Rota Block Large Water Filled Fence SupportThe Rota Block Large fence support ballast is a heavy duty hoarding support system that will ensure hoarding and mesh fence panels stay even in high winds. Each block weighs in at a hefty 333kg when filled with water, yet a single worker can easily position it without lifting equipment when empty. These ballast units have been wind tested, with two ballast units and one hoarding panel able to withstand wind speeds up to 62. 4mph, at which point the