The top of the wet sludge cake silos is partially unprotected by handrails as the design doesn't require it. The open platform is at height and workers are there which may lead to a fall from height and injury. Tools falling from the top side can also cause injury to the workers on the ground level. This area should be immediately barricaded before proceeding with the work activities. The observation is in building 19C
Hazard category: Unsafe working platforms / scaffolds