Scaffolding. 5.1. Hazards. Falls of persons from a height, and similarly of materials and objects, represent the most serious ... by competent persons under supervision, and this training manual sets out general principles for the various commonanbsp;...
|Title||:||Safety, Health and Welfare on Construction Sites|
|Author||:||International Labour Office|
|Publisher||:||International Labour Organization - 1995-01-01|