Cover and roofs
The roof construction of all Horseley Bridge tanks is designed to support the weight of maintenance personnel and their equipment. Design superimposed load is 0.75kN per m2.
Flat covers can be provided for use inside buildings. Pitched roofs are recommended for outdoor use to allow rainwater to run off. All roofs are fitted with a lockable 600mm2 hinged and sealed manhole. Screened (0.65mm mesh) cowl ventilators are provided as standard.
The ends of pitched roofs are closed with stiffened gable fillers which are bolted to the roof and wall plates.
All joints incorporate jointing strip to make them weather and vermin proof.
Pressed steel tanks are not designated as pressure vessels, but in special circumstances the roof can be constructed from standard plates to allow a slight internal pressure. If this is required, please consult our engineering department.
