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  #701  
Old Posted Sep 6, 2022, 4:03 AM
worldtrade2021 worldtrade2021 is offline
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One WTC on a clear blue day by Kevin Bellera, uploaded September 1, 2022

Great (as of now) rare shots of the East Plaza from 3:16 to 3:45 near the end of the video.
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  #702  
Old Posted Sep 8, 2022, 5:41 PM
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@valeriosaracino
https://www.instagram.com/p/CiPv2ZqjUB7/

Reflection of moonlight in the glass on a southwest portion of One WTC, with the Tribute in Light visible to the south.

@nypicsdaily
https://www.instagram.com/p/CiPbR8nOsol/

Uncommonly pictured angle of One WTC and the Federal Post Office Building at 100 Vesey Street.

@mchlanglo793
https://www.instagram.com/p/CiQG0YJuXOE/

View during a clear blue sky in late Summer 2022 looking directly west at the One WTC, the PAC and WTC site from Church Street.

@johnpei5624
https://www.instagram.com/p/CiO_UyBOoU0/

Aerial view of the WTC site in late Summer 2022 looking northeast.

@tribecaphotographer
https://www.instagram.com/p/Ch7W5U8OV46/

Aerial view of the WTC site in late Summer 2022 looking southwest

@tribecaphotographer
https://www.instagram.com/p/CiP7tEXuTXa/

Aerial view of the WTC at night in early September 2022 looking south, with Tribute in Light visible.

Aerials of One WTC, PAC, 3 WTC, 4 WTC, 2 WTC site as of Summer 2022

https://www.loopnet.com/Listing/One-...k-NY/26278324/






Last edited by worldtrade2021; Sep 8, 2022 at 6:19 PM.
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  #703  
Old Posted Sep 12, 2022, 6:33 AM
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The tapering design of One WTC (which regrettably takes away a lot of its bulk at higher levels) is mentioned as an example of aerodynamically efficient design in this paper
https://www.researchgate.net/publica...tall_buildings

Quote:
2. Research Methods , pages 189 through 190
When a tower is tapered, its outer surface area, where the wind load is exposed, decreases at higher levels, and increases at lower levels. As wind pressure increases slowly upwards and decreases rapidly downwards, lateral shear forces and overturning moments decrease as the tapered angle increases.

For tall buildings, the lock-in phenomenon caused by vortex shedding is often the most important structural design condition. Tapered forms help prevent tall and supertall towers from shedding organized alternating vortices, due to the constantly changing plan dimensions across the height of the building. Thus, tapered structures are less sensitive to across-wind direction vibrations than high-rise towers with square cross sections.

Tapered forms mitigate the drag force owing to their geometric properties. Due to the increased size in the downward direction, the downwash phenomenon slows down less rapidly, and the upward flow accelerates at a higher speed due to the smaller width. This results in a lower pressure coefficient near the bottom and a larger pressure coefficient at the upper level compared to the reference square form.
Quote:
4. Discussion and conclusions , pages 192 through 193
Although the supertall building forms are primarily determined by site conditions, economic parameters, and architectural and engineering features, the design should be made by considering the aerodynamic properties of the building form. This is because even a small change in geometric shape can provide a significant advantage over wind-induced lateral loads. In this context, the tapered form is one of the most preferred building forms and enables the supertall tower to exhibit an effective behavior against wind loads. To provide this, the sample group included 17 cases that used the tapering effect with aerodynamic design concerns, some of which were accompanied by corner modifications.
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  #704  
Old Posted Sep 13, 2022, 5:59 AM
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If anyone wants to view some simply incredibly 9/11 footage you need to check out the channel EnhancedWTCVideos on YouTube. Literally the best source for raw footage from that day. I’m in my phone so I can’t post the bbc code but anyways, here’s a link.

https://youtu.be/c7mf4W8kL4s
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  #705  
Old Posted Sep 13, 2022, 7:32 AM
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  #706  
Old Posted Sep 17, 2022, 12:07 PM
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In my latest video some nice close-ups of ONE WTC from Brooklyn Bridge Park, BY NYCSKYSCRAPERS2020: https://www.youtube.com/watch?v=QaKxKeGunAk&t=47s
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  #707  
Old Posted Sep 20, 2022, 6:25 AM
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Base of One WTC as viewed from the northwest near 125 Barclay Street
From: https://newyorkyimby.com/2022/09/ren...manhattan.html

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  #708  
Old Posted Sep 22, 2022, 1:40 AM
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  #709  
Old Posted Sep 26, 2022, 12:20 AM
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  #710  
Old Posted Sep 28, 2022, 2:45 AM
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  #711  
Old Posted Oct 21, 2022, 2:51 PM
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Saw this on New York YIMBY forums:

https://therealdeal.com/2022/10/19/d...=feature_posts

Quote:
Durst invests in robotic window washer
Skyline Robotics will hone technology on developer’s diverse city buildings
New York /
October 19, 2022 08:45 AM
By Joe Lovinger


New York is home to some of the most advanced high-rises in the world, but still relies on dangling men with squeegees to keep their glass facades clean. The Durst Organization and Skyline Robotics aim to change that.

