Signs and symbols are no substitute for training, but they do serve as important reminders. They can be particularly helpful for workers who are not familiar with a specific area or process. A simple sign with a safety symbol allows workers to efficiently identify the potential hazard and make an immediate decision. Advertisement 4 Key Types of Safety Symbols Most safety signs and symbols fall into one of four categories: Prohibition Warning Mandatory Emergency Each category has its own specific color and sign shape that remains consistent around the world as per safety regulations. By getting to know the key characteristics of each type of symbol, you’ll be able to easily identify whether a sign is asking you to stop doing something, start doing something, take precautions, or advising you of emergency equipment or facilities. Category / Color Information / Instruction Features Examples Prohibition (Red) Dangerous behavior Stop Shutdown Emergency cut-out devices Evacuate Round shape Black pictogram on white background Red edging with a red diagonal line Do not touch No access for unauthorized persons Do not enter Warning (Yellow) Be careful Take precautions Hazard nearby Triangular shape Black pictogram on yellow background Black edging Electric shock Magnetic field Biological hazard General warning Mandatory (Blue) Specific behavior or action Round shape White pictogram on blue background Wear safety glasses Wash hands Use safety harness Emergency (Green) Doors Exits Escape routes Equipment and facilities Rectangular or square shape White pictogram on green background Emergency exit/escape route Eyewash station First aid kit   Want to overcome some major safety challenges? Check out our free whitepaper on What It Takes to Become an EHS Leader!   Hazardous Chemicals Communication Standards and Symbols Canada’s Workplace Hazardous Materials Information System (WHMIS) and OSHA’s Hazard Communication Standard (HCS) align with and draw on the Globally Harmonized System of Classification and Labeling of Chemicals (GHS). Using this international system helps ensure consistency in the classification of chemicals and the communication of hazard information on labels and safety data sheets. The system uses pictograms on labels to alert users of the chemical hazards they may be exposed to and helps contribute to chemical safety. Every symbol consists of a black pictogram on a white background, framed by a red border. There are nine different pictograms, each representing a different chemical hazard classification. Health Hazard Carcinogen Mutagenicity Reproductive toxicity Respiratory sensitizer Target organ toxicity Aspiration toxicity Flame Flammables Pyrophorics Self-heating Emits flammable gas Self-reactives Organic peroxides Exclamation Mark Irritant (skin and eye) Skin sensitizer Acute toxicity (harmful) Narcotic effects Respiratory tract irritant Hazardous to ozone layer Gas Cylinder Gases under pressure Corrosion Skin corrosion/burns Eye damage Corrosive to metals   Exploding Bomb Explosives Self-reactives Organic peroxides Flame Over Circle Oxidizers   Environment Aquatic toxicity   Skull and Crossbones Acute toxicity (fatal or toxic) Common Types of Safety Signs and Symbols of Note There are numerous safety pictograms that aren’t derived from the GHS but are still highly important.  Some of them will be familiar to most people. We all have a pretty good idea of the risks we’re facing when we see the Biohazard symbol, for instance.  Others aren’t so obvious. The symbols provide vital information about the hazards in your work environment, but unless you know what they mean, they won’t do much to keep you safe. So, let’s look at a selection of the signs, symbols, and pictograms you might encounter on the job and what they mean. Be aware, however, that this is by no means a comprehensive list. This is a selection of the safety symbols for some of the major workplace hazard categories, but they might not be the only ones.  Chemical Safety Signs and Symbols Ionizing Radiation This symbol signals the presence of ionizing radiation. This type of radiation is a significant hazard that has the potential to change the structure of molecules (including DNA) in such a way that it could disrupt normal cell functioning. In the right doses, ionizing radiation can cause germ cell damage, fetal damage, radiation sickness, or cancer.  You’re already familiar with this radiation symbol – if only because you’ve seen it so often in movies. But it’s not common in most worksites. It’s not even present everywhere there’s a radiation hazard. In some cases, like on some detectors using americium-241, you might find the generic GHS “health hazard” pictogram instead. Why? Because we tend to associate the symbol with major devastating catastrophes, which doesn’t always reflect the actual level of risk. That being said, it still appears in some contexts, such as nondestructive testing (NDT), ammonia plants, nuclear power plants, and radiology. Emergency Shower This sign marks the location of the emergency shower, something workers should be aware of when handling certain hazardous materials. These emergency showers aren’t just any spot where hazardous materials can be washed off. They are purpose-built showers that must be tested at regular intervals (depending on your jurisdiction, this can be pretty specific), must deliver a specified rate of flow for a minimum period, and must deliver tepid water instead of cold. In many workplaces, these showers are there “just in case” and don’t see regular use. This makes this symbol particularly important since it will guide workers who likely have never had to use them.  Biohazard This symbol indicates the presence of biologically harmful substances, such as infection agents, live viruses, bacteria, or mold.  The biohazard symbol is probably seen on a lot more t-shirts than worksites. But in certain applications (labs, pharmaceuticals, and medical facilities in particular), it continues to be an important health and safety warning. The biohazard symbol is used in WHMIS but is not an official GHS pictogram. Still, it remains prevalent because it is instantly recognizable and unambiguous.  Electrical Safety Symbols Live Electrical Equipment This symbol is displayed where there is powered electrical equipment that could deliver a shock. A similar symbol with a “flash” to the side indicates that the equipment also poses an arc flash risk. This basic symbol is usually accompanied by text, but knowing its meaning is still important – especially since the text is typically relevant in only one language. High Voltage or Shock Hazard Sometimes considered interchangeable with the basic lighting bolt symbol, this one communicates a more specific hazard. Namely, that the equipment can electrocute you. You’re likely to see this type of sign around transformers, power plants, power panels, and other high voltage electricity-channelling equipment. No one should enter into areas with this symbol unless they have been authorized and trained to do so. Connect Earth Terminal to Ground The ground symbol is used to indicate that a piece of equipment needs to be connected to “ground” or “earth.”  This usually involves driving a ground rod to a suitable depth where the electricity can safely be discharged, rather than introducing current into the surrounding materials, equipment, or workers. Sensitive Electronic Device These signs are commonly seen around electronics manufacturing facilities. They aim to protect the integrity of materials or partially assembled components. Such signage is displayed for work on containment areas that house components like circuit boards, which can be damaged or irreparably ruined by a simple static discharge.  