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Old August 19th, 2014, 10:54 AM   #1341
Cal_Escapee
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It's not a mall, it's the new Transbay (bus/train) Terminal to which the tower is attached (they were designed together and are being built together--the city is building the terminal and sold the land for the tower to its private developer). On the second level will be the busses across the Bay to Oakland and below ground will be the CalTrain commuter trains (down the peninsula to San Jose/Silicon Valley) and, eventually we hope, the California HSR trains to Los Angeles and San Diego (the HSR line is supposed to begin construction of its first segment any day now in the Central Valley north of Bakersfield though between San Francisco and San Jose it will use the same tracks as the CalTrain). The terminal has 6 rail platforms. See http://www.skyscrapercity.com/showthread.php?t=902890

Both Salesforce Tower and the above-shown 181 Fremont tower have "sky bridge" access to the rooftop park of the Terminal.
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Old August 27th, 2014, 10:52 PM   #1342
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In the wake of Sunday's earthquake centered about 50 km north of San Francisco (and which was felt strongly enough in the city to nearly toss me out of bed), some considerations:

Quote:
More than a dozen towers are under construction or recently completed in downtown San Francisco, which is more than 30 miles from the epicenter of Sunday's 6.0 temblor. Almost all of them were designed using a process known as performance-based design . . . .

The main structural advantage is that this allows towers to be built without horizontal beams - known as moment frames - on the outer edge of each floor. Instead, seismic strength is concentrated within the vertical core of the structure . . . .

"When the ground shakes violently, instead of swaying, tall towers can actually buggy-whip back and forth (unevenly)," Klemencic said. "Peak stresses may not be at ground level but halfway up the building. ... The building code doesn't recognize that."

Salesforce Tower, like One Rincon, has no moment frame to thicken the exteriors of the structure's 61 floors. The design was approved by the city after several sessions with a peer review panel consisting of a ground motion specialist, a practicing structural engineer and an academic with expertise in current seismic research.

The review focused on how the tower would ride out an 8.0 temblor, which is rated as the "maximum credible earthquake" for the Bay Area.

Magnusson Klemencic ran computer simulations that set the designed high-rise on the same soil conditions as the building site at First and Mission. And they tested it against not one possible earthquake, but 22 temblors modeled on actual quakes that occurred in the past on a range of Bay Area faults, including the San Andreas Fault, where the 1906 earthquake hit with an estimated 7.6 force . . . .

Even if a tower doesn't collapse or snap in two, there's another visceral fear: pieces of the skin will pop off and rain down on passersby, especially with today's craze for glass-covered shafts.

But damage of this sort wasn't seen with modern towers during the 1989 Loma Prieta earthquake, where high-rises built since the 1950s shrugged off the 7.1 earthquake without shedding their skins.

The reason why, say engineers, is that towers are clad in "curtain walls" - pre-assembled panels that are attached to the structure on-site. The panels move independently of one another, connected to an interior frame.

"Panels can shift - you don't see that," said Mark Sarkisian, a partner at Skidmore Owings & Merrill, which served as architect and structural engineer for 350 Mission St. "They're designed to allow and accommodate movement," rather than act as a solid wall that could buckle or snap, as was the case with windows in Napa and Vallejo during Sunday's quake.

If panes of glass somehow did come loose, the worst-case scenario, there's another protective mechanism. They'd shatter along the lines of a car window, as beads rather than shards . . . .
http://www.sfgate.com/bayarea/place/...pa-5714511.php
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Old August 30th, 2014, 02:51 AM   #1343
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Still nothing much to see:



But today I gathered some intelligence from what I believe a reliable source:

