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I wonder if they'll keep the Colorado Street sidewalk open during construction. If so, that's going to be quite a view of the tower crane. Look how close it is to the sidewalk.
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Crane porn Kevin? What's the most sensitive part of your body when you are watching porn at home? Your ears...
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Is the extension on the mobile crane just guyed? There doesn't seem to be any structural strength between the telescoping part and the framework extension (apologies for the inaccurate terminology).
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The mobile crane of course has its steel cable which is what the hook is suspended from. That runs from a spool on the cab/base with a motor and up the boom over a pulley connected to the hook.
The backside of the boom has those two "wings". Attached to them are two cables that are connected to the boom with a pulley. Those cables go down to the base of the crane with another motorized pulley. So when the crane is lifting a load, that motorized pulley pulls those cables taught. The tension keeps the load balanced so that it doesn't tip too much in one direction. The base/cab/truck of the crane also has outriggers giving it a larger platform for more stability. The telescoping part of the boom is "telescoped" or shortened for transport. The piston part of the crane boom can be shortened to the length of the crane truck so that the crane be driven on public streets. The lattice part of the crane on the very end is removed and transported on a flatbed truck. It assembles pretty much the same way a tower crane does using huge steel pins to keep both pieces together. The lattice section is attached using another mobile crane. Some of these mobile cranes are able to lift up to 130 tons. Even when they're lifting tower crane pieces like this, they're likely only lifting a fraction of what they can lift. Most city buses for instance weigh between 11 and 14 tons. If you check out the JW Marriott construction cam, you can see the construction/deconstruction of the mobile crane. They took it apart on July 7. http://oxblue.com/open/tournee/jwmarriottaustin |
The Marriott cam shows this tower is officially starting to rise. I see 6 column forms out there.
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I'm pretty sure it's just the rebar for the columns that's up. I don't think any have been poured yet. I took this photo last week and it looks pretty much like what I see on the Marriott cam.
http://i.imgur.com/cKKEIIO.jpg |
Yeah, that's what I saw when I posted.
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First column is up! And some more foundation work. You can see it via the JW Marriott construction cam on the left side of the image.
http://oxblue.com/open/tournee/jwmarriottaustin |
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This seems to be progressing fairly quickly now as seen from the JW Marriott webcam.
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11/5
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Am I seeing this correct? I thought from the original drawing that the long sides were north to south. This looks like they are east to west, especially in the next to last photo. If you look at the small rendering at the top of this thread, it looks like its turned 90 degrees now. So is it the narrow or long side that faces Congress? And is the orientation in the rendering above correct?
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