The basic yellow and black warning pictogram alerts a worker that there is a condition that requires their attention. In this case: don’t touch anything unless you know what you’re doing! Fire Safety Symbols No Smoking This one might seem almost too obvious to include because it is so ubiquitous. It isn’t quite as prevalent as it once was, however. That’s because it used to be posted to denote the only places where smoking wasn’t permitted. Now, it’s largely been flipped so that smoking is only permitted in specially designated areas where second-hand smoke is unlikely to reach non-smokers.  Although smoking is generally not permitted in workplaces and public areas, you might still see this sign posted where lighting a cigarette might be especially risky (near gas pumps, for example).  In workplace settings, cigarettes, lighters, and other smoking implements are generally considered ignition sources for potentially flammable atmospheres or materials, especially since cigarettes can smolder for a long time after they’ve been discarded. Fire Exit / Evacuation Route This sign points the way out of a building or facility in the event of an emergency – which is not always the same way you came in. These signs are so commonplace that we barely notice them in most places, but they become critical when the fire alarm goes off and you have to calmly make your way to the designated exit. Elevators disable when there is a fire, so these signs also discourage people from wasting time going to them instead of heading for the stairwell.  Emergency evacuation signs are often illuminated so they can be visible in the dark or when smoke is filling the room.  Hot Surface This symbol is often posted near cooktops, ovens, and other heat-generating appliances. It’s also useful on machinery casings, piping and conduits, and other surfaces that may become hot as a byproduct of their operation.  The signage warns workers to avoid getting burned by coming into contact with the surface, but also that the surface is not a place to leave a jacket, stack of boxes, or anything that could cause a fire.  Gas Safety Signs and Symbols No Ignition Sources This symbol depicting a lit match is usually posted alongside No Smoking signs (most commonly at gas stations). It indicates that any ignition source has the potential to cause a fire. It may not be the most straightforward symbol, since it doesn’t apply only to matches, but to any source of ignition. Still, it is widely used and worth knowing. Gas Cylinder Storage Area These signs don’t have a standard style or dimensions. There are numerous versions of this symbol and they don’t always mean exactly the same thing.  This symbol is generally used where compressed gas bottles (such as oxygen and acetylene) are stored, which requires several safety considerations. At the very least, you should be using a spotter when operating vehicles around an outdoor storage area where this symbol is posted.  Respirator Required This symbol indicates that no work can take place in the area without the use of a respirator. You might see it, for example, on vessels that have the potential to expose workers to gases and vapors, develop an oxygen-deficient atmosphere, or house respirable particles like silica or asbestos. This is common in confined spaces, where isolation can’t be completely assured and gases could be introduced.  Poison Safety Symbols Chemical Weapon This symbol is used where either the precursor chemical or the full product is made or stored. Chances are, you’ll never actually see this one in your workplace. Not unless you work for a weapons manufacturer or on a military installation. Even then, only in certain countries – the development, manufacture, and retention of these agents is banned in over 190 states through the Chemical Weapons Convention.  Poison This classic skull and crossbones design denotes the presence of poison or toxic materials.  It’s the progenitor of the modern GHS symbol for acute toxicity, but is still used on some consumer products that don’t fall under workplace chemical regulations. Noxious / Irritant This simple X indicates the presence of irritating materials. This symbol is more commonly used in Europe. It is particularly useful where the irritant isn’t completely contained (in a paint booth, for example) and anyone entering the area may be exposed to it. Other Safety Symbols Stop / No Admittance / Authorized Personnel Only This ISO symbol acts as a general caution not to proceed any further. This type of sign is typically posted at the entrance to restricted areas (whether for safety or security reasons), but can also be used as a reminder for those who have clearance that they are entering an area with special safety observances (such as PPE or entrance logs). Non-Ionizing Radiation Non-ionizing radiation is generally considered harmless to humans, but you might still see this warning symbol around equipment that operates over communications protocols, such as transmitters, routers, and cellular antennae. Under some circumstances, these devices can interfere with one another when using shared bands, affecting the performance of electronics.  Laser This placard is displayed wherever there are lasers that produce significant heat, could harm workers trying to peek inside the enclosures, or could cause harm when reflecting off other surfaces. Lasers are used in numerous applications, from measurement, infrared sensing, guidance, cleaning, and design, all the way to industrial metal fabrication. As they are extremely focused forms of light, they can be harmful to humans, especially to the eyes.  Which Signs and Symbols Are Appropriate for Your Workplace? To know what symbols should be in your workplace, you’ll need to perform a comprehensive risk assessment. Assessments should be conducted for each activity and at each designated workspace to make sure you identify all potential hazards. Once you have that information, you’ll know where workers will need safety reminders. Note, however, that you might want to make sure the signs can be moved. After a while, workers become so familiar with the safety signs that they start to just be part of the background. To avoid this “sign blindness,” safety experts recommend switching up the location of your signs every so often to keep the safety message top of mind. Conclusion Safety signs and symbols exist to make identifying potential hazards easier. Keep things simple by spreading signs out within an area to avoid clustering them. Too many signs crammed together overwhelms workers with information and makes it less likely that they pay careful attention. And remember that safety signs only work if everyone understands them. Conduct regular refresher training to ensure that every worker is familiar with the symbols and their meanings. Ready to learn more? Check out our free on demand webinar on Building Credibility and Buy-In Within Your Organization! And sign up for the Safeopedia Newsletter to get lots more safety info delivered straight to your inbox! Related Terms Globally Harmonized System Pictogram Safety Symbols Interactive Safety Signs First Aid Sign Sign Blindness Short-Term Exposure Limit Hazard Dust Lower Explosive Limit Share This Article

