Changes

=='''Station 1 – Roof Surface'''==

=='''Station 1 – Roof Surface'''==

[[File: Roof-Leader-Set-Up-v1.PNG |thumb| Modulating Control Valves stop the flow of rainwater to the basement cistern when they are closed. Rainwater that spills into the emergency overflow pipe bypasses the valves, altogether. (Photo Source: CVC, 2023)]]

[[File: Roof-Leader-Set-Up-v1.PNG |thumb| Modulating control valves stop the flow of rainwater to the basement cistern when they are closed. Rainwater that spills into the emergency overflow pipe bypasses the valves, altogether. (Photo Source: CVC, 2023)]]

By utilizing the roof of Building A for storage, CVC’s head office gains the ability to capture an additional 40,000 L of rainwater. A structural load assessment conducted by WSP Canada concluded that an average depth of 130 mm of rainwater could safely be supported by Building A’s roof assembly. Since Building A’s roof is gently sloping, this corresponds to a depth of 75 mm at the parapet (roof edge) and 250 mm at the roof drains (lowest point). Rainwater can be held on the roof for up to six (6) days. Whether rainwater is retained on the building’s roof or drained into the basement for treatment is determined by the modulating control valves on the building’s third floor.

By utilizing the roof of Building A for storage, CVC’s head office gains the ability to capture an additional 40,000 L of rainwater. A structural load assessment conducted by WSP Canada concluded that an average depth of 130 mm of rainwater could safely be supported by Building A’s roof assembly. Since Building A’s roof is gently sloping, this corresponds to a depth of 75 mm at the parapet (roof edge) and 250 mm at the roof drains (lowest point). Rainwater can be held on the roof for up to six (6) days. Whether rainwater is retained on the building’s roof or drained into the basement for treatment is determined by the modulating control valves on the building’s third floor.