Changes

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.

The roof membrane installed on the SBR is a polymethyl methacrylate (PMMA) membrane, which was liquid-applied and rolled on like paint. By using a liquid-applied membrane, the roof surface has no seams that could lend themselves to leaks on the roof. The SBR has four (4) roof drains and two (2) overflow pipes that direct rainwater to the basement cistern. The roof surface also has two (2) redundant overflow mechanisms called scuppers that can direct rainwater to the foot of the building in the extremely unlikely event that both overflow pipes fail. The SBR is not expected to overflow for over 100 years…

The roof membrane installed on the SBR is a polymethyl methacrylate (PMMA) membrane, which was liquid-applied and rolled on like paint. Because of this, the membrane has no seams that could lend themselves to leaks on the roof. The SBR has four (4) roof drains and two (2) overflow pipes that direct rainwater to the basement cistern. The roof surface also has an '''electric field vector mapping (EFVM®) leak detection system''' and two (2) redundant overflow scuppers that can direct rainwater to the foot of the building in the extremely unlikely event that both overflow pipes fail. The SBR is not expected to overflow for over '''100 years'''…

=='''Station 2 – Modulating Control Valves'''==

=='''Station 2 – Modulating Control Valves'''==