To know what symbols should be in your workplace, you’ll need to perform a comprehensive risk assessment. Assessments should be conducted for each activity and at each designated workspace to make sure you identify all potential hazards. Once you have that information, you’ll know where workers will need safety reminders.

This sign points the way out of a building or facility in the event of an emergency – which is not always the same way you came in.

It may not be the most straightforward symbol, since it doesn’t apply only to matches, but to any source of ignition. Still, it is widely used and worth knowing.

These pictures may not say a thousand words, but they are universally recognized symbols that transcend language. No matter where you’re working, you’ll be able to understand the potential hazards you face simply by looking at the posted symbols.

The biohazard symbol is probably seen on a lot more t-shirts than worksites. But in certain applications (labs, pharmaceuticals, and medical facilities in particular), it continues to be an important health and safety warning.

Such signage is displayed for work on containment areas that house components like circuit boards, which can be damaged or irreparably ruined by a simple static discharge.

This symbol depicting a lit match is usually posted alongside No Smoking signs (most commonly at gas stations). It indicates that any ignition source has the potential to cause a fire.

Sometimes considered interchangeable with the basic lighting bolt symbol, this one communicates a more specific hazard. Namely, that the equipment can electrocute you.

These signs are commonly seen around electronics manufacturing facilities. They aim to protect the integrity of materials or partially assembled components.

You might see it, for example, on vessels that have the potential to expose workers to gases and vapors, develop an oxygen-deficient atmosphere, or house respirable particles like silica or asbestos. This is common in confined spaces, where isolation can’t be completely assured and gases could be introduced.

UNLESS: Except when there is a sign saying that you can't. Obviously such an intersection with a sign stating "No U-Turn Permitted", or similar, you would not be allowed to perform a U-Turn.So the standard rule is: You can perform a U-Turn, unless there is a sign saying otherwise.

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It’s the progenitor of the modern GHS symbol for acute toxicity, but is still used on some consumer products that don’t fall under workplace chemical regulations.

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In many workplaces, these showers are there “just in case” and don’t see regular use. This makes this symbol particularly important since it will guide workers who likely have never had to use them.

Shop GIVE WAY road signs available to buy online at hirstsigns.co.uk! All of your road signage needs, all in one place. Order online.

This basic symbol is usually accompanied by text, but knowing its meaning is still important – especially since the text is typically relevant in only one language.

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This symbol signals the presence of ionizing radiation. This type of radiation is a significant hazard that has the potential to change the structure of molecules (including DNA) in such a way that it could disrupt normal cell functioning.

This sign marks the location of the emergency shower, something workers should be aware of when handling certain hazardous materials.

Lasers are used in numerous applications, from measurement, infrared sensing, guidance, cleaning, and design, all the way to industrial metal fabrication. As they are extremely focused forms of light, they can be harmful to humans, especially to the eyes.

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This page has been put together using Qld road rules legislation as of 2009. It is in no way purposed or designed to be used for legal defence or legal advice! It is designed to help you know and obey the road rules. Not to justify bad driving behaviours.

Our American Lighting LED string lights are constructed with heavy duty weatherproof material — making them durable enough to last for ...

