There's a second threat to our democracy – one as old as our nation itself. After my election, there was talk of a post-racial America. Such a vision, however well-intended, was never realistic. For race remains a potent and often divisive force in our society. I've lived long enough to know that race relations are better than they were ten, or twenty, or thirty years ago – you can see it not just in statistics, but in the attitudes of young Americans across the political spectrum.
But we're not where we need to be. All of us have more work to do. After all, if every economic issue is framed as a struggle between a hardworking white middle class and undeserving minorities, then workers of all shades will be left fighting for scraps while the wealthy withdraw further into their private enclaves. If we decline to invest in the children of immigrants, just because they don't look like us, we diminish the prospects of our own children – because those brown kids will represent a larger share of America's workforce. And our economy doesn't have to be a zero-sum game. Last year, incomes rose for all races, all age groups, for men and for women.
You're not the only ones. Michelle – for the past twenty-five years, you've been not only my wife and mother of my children, but my best friend. You took on a role you didn't ask for and made it your own with grace and grit and style and good humor. You made the White House a place that belongs to everybody. And a new generation sets its sights higher because it has you as a role model. You've made me proud. You've made the country proud.


RIVERSIDE - Riverside County supervisors signed off Tuesday, Sept. 18 on a plan drawn up by the Emergency Management Department and designed to ensure that the county, cities, federal and state agencies are working together effectively in the event of a natural or manmade disaster.
According to EMD officials, the plan has a five-year lifespan and is required to be certified by the California Office of Emergency Services, as well as the Federal Emergency Management Agency, in order for the county to qualify for state and federal pre-disaster aid.
Officials noted that since 1965, the county has been the subject of 44 federal disaster declarations related to droughts, earthquakes, floods, wildfires, and similar upheavals.
The plan looks at how future weather shocks and catastrophes might impact different areas of the 7,200-square-mile county and what havoc they might wreak on infrastructure, public safety, medical services, commerce, agriculture, and schools.
Along with natural disasters, the plan puts emphasis on preparing for potential acts of terrorism, large-scale civil disorder, dam failures, and mass contamination from chemical leaks or spills.
However, quakes were at the top of the priority list, which indicated that one or multiple segments of the county -- or locations within what is now county jurisdiction -- have sustained damage from 18 shakers between 1812 and 2010.


text:
September 30, 2021 solaroneusa
Illinois Solar Incentives
Everything you need to know about solar SOLAR INCENTIVES, REBATES, & TAX CREDITS in Illinois
The state of Illinois is offering tons of helpful incentives to those who decide to install solar panels, whether at home or at work. As a consequence, there have been over 465 megawatts (MW) of solar energy installed in Illinois recently, and it's bound to keep growing.
The most attractive solar incentive is definitely the Illinois Solar Renewable Energy Credit (SREC) Program. You can find more information on the solar incentives and available clean energy tax credits at the DSIRE program page for Illinois. (DSIRE is the Database of State Incentives for Renewables and Efficiency®.)
When installing and designing a solar energy system, you have to think about the amount of paperwork involved to get it all up and running. But don't worry! Our efficient and helpful Client Services team will take care of everything, every step of the way. You can find out more by clicking on this Solar One USA link.
Available Incentives for Switching to Solar Energy in Illinois
Solar Credits & Rebates for Illinois
The state of Illinois has been very committed to switching to sustainable and renewable energy. As a matter of fact, an Illinois renewable portfolio standard (RPS) has been drafted and it explains that it aims to increase the renewable energy production by 25% by the year 2025. To assist with this goal, the state of Illinois has been offering some incredible incentives to make the cost of solar in Illinois more affordable.
More Solar Incentives for Illinois
Unfortunately Illinois does not offer a tax credit for installing solar systems as of yet from the State, but there is the federal tax credit and few tax incentives that are worth taking advantage of when you install solar in Illinois. Read more below.
Solar Renewable Energy Credits (SRECs)
Illinois' SREC Program is the top reason to install solar in Illinois. It gives solar energy owners the chance to make money for any extra energy their panels generate. Every megawatt hour (MWh) of solar energy generated by your system and sent to the utility grid is then converted into a credit that you can resell.
Solar Energy Property Tax Incentive
Illinois' Special Assessment for Solar Energy Systems is an incentive that ensures that solar energy systems that are newly installed in