Hello there, this is Goke Akingbade( your safety guide) here again to update you on health and safety issues. Today we will be discussing about safety signs.In the Health and Safety profession, we deal with the use of a lot of signs.A safety sign is defined as a sign providing information or instruction by means of a notice, sign board or colour used to create awareness about safety. Safety signs fall into four groups, namely: (1) Mandatory signs. (2) Prohibitory signs. (3) Hazard or Warning sign. (4) Safety information sign(Emergency Exit and First Aid). So let’s go through them one by one.

(1) MANDATORY SIGN: This is a sign providing information about specific behaviour or action which must be complied with (‘e.g hard hat must be worn or safety boots must be worn’).

FEATURES OF MANDATORY SIGNS (a) Round shape. (b) A white pictogram on a blue background(with the blue part taking up atleast 50% of the area of the sign).

(2) PROHIBITORY SIGN: This is a sign prohibiting behaviour that is likely to cause or increase danger(‘ e.g no smoking sign, No access to unauthorized persons’)                                             FEATURES OF PROHIBITORY SIGNS (a) Round shape. (b) Black pictogram on a white background. (c) Diagonal line. (d) Red edging (with the red part taking up atleast 35 % of the area of the sign).

(3) HAZARD OR WARNING SIGN: This is a sign providing warning of a hazard or danger. (e.g Danger, Beware of Electricity, Highly flammable signage at the back of a petrol tanker truck).                                                                                                                                                   FEATURES OF A WARNING SIGN (a) Triangular shape. (b) Black pictogram on yellow background with black edging (e.g with the yellow part taking up atleast 50 % of the area of the sign).

(4) EMERGENCY ESCAPE OR FIRST AID SIGN: This is a sign providing information on emergency exits, first aid or rescue facilities( ‘e.g emergency exit’).

FEATURES OF SAFETY INFORMATION SIGNS (a) Square or rectangular shape. (b) White pictogram on a green background( with the green part taking up atleast 50% of the area of the sign). Pictoral samples of the different classes of safety signs can be seen online on the internet. So until I come your way again, it is Goke Akingbade wishing you a great weekend ahead.

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Hello there, this is Goke Akingbade (your Safety guide) here with another interesting topic on health and safety to dwell on. We will be discussing ergonomics and its application to your work area.


This is the art or science of fitting the individual worker to his work environment and in connection with his work tools so as to ensure they are suitable to enable him work safely and effectively. It is the solution to Musculoskeletal disorders(MSD).


Musculoskeletal disorders are conditions that negatively affect the muscles, joints, ligaments, tendons and nerves. These injuries can develop due to overload on these parts of the human body either immediately or with time.

The following are factors that can result in a worker developing MSDs.                                       Any work or job task that involves:

  • Heavy Lifting
  • Pushing or pulling
  • Force
  • Working in awkward postures
  • Repetitive activities
  • Contact stress
  • Overhead work
  • Vibration
  • Extreme temperatures
  • Carrying

Work is likely to lead to an injury based on the following criteria:

  1. When the task is done for a long period of time.
  2. When it is performed frequently.
  3. When the work is intense.
  4. When the worker is exposed to several risk factors.


  • FEWER WORKERS EXPERIENCING PAIN: When ergonomics is applied to the job task, it will reduce the risk factors that lead to discomfort.
  • INCREASE IN PRODUCTIVITY: When ergonomic improvements is implemented, it tends to minimize the primary risk factors for MSDs, which in turn make workers more productive and have greater job satisfaction.
  • INCREASED SAVINGS FOR YOUR ORGANIZATION: More funds would be saved due to fewer worker injuries, more sustainable employees, fewer workers compensation claims.
  • INCREASED WORKER MORALE: The implementation of ergonomics to the work will tend to make the workers feel more valued because they believe that their employer is making the workplace safer for them.
  • REDUCTION IN ABSENTEEISM: When ergonomics is applied to the work, it will lead to a healthy and pain-free workforce who are more likely to be engaged and productive.

This is where we will be stopping for today,next time we will be considering the various pragmatic solutions that ergonomics provide to MSDs, so till I come your way again, this is Goke Akingbade (your Safety guide) wishing you a safe day

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