Signs and symbols are no substitute for training, but they do serve as important reminders. They can be particularly helpful for workers who are not familiar with a specific area or process. A simple sign with a safety symbol allows workers to efficiently identify the potential hazard and make an immediate decision. Advertisement 4 Key Types of Safety Symbols Most safety signs and symbols fall into one of four categories: Prohibition Warning Mandatory Emergency Each category has its own specific color and sign shape that remains consistent around the world as per safety regulations. By getting to know the key characteristics of each type of symbol, you’ll be able to easily identify whether a sign is asking you to stop doing something, start doing something, take precautions, or advising you of emergency equipment or facilities. Category / Color Information / Instruction Features Examples Prohibition (Red) Dangerous behavior Stop Shutdown Emergency cut-out devices Evacuate Round shape Black pictogram on white background Red edging with a red diagonal line Do not touch No access for unauthorized persons Do not enter Warning (Yellow) Be careful Take precautions Hazard nearby Triangular shape Black pictogram on yellow background Black edging Electric shock Magnetic field Biological hazard General warning Mandatory (Blue) Specific behavior or action Round shape White pictogram on blue background Wear safety glasses Wash hands Use safety harness Emergency (Green) Doors Exits Escape routes Equipment and facilities Rectangular or square shape White pictogram on green background Emergency exit/escape route Eyewash station First aid kit   Want to overcome some major safety challenges? Check out our free whitepaper on What It Takes to Become an EHS Leader!   Hazardous Chemicals Communication Standards and Symbols Canada’s Workplace Hazardous Materials Information System (WHMIS) and OSHA’s Hazard Communication Standard (HCS) align with and draw on the Globally Harmonized System of Classification and Labeling of Chemicals (GHS). Using this international system helps ensure consistency in the classification of chemicals and the communication of hazard information on labels and safety data sheets. The system uses pictograms on labels to alert users of the chemical hazards they may be exposed to and helps contribute to chemical safety. Every symbol consists of a black pictogram on a white background, framed by a red border. There are nine different pictograms, each representing a different chemical hazard classification. Health Hazard Carcinogen Mutagenicity Reproductive toxicity Respiratory sensitizer Target organ toxicity Aspiration toxicity Flame Flammables Pyrophorics Self-heating Emits flammable gas Self-reactives Organic peroxides Exclamation Mark Irritant (skin and eye) Skin sensitizer Acute toxicity (harmful) Narcotic effects Respiratory tract irritant Hazardous to ozone layer Gas Cylinder Gases under pressure Corrosion Skin corrosion/burns Eye damage Corrosive to metals   Exploding Bomb Explosives Self-reactives Organic peroxides Flame Over Circle Oxidizers   Environment Aquatic toxicity   Skull and Crossbones Acute toxicity (fatal or toxic) Common Types of Safety Signs and Symbols of Note There are numerous safety pictograms that aren’t derived from the GHS but are still highly important.  Some of them will be familiar to most people. We all have a pretty good idea of the risks we’re facing when we see the Biohazard symbol, for instance.  Others aren’t so obvious. The symbols provide vital information about the hazards in your work environment, but unless you know what they mean, they won’t do much to keep you safe. So, let’s look at a selection of the signs, symbols, and pictograms you might encounter on the job and what they mean. Be aware, however, that this is by no means a comprehensive list. This is a selection of the safety symbols for some of the major workplace hazard categories, but they might not be the only ones.  Chemical Safety Signs and Symbols Ionizing Radiation This symbol signals the presence of ionizing radiation. This type of radiation is a significant hazard that has the potential to change the structure of molecules (including DNA) in such a way that it could disrupt normal cell functioning. In the right doses, ionizing radiation can cause germ cell damage, fetal damage, radiation sickness, or cancer.  