Quote:
Originally Posted by H2O
You have to use speed ramps on one edge of the garage and have all the floor plates flat. This configuration requires a larger site, as it is not as an efficient use of space. The smaller the footprint, the greater the need for ramps to do double duty as drive aisles. That is why you see a lot of double helix configurations downtown. The flat floor plates also need to have higher than normal floor-to-floor heights.
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The Riverbend garage next to Shilo's in San Antonio is a good example. It's not a double helix; it's two individual corkscrews, so the floorplates don't need to be as high. It's a tradeoff in that way.
https://www.google.com/maps/place/Ma...2!4d-98.489384
But I agree that this is a more forward thinking style. But it costs more, so developers don't often do it except for high-use garages such as Sea-Tac Airport.
https://traveljee.com/wp-content/upl...t-parking1.jpg