The Tel-Aviv-based tech firm designs automated window-cleaning robots that look like Swiffers on steroids. The orange machines are shaped like arms with water jets and squeegee pads for hands. As they descend skyscrapers in metal baskets, they spritz and wipe — like their human predecessors have for decades, but with no need for bathroom breaks or occasional rescues.

Still in the startup phase, Skyline has received a boost from Durst Ventures, the proptech and venture capital arm of the Durst Organization.

Durst and Skyline declined to disclose the size of the investment, but Skyline CEO Michael Brown said it comes with the intention of deploying Skyline’s technology across Durst’s New York properties. Skyline is mapping out the firm’s facades, including at the 1,776-foot One World Trade Center.

The former Freedom Tower has dealt with cleaning difficulties in the past, including a 2014 incident in which two window washers were stuck for over an hour on a dangling scaffold at the 69th floor. Skyline, whose advisory board includes Silverstein Properties CEO Marty Burger, aims to start robotic cleanings there around March.

The deal is Skyline’s largest step in breaking into the city’s highly regulated maintenance business. It still has a long way to go before the city’s skyscraper facades are whizzing with robotic maids. Before the Durst investment, the company had raised a modest $9.5 million, including a $6.5 million seed round, according to Crunchbase.

A spokesperson for Durst, whose website lists 20 properties in the city, declined to comment.

Skyline faces the same hurdles as other proptech firms looking to change the construction business, notably organized labor and regulators. In New York, construction is a major business for unions, and any technology that could replace humans with robots is bound to trigger a conversation with them.

Skyline was not oblivious to that. In November, it signed a distribution deal with Platinum Inc., a New York construction services firm that claims to serve more than half of the city’s Class A office buildings. As a union shop, it connects the robotics company to some of the city’s most powerful unions. Last year, window cleaners represented by 32BJ SEIU reached a three-year deal with the Realty Advisory Board on Labor Relations.

The traditional window cleaning team consists of two people in the basket working the squeegees and a third person on the roof. Skyline’s Ozmo requires a single human operator who earns a higher wage as a robot technician. A window cleaner moving to that role would need to be trained as a technician.

Brown said the robots will free up a dwindling cleaner workforce to take on other assignments.

“Those two other people are not out of work — [they] are picking up the jobs that [the union] can’t fill,” he said. A spokesperson for the union did not comment by press time.

Some window cleaners undoubtedly would not mind a different gig. They work out of baskets that dangle dozens of stories in the air — a far hotter, windier and scarier workplace than the average.

While window cleaners are not particularly prone to accidents relative to other construction and maintenance workers, the consequences of one can be grave: More than half have been fatal, according to OSHA records of the 102 window cleaning accidents in the U.S. reported to the agency in the past 20 years.

New York’s labor laws — such as the so-called scaffold law, which covers gravity-related accidents — include specific protections for window cleaners. That contributes to big lawsuit settlements and exceptionally high insurance costs for building owners and contractors.

“You really have to prove very little to make out such a case,” said Kenneth Wilhelm, a New York personal injury attorney. “The window washer could be 99 percent at fault, but if the owner or manager is just 1 percent at fault, then the window washer can recover 100 percent of their damages from the owner or manager.”

Subcontracting out the cleaning job does not spare an owner from liability, Wilhelm added.

If the window cleaning venture works out, Brown says Skyline wants to expand into polishing, masonry and inspecting.