You’re already familiar with this radiation symbol – if only because you’ve seen it so often in movies. But it’s not common in most worksites. It’s not even present everywhere there’s a radiation hazard. In some cases, like on some detectors using americium-241, you might find the generic GHS “health hazard” pictogram instead. Why? Because we tend to associate the symbol with major devastating catastrophes, which doesn’t always reflect the actual level of risk. That being said, it still appears in some contexts, such as nondestructive testing (NDT), ammonia plants, nuclear power plants, and radiology. Emergency Shower This sign marks the location of the emergency shower, something workers should be aware of when handling certain hazardous materials. These emergency showers aren’t just any spot where hazardous materials can be washed off. They are purpose-built showers that must be tested at regular intervals (depending on your jurisdiction, this can be pretty specific), must deliver a specified rate of flow for a minimum period, and must deliver tepid water instead of cold. In many workplaces, these showers are there “just in case” and don’t see regular use. This makes this symbol particularly important since it will guide workers who likely have never had to use them.  Biohazard This symbol indicates the presence of biologically harmful substances, such as infection agents, live viruses, bacteria, or mold.  The biohazard symbol is probably seen on a lot more t-shirts than worksites. But in certain applications (labs, pharmaceuticals, and medical facilities in particular), it continues to be an important health and safety warning. The biohazard symbol is used in WHMIS but is not an official GHS pictogram. Still, it remains prevalent because it is instantly recognizable and unambiguous.  Electrical Safety Symbols Live Electrical Equipment This symbol is displayed where there is powered electrical equipment that could deliver a shock. A similar symbol with a “flash” to the side indicates that the equipment also poses an arc flash risk. This basic symbol is usually accompanied by text, but knowing its meaning is still important – especially since the text is typically relevant in only one language. High Voltage or Shock Hazard Sometimes considered interchangeable with the basic lighting bolt symbol, this one communicates a more specific hazard. Namely, that the equipment can electrocute you. You’re likely to see this type of sign around transformers, power plants, power panels, and other high voltage electricity-channelling equipment. No one should enter into areas with this symbol unless they have been authorized and trained to do so. Connect Earth Terminal to Ground The ground symbol is used to indicate that a piece of equipment needs to be connected to “ground” or “earth.”  This usually involves driving a ground rod to a suitable depth where the electricity can safely be discharged, rather than introducing current into the surrounding materials, equipment, or workers. Sensitive Electronic Device These signs are commonly seen around electronics manufacturing facilities. They aim to protect the integrity of materials or partially assembled components. Such signage is displayed for work on containment areas that house components like circuit boards, which can be damaged or irreparably ruined by a simple static discharge.  The basic yellow and black warning pictogram alerts a worker that there is a condition that requires their attention. In this case: don’t touch anything unless you know what you’re doing! Fire Safety Symbols No Smoking This one might seem almost too obvious to include because it is so ubiquitous. It isn’t quite as prevalent as it once was, however. That’s because it used to be posted to denote the only places where smoking wasn’t permitted. Now, it’s largely been flipped so that smoking is only permitted in specially designated areas where second-hand smoke is unlikely to reach non-smokers.  Although smoking is generally not permitted in workplaces and public areas, you might still see this sign posted where lighting a cigarette might be especially risky (near gas pumps, for example).  In workplace settings, cigarettes, lighters, and other smoking implements are generally considered ignition sources for potentially flammable atmospheres or materials, especially since cigarettes can smolder for a long time after they’ve been discarded. Fire Exit / Evacuation Route This sign points the way out of a building or facility in the event of an emergency – which is not always the same way you came in. These signs are so commonplace that we barely notice them in most places, but they become critical when the fire alarm goes off and you have to calmly make your way to the designated exit. Elevators disable when there is a fire, so these signs also discourage people from wasting time going to them instead of heading for the stairwell.  Emergency evacuation signs are often illuminated so they can be visible in the dark or when smoke is filling the room.  Hot Surface This symbol is often posted near cooktops, ovens, and other heat-generating appliances. It’s also useful on machinery casings, piping and conduits, and other surfaces that may become hot as a byproduct of their operation.  The signage warns workers to avoid getting burned by coming into contact with the surface, but also that the surface is not a place to leave a jacket, stack of boxes, or anything that could cause a fire.  