a) I interpret "NO disruption of rail service" as a requirement that the bridge be mostly pre-fab, assembled on site and hoisted over the span. This design precludes that. The enclosed part could be pre-fabricated but the complexity of this design would require closing down part or whole of the rail corridor for long periods, even if just to build a temporary protective wooden deck (which would be complex on its own).Guidelines
RAIL TRAFFIC: regardless of the construction methodology you choose, this bridge must be â€œbuildableâ€ with NO disruption of rail service.
BRIDGE DESIGN: for the purposes of this charette, your bridge design should be â€œbuildableâ€ for $10 million or less.
i) Type: cable-stayed, suspension, arch, girder, hybrid or even an inspired version of the box truss. Itâ€™s up to you as long as it can be built within the budget with no disruption of rail service. Your design can be clear span or you can take advantage of the proposed supporting pier in the existing plans. End users are pedestrians and cyclists
ii) Special requirements: the bridge deck must be partially or completely enclosed (glazing, screens etc.) to prevent access to the rail corridor.
Marcus, I mentioned Fort York very purposely. I always have -- indeed within my own proposal -- as its method of construction is what inspired my own proposal. To be fair, I did place a legend below the image you mention stating that it was for structural demonstration only. I guess I didn't follow the correct procedure of quoting the original artist, and for that I apologize. Lesson learned.Hi MetroMan,
Funny though that you mentioned the Fort York proposal and rules in the same post. In your submission you used an image of the Fort York proposal by Du toit Allsopp Hillier without giving proper credit. If that was done for an assignement in university, you would receive at the bare minimum a zero, but more likely some disciplinary action. It happened to someone in my Urban Design class and it was not pretty. I understand it was your intent to use the image as an example of your vision, one that I liked very much with how you incorporated the parking lot on the north side of Front St. It is just unfair to O.R.E. and all the other designers that you quote the rules when you yourself committed what some believe is a more serious offense.
These are all good points. When I looked at these proposals I tried to evaluate them from a practical perspective, rather than just going with the ones I thought looked the best.Marcus, I mentioned Fort York very purposely. I always have -- indeed within my own proposal -- as its method of construction is what inspired my own proposal. To be fair, I did place a legend below the image you mention stating that it was for structural demonstration only. I guess I didn't follow the correct procedure of quoting the original artist, and for that I apologize. Lesson learned.
As for skipping over the rules, I guess UT did call them Guidelines and not rules. Guidelines can be construed as suggestions.
I interpreted them as "Rules" which is why my proposal suggested the Fort York example as a method of building the bridge cheaply and with little to no disruption of rail service. I even went as far as detailing the method of construction to avoid disruptions. The design also encloses the bridge from interference with the track/trains below. I left the beautification of the bridge to the best cheap:beauty ratio of exterior envelope/cladding available: Nature. I made a very conscious effort to follow the guidelines, thinking they were strict rules.
That all said, I'm perfectly aware that this was a "fun" activity meant to stir some thoughts and get the word out and keep CityPlace, Adam Vaughan and the city in check with what they build here.
Congratulations to UT and the organizers of the Charette because it did get at the very least Adam Vaughan's attention and had him put in writing that we won't get a box truss bridge.
I was very impressed with many of the proposals and hope that O.R.E. strongly considers proposing this bridge to future RFPs. I think the tremendous work put into it shouldn't be in vain and hope that scenarios appear where they could put forward the Braided Strands (in Toronto preferably).