The caissons are complete and excavation will begin the middle of next month, approximately Sept. 15. There has been a delay because some of the caissons had voids--bubbles in the concrete--that had to be repaired before work could proceed.
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Old September 16th, 2014, 11:46 AM   #1344
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So, did the excavations begin?
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Old September 17th, 2014, 06:16 PM   #1345
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another tower which is not truly u/c
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Old September 19th, 2014, 08:34 AM   #1346
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Quote:
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another tower which is not truly u/c
It is under construction by most standards. They already spent months building 40 concrete caissons, which reach nearly 300 feet below ground level. They're now done and ready to finish the hole and start on the rest of the building.
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Old September 19th, 2014, 09:45 AM   #1347
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Quote:
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another tower which is not truly u/c
If any fragment of the building that will remain in place permanently has been placed, it is under construction. This includes foundations.
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Old September 24th, 2014, 11:14 PM   #1348
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Transbay Transit Center’s future in doubt after deal falls apart
http://www.sfgate.com/bayarea/articl...er-5775879.php

"An agreement between San Francisco officials and downtown developers over a proposed tax district collapsed this week, throwing into jeopardy the future of the Transbay Transit Center, the extension of Caltrain downtown and the construction of half a dozen skyscrapers, including one that’s set to be the largest on the West Coast."

=======================================================

I'm unsure how worried we should be about this but anytime parties walk away screaming "we'll see you in court!!!" --- Does not bode well. The SF and Bay Area economy is going gangbusters right now and I sincerely hope they can sort this out.
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Old September 25th, 2014, 12:34 AM   #1349
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Well, that isn't good news. Hopefully it doesn't bode negatively for this project.
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Old September 25th, 2014, 09:55 PM   #1350
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Probably more for future projects, I guess.
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Old September 26th, 2014, 02:01 AM   #1351
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Old September 26th, 2014, 03:13 AM   #1352
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What is HSR train? Is it somekind of fast train?
High speed rail.
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Old September 26th, 2014, 03:13 AM   #1353
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What is HSR train? Is it somekind of fast train?
Yes, California high speed rail

http://www.hsr.ca.gov/
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Old September 28th, 2014, 09:37 PM   #1354
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Let's hope this one gets built, it would be a pity if not. :/
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Old September 29th, 2014, 03:29 AM   #1355
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Quote:
Originally Posted by ABQ_X-PAT View Post
construction of half a dozen skyscrapers, including one that’s set to be the largest on the West Coast."
Really wish they would shut up about that. That title is going to the already rising Wilshire Grand. Spires count, it did for 1 WTC, and it will for Wilshire Grand.
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Old October 2nd, 2014, 02:03 AM   #1356
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Really wish they would shut up about that. That title is going to the already rising Wilshire Grand. Spires count, it did for 1 WTC, and it will for Wilshire Grand.
Technically the spire counts according to the new definition but come on now.. rooftops over needles and spires. its just a shame they add needles to the height of the building when we all now that salesforce is going to look much larger and intimidating then that giant cell phone theyre building in LA
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Old October 2nd, 2014, 03:51 AM   #1357
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Quote:
Originally Posted by tspoon91 View Post
Technically the spire counts according to the new definition but come on now.. rooftops over needles and spires. its just a shame they add needles to the height of the building when we all now that salesforce is going to look much larger and intimidating then that giant cell phone theyre building in LA
all right then, US Bank will still be the tallest, 1018 ft roof, compared to 970 ft roof of TBTT, and 940 ft WG tower roof
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Old October 2nd, 2014, 05:16 AM   #1358
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all right then, US Bank will still be the tallest, 1018 ft roof, compared to 970 ft roof of TBTT, and 940 ft WG tower roof
but the transbay tower's pinnacle height is flat at the top (which is not like a basic spire or needle but more like a rooftop so it looks 1070 ft witchout having a needle atop
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Old October 3rd, 2014, 12:10 AM   #1359
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Can we get some updated pictures of the site? It would be nice to see if excavation has started.
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Old October 7th, 2014, 07:32 PM   #1360
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Can we get some updated pictures of the site? It would be nice to see if excavation has started.
Here's the construction webcam:

http://transbaycenter.org/constructi...mission-camera

No excavation yet.
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