Gas Safety Signs and Symbols No Ignition Sources This symbol depicting a lit match is usually posted alongside No Smoking signs (most commonly at gas stations). It indicates that any ignition source has the potential to cause a fire. It may not be the most straightforward symbol, since it doesn’t apply only to matches, but to any source of ignition. Still, it is widely used and worth knowing. Gas Cylinder Storage Area These signs don’t have a standard style or dimensions. There are numerous versions of this symbol and they don’t always mean exactly the same thing.  This symbol is generally used where compressed gas bottles (such as oxygen and acetylene) are stored, which requires several safety considerations. At the very least, you should be using a spotter when operating vehicles around an outdoor storage area where this symbol is posted.  Respirator Required This symbol indicates that no work can take place in the area without the use of a respirator. You might see it, for example, on vessels that have the potential to expose workers to gases and vapors, develop an oxygen-deficient atmosphere, or house respirable particles like silica or asbestos. This is common in confined spaces, where isolation can’t be completely assured and gases could be introduced.  Poison Safety Symbols Chemical Weapon This symbol is used where either the precursor chemical or the full product is made or stored. Chances are, you’ll never actually see this one in your workplace. Not unless you work for a weapons manufacturer or on a military installation. Even then, only in certain countries – the development, manufacture, and retention of these agents is banned in over 190 states through the Chemical Weapons Convention.  Poison This classic skull and crossbones design denotes the presence of poison or toxic materials.  It’s the progenitor of the modern GHS symbol for acute toxicity, but is still used on some consumer products that don’t fall under workplace chemical regulations. Noxious / Irritant This simple X indicates the presence of irritating materials. This symbol is more commonly used in Europe. It is particularly useful where the irritant isn’t completely contained (in a paint booth, for example) and anyone entering the area may be exposed to it. Other Safety Symbols Stop / No Admittance / Authorized Personnel Only This ISO symbol acts as a general caution not to proceed any further. This type of sign is typically posted at the entrance to restricted areas (whether for safety or security reasons), but can also be used as a reminder for those who have clearance that they are entering an area with special safety observances (such as PPE or entrance logs). Non-Ionizing Radiation Non-ionizing radiation is generally considered harmless to humans, but you might still see this warning symbol around equipment that operates over communications protocols, such as transmitters, routers, and cellular antennae. Under some circumstances, these devices can interfere with one another when using shared bands, affecting the performance of electronics.  Laser This placard is displayed wherever there are lasers that produce significant heat, could harm workers trying to peek inside the enclosures, or could cause harm when reflecting off other surfaces. Lasers are used in numerous applications, from measurement, infrared sensing, guidance, cleaning, and design, all the way to industrial metal fabrication. As they are extremely focused forms of light, they can be harmful to humans, especially to the eyes.  Which Signs and Symbols Are Appropriate for Your Workplace? To know what symbols should be in your workplace, you’ll need to perform a comprehensive risk assessment. Assessments should be conducted for each activity and at each designated workspace to make sure you identify all potential hazards. Once you have that information, you’ll know where workers will need safety reminders. Note, however, that you might want to make sure the signs can be moved. After a while, workers become so familiar with the safety signs that they start to just be part of the background. To avoid this “sign blindness,” safety experts recommend switching up the location of your signs every so often to keep the safety message top of mind. Conclusion Safety signs and symbols exist to make identifying potential hazards easier. Keep things simple by spreading signs out within an area to avoid clustering them. Too many signs crammed together overwhelms workers with information and makes it less likely that they pay careful attention. And remember that safety signs only work if everyone understands them. Conduct regular refresher training to ensure that every worker is familiar with the symbols and their meanings. Ready to learn more? Check out our free on demand webinar on Building Credibility and Buy-In Within Your Organization! And sign up for the Safeopedia Newsletter to get lots more safety info delivered straight to your inbox! Related Terms Globally Harmonized System Pictogram Safety Symbols Interactive Safety Signs First Aid Sign Sign Blindness Short-Term Exposure Limit Hazard Dust Lower Explosive Limit Share This Article

