Construction site deaths - scaffold collapse, fall from height, electric shock

Avoidable accidents at different construction sites led to death of 3 persons in construction sites.
The primary reasons are collapse of scaffold on which persons were working, fall of person from height and burns due to electric shock respectively.
The news item may be read in the link below.

http://www.timesofisrael.com/three-construction-workers-killed-within-5-hours/