Cliffwalk at the Capilano Suspension Bridge

Cliffwalk at the Capilano Suspension Bridge


My name is Ruby, Ruby Kwan, and I work with
Morrison Hershfield as a Bridge and Structural engineer. For
the role of the project I was responsible for structural design for
all the components, including the main galvanized steel beams. I’m Kent LaRose, I
work at Morrison Hirshfield, senior bridge engineer. I was the engineer of
record for the Capilano Cliff Walk. The background behind the Capilano Cliff
walk is that it’s used to get the visitors at Capilano down onto the cliff
face and provide a very unique experience, almost like you give them the
experience of rock climbing without having to have the skill or the
equipment. There was a number of components that was galvanized on the
cliff walk: the main structural members, the HSS, the spiral steel staircase was hot-
dip galvanized and that was a duplex coating system that was painted
afterwards, the DYWIDAG rock anchors were galvanized, the bolts were
galvanized, cotter pins were galvanized, just about everything on the cliff walk
was galvanized. There was approximately 50 tons of steel used in the project, and
just a touch over 40 was hot dip galvanized. Most of the structural
components are steel and also in this humid rainforest environment, we want to
have something that’s more durable and easy to maintain,
so galvanized became a very obvious choice. One of the main reasons we chose
to galvanize is that we wanted our grandchildren’s grandchildren to enjoy
the park, and this is definitely gonna last more than a hundred years when you look
around at the Capilano Suspension Bridge you look at their vision for their
business model sustainability is huge in it. In fact one of the things that we
were so concerned about sustainability was that we included the David Suzuki
Foundation in overlaying the educational component on the cliff walk and because
steel is one of the most recycled products on the planet, and it’s easy to
protect it for a significant amount of time, with a cost-effective hot-dip
galvanizing that has no maintenance it became a very plain choice at the
end of the day. If I could redesign and rebuild the Capilano Cliff
Walk we would definitely use hot-dip galvanized steel, the only difference is
I’d make it longer and wider and higher that would be about it but I think it’s
kind of pretty perfect the way it is.

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