1. Prohibition signs are signs that prohibit actions that, directly or indirectly, can cause danger. Prohibition signs must have: - a round shape; - a black pictogram on a white background, with red edging and diagonal line (slanting downwards from left to right across the pictogram at a 45-degree angle to the horizontal); the red part must take up at least 35% of the area of the sign.
Prohibition signs to be used: 
No smoking 
Smoking and naked flames prohibited 
No access for pedestrians 
Do not extinguish with water 
Not drinking water 
No access for unauthorised persons 
No access for industrial vehicles 
Do not touch 2. Warning signs are signs that warn of risk and danger. Warning signs must have: - a triangular shape; - a black pictogram on a yellow background with black edging, with the yellow part taking up at least 50% of the area of the sign.
Warning signs to be used: 
Flammable material or high temperature (1) 
Ionising radiation 
General danger 
Powerful magnetic field 
Low temperature 
Explosive material 
Overhead load 
Laser beam 
Obstacle 
Toxic material 
Industrial vehicle 
Oxidant material (2) 
Drop 
Gas under pressure 
Corrosive material 
Danger: electricity 
Non-ionising radiation 
Biological hazard (3) 
Area where an explosive atmosphere may form The warning sign «General danger» must not be used to warn about dangerous chemical substances or mixtures, except in those cases where the warning sign is used in accordance with Section 5-14 to indicate storage sites for hazardous substances or mixtures. 3. Mandatory signs are signs that impose a specific action. Mandatory signs must have: - a round shape; - a white pictogram on a blue background, where the blue takes up at least 50% of the area of the sign.
Mandatory signs to be used: 
Eye protection must be worn 
Head protection must be worn 
Hearing protection must be worn 
Respiratory equipment must be worn 
Protective footwear must be worn 
Hand protection must be worn 
Protective overalls must be worn 
Face protection must be worn 
Safety harness must be worn 
Pedestrians must use this route 
General mandatory sign (to be accompanied by another sign where necessary) 4. Emergency signs are signs that provide information about emergency exits or first aid equipment. Emergency signs must have: - a rectangular or square shape; - a white pictogram on a green background, where the green part takes up at least 50% of the area of the sign.
Emergency signs to be used: 
Emergency exit/escape route 
This way 
First aid 
Stretcher 
Safety shower 
Eyewash 
Emergency telephone for calling first aid service, ambulance, police, poison control centre and rescue coordination centre 
Defibrillator/AED 5. Alarm signs are signs that indicate the location of emergency stop devices, manual call points, evacuation signals and seals. Alarm signs must have: - a square shape - a white pictogram on a red background, where the red part takes up at least 50% of the area of the sign.
Alarm signs to be used: 
Emergency stop Manual call point Evacuate Seal 6. Fire protection signs are signs that indicate the location of equipment to be used in case of fire. Fire protection signs must have: - a rectangular or square shape; - a white pictogram on a red background, where the red part takes up at least 50% of the area of the sign.
Fire protection signs to be used: 
Fire hose 
Ladder 
Fire extinguisher 
Emergency telephone for calling the fire service 
Fire extinguishing equipment 
This way