“Window washing for us is really only the beginning,” Brown said. “We want to own the whole facade.”
The twin towers apparently had robotic window washing machines, so this development that is currently scheduled to be rolled out next year would be bringing window washing maintenance capabilities on One WTC up to date. A long time coming imo, manual window washing on One WTC has been something very much in need of a technological fix.
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  #712  
Old Posted Oct 27, 2022, 3:07 AM
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“Office buildings are our factories – whether for tech, creative or traditional industries we must continue to grow our modern factories to create new jobs,” said United States Senator Chuck Schumer.
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  #713  
Old Posted Nov 21, 2022, 4:51 AM
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@tompitts_md
https://www.instagram.com/p/ClG6Ajou-wJ/

A look at the WTC site during the morning near the intersection of Church and Fulton Streets

@rickwesleyofficialpage
https://www.instagram.com/p/ClB_dtrM2lh/

Main WTC site viewed from the current site of where 5 WTC will be built

@neil_liu12
https://www.instagram.com/p/ClJxRbAuhiN/

Looking up at pedestrian traffic and One WTC from West Street

@m.f.g_photography_
https://www.instagram.com/p/ClAFfArOKHO/

Looking up at One WTC from the entrance of the Oculus Beer Garden

@clickzbynik
https://www.instagram.com/p/Ck1CKCkJkj6/

WTC night lights

@cats_photomoments
https://www.instagram.com/p/Ck0tLS7OrUR/

Looking up from Vesey Street at 7 WTC, PAC and One WTC

@goutamchak
https://www.instagram.com/p/Ckz_huLOFSm/

One WTC and the PAC in the early morning

@happy.taiwan
https://www.instagram.com/p/CkyX30Xp3h3/

Looking up at One WTC, 7 WTC and the PAC from the southern end of the east plaza in front of One WTC

@massimo.aschettino
https://www.instagram.com/p/CktlQvmNx4r/

Looking up at One WTC from the northwest portion of the 9/11 memorial

@traveling_for_the_art_of_stay
https://www.instagram.com/p/CktDyRyOZcl/

Looking at One WTC and the PAC from the southeast corner of the north pool

@humbertovidalart
https://www.instagram.com/p/CktBdNXLxcN/

Night lights of Lower Manhattan and the WTC site viewed from Hudson Yards

@ralphb75
https://www.instagram.com/p/CkjQ_PJrCTX/

Puffy clouds reflected in facades of One WTC and 7 WTC

@morbraz.bzh
https://www.instagram.com/p/CkeeJ_HKEZE/

Looking up at autumn foliage on honeylocust trees and the east face of One WTC in the east plaza of One WTC

@simonehjj
https://www.instagram.com/p/CkZLY-nptoR/

Looking up at autumn foliage on swamp white oak trees and One WTC and the PAC, as viewed from the north central part of the 9/11 memorial near Fulton Street

@felicepeluso
https://www.instagram.com/p/CkAcIyTvaPG/

Looking up at PAC, One WTC and 7 WTC

@felicepeluso
https://www.instagram.com/p/CkAciH-PjFu/

Looking further up at PAC, One WTC and 7 WTC

@angel_ortizpand
@drawingwlightphoto
https://www.instagram.com/p/Cj0o8w6uR_r/

Looking at the base of One WTC near intersection of Vesey and West Streets

@hubert.g_ek
https://www.instagram.com/p/Cjv27Ehv9WB/

One WTC, St. Nicholas Greek Orthodox Church, 3 WTC and 4 WTC, viewed looking north from the site of where 5 WTC will be built

@eliscarriero
https://www.instagram.com/p/CjfZLhwPKrk/

PAC, One WTC and 7 WTC viewed from southern end of Silverstein Plaza in front of 7 WTC

@kmbarden
https://www.instagram.com/p/CjDqOgxujBt/

140 West Street, 7 WTC, PAC and One WTC from West Street

@street_walker_walkaholic
https://www.instagram.com/p/Ci9cACAOjHH/

Looking up at One WTC from West Street at dusk with lighting from podium base and curtainwall glass

@f_mcgady_photography
https://www.instagram.com/p/CiylPVNrQB5/

Predawn view of WTC site taken near the intersection of Church and Fulton Streets, with Oculus, One WTC, PAC and 7 WTC visible
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  #714  
Old Posted Nov 22, 2022, 9:58 PM
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@khristiangarcia
https://www.instagram.com/p/ClRxklbuZEx/

One WTC and 7 WTC from Barclay Street

@fedecanu777
https://www.instagram.com/p/ClRhJVeOVgG/

An angle of One WTC and the PAC that is becoming imposing in its own right on clear blue sky mornings

@mathieu_hibou
https://www.instagram.com/p/ClOxfffIREp/

One WTC and other buildings on the WTC complex like 3 WTC and 4 WTC shrouded in low clouds

@nghiemav
https://www.instagram.com/p/ClQmSR4tx4e/

One WTC from the 9/11 memorial on the evening of (presumably) October 31 2022
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  #715  
Old Posted Nov 27, 2022, 4:15 PM
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“Office buildings are our factories – whether for tech, creative or traditional industries we must continue to grow our modern factories to create new jobs,” said United States Senator Chuck Schumer.
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