Fall of woman from balcony

A news item mentions about fall of woman from balcony and succumbing to injuries. Most of the builders construct balconies of height about (3 1/2 ft) which appear to be dangerous for tall persons. Though children and medium height persons (about 5 ft) may not be in danger, but taller persons when they lean on to the balcony of this height are likely to loose balance and fall.

Fall of persons and objects

A news item  mentions about suicidal death of a young lady software engineer by jumping from the 4th floor of a multilevel car parking building. What is stunning is the injury to a contract labourer as the lady fell on him during the jump.
This reminds me of an incident heard from my colleague in which a snake held by a bird flying in the sky slipped and fell on a person on the road and the person died due to snake bite.
The reasons for accidents are generally attributed to as 88% from unsafe acts, 10% from unsafe conditions and 2% from others. This type of accidents i.e injury to contractor worker or death of person on the road due to snake bite come under this 2% category.
Though we say all accidents can be prevented, it is difficult to imagine what can be done in these situations to avoid accidents. In the first case, may be, if the sidewalls of the terrace or road inside the parking building are raised to a height of - say 5 ft or more, could have prevented the person from scaling the height and protected the persons down below. But, in the second case, I do not know what can be done.
Such situations, even if brought out by any safety person, would have been laughed off as 'nonsense' and the person will be snubbed for thinking too wild. May be the risk level is very low, but not ZERO. As long as any opportunity is available to save the persons, the investment is worth as nobody can get back the life. The person's life may be valued at some amount and is compensated but he is more valuable to his family members than the compensation and this should be kept in mind. Else, surely there can be chaos and society has to bear it.

Safety nets - test before use!!!

It is a good practice to have safety nets for works at height to prevent injuries during fall of persons. Small time contractors usually avoid provision of safety nets and even if they were forced, they will provide nets only below the place of work and shift the net as the work proceeds. Because of the cost, the quality of these safety nets also is questionable. In case of doubt, it is better to test the capacity of the nets by dropping sand bags of sufficient weight from height and see whether the net is intact or strands are broken or the net sags. This will also give confidence to the workers and will be an eye opener for the contractor if the net fails. Normally, safety nets should withstand 2200 kgf. They should be provided such that the fall of person is restricted to 2 m and the width of the nets is atleast 6 m from the place of work. There should not be any gap between the wall and the net. Any construction material / debris that falls should be removed immediately to avoid injuries to persons falling on to the net. At many construction sites, I saw construction debris accumulated on the nets with nobody to remove them.

If the floor is good, then one can provide mobile nets which I saw at a construction site. A scaffold structure is made with the net tied all around. This will be located below the place of work at height and is moved as per requirement.

A few construction engineers question about the need for providing the safety net or its practicality to provide. At many places, I saw even for a small work, scaffold is erected (11 storyes height at one software company building, 5 storey height at one super speciality hospital). Therefore, what is required is commitment to ensure safety. Else, we get 1000s of excuses for not providing the scaffold / safety net.