INNOVATION July-August 2013

Neptune Terminal Escape Tunnel

Ocean Pipe’s engineers designed and super- vised the manufacturing of 57.5 m of 2,400 mm diameter precast concrete pipe to be used as an emergency escape tunnel under a new material storage building at Neptune Terminals in North Vancouver. LNS Services, the design-build con- tractor for the project, chose precast concrete pipe as it reduced the cost of bedding material and compaction requirements when compared to other competitive materials. Structural design engineers Sacré-Davey Engineering required the pipe to withstand two very different load conditions: the surcharge load of a 20 m pile of

material when the storage building was full, and the impact of machinery driving directly on the top slab of the tunnel when the build- ing was empty. Precast concrete pipe was chosen versus cast-in-place concrete to minimize installation time and product quality risk during winter installation conditions.

Professionals involved: Colin Cameron, P.Eng.; Joel Angustia, P.Eng.; Larry Sunnus, P.Eng.; Andrew Cortese, EIT.

Nazko Water Treatment Plant The Nazko First Nation, located 100 km west of Quesnel, obtains its domestic water from a groundwater source. It retained Kerr Wood Leidal Associates to design and construct a new water treatment plant that would remove arsenic, manganese and organic matter from the groundwater. Because of the community’s remote location, the overall objec- tive was to design a treatment plant that was easy to run and simple to maintain without compromising treatment quality. The treatment technology used removes contaminants via pressurized adsorption vessels. It is a passive system that does not require daily operator adjustment. Remote monitoring technology allows the operator to view the performance of the plant online. Standby power is provided via a propane generator. The plant provides simple yet effective treatment while incorporating the conveniences of modern automation, control, and monitoring.

Owner: Nazko First Nation. Consultant: Kerr Wood Leidal Associates. Contractor: Greyback Construction.

St. George’s School, Vancouver

Before

The re-roofing of this 100-year-old heritage building is being completed in three phases with the goals of improving air tightness, thermal performance, water tightness, and aesthetics. The original slate roof had been replaced with concrete tile dur- ing previous re-roofing projects and was showing significant signs of deterioration. As well, as shown in the “before” photo, the roof was not air tight and had very little insulating value. With the constraints of the existing parapet heights and built-in gutters, pre-manufactured ventilated insulation panels were used over a self-adhered bituminous membrane to achieve the improvement in air tightness and thermal performance visible in the “after” photo. The roof was then finished with asphalt shingles to replicate the original slate. Owner: St. George’s School Foundation. General contractor:  Halse-Martin Construction Co. Roofing Consultant: Wells Klein Consulting. Prime and building envelope consultant:  Read Jones Christoffersen.

after

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