These symbols provide essential safety information that could prevent injury – or save a life. Every worker should know them and what they mean.

Keep Left Single Disk sign must be erected at or near the face of a physical traffic island to face approaching traffic where it is intended that traffic ...

These emergency showers aren’t just any spot where hazardous materials can be washed off. They are purpose-built showers that must be tested at regular intervals (depending on your jurisdiction, this can be pretty specific), must deliver a specified rate of flow for a minimum period, and must deliver tepid water instead of cold.

These symbols provide essential safety information that could prevent injury – or save a life. Every worker should know them and what they mean.

Our wholesale personalized rubber bar spill mat will be a good addition to barware. In the bar accessories segment, you can find a wide assortment of ...

U turn permitted signmeaning

This material is protected by: Inform road-users of the potential of the roadway becoming slippery when it is wet.

The basic yellow and black warning pictogram alerts a worker that there is a condition that requires their attention. In this case: don’t touch anything unless you know what you’re doing!

You’re likely to see this type of sign around transformers, power plants, power panels, and other high voltage electricity-channelling equipment.

This type of sign is typically posted at the entrance to restricted areas (whether for safety or security reasons), but can also be used as a reminder for those who have clearance that they are entering an area with special safety observances (such as PPE or entrance logs).

By getting to know the key characteristics of each type of symbol, you’ll be able to easily identify whether a sign is asking you to stop doing something, start doing something, take precautions, or advising you of emergency equipment or facilities.

Put in some traffic lights and you switch the whole ruling around. You are NOT permitted to perform a U-Turn at traffic lights!UNLESS: Except when there is a sign saying that you CAN. Again if such a sign is here you can do a U-Turn once you have given way to all other traffic that has a Green light. If you have a Green Right Turn Arrow BEWARE of traffic to your Right that may have a Green Left Turn Arrow, you are expected to give way to them as well.

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These signs don’t have a standard style or dimensions. There are numerous versions of this symbol and they don’t always mean exactly the same thing.

Although smoking is generally not permitted in workplaces and public areas, you might still see this sign posted where lighting a cigarette might be especially risky (near gas pumps, for example).

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This symbol is displayed where there is powered electrical equipment that could deliver a shock. A similar symbol with a “flash” to the side indicates that the equipment also poses an arc flash risk.

This symbol is more commonly used in Europe. It is particularly useful where the irritant isn’t completely contained (in a paint booth, for example) and anyone entering the area may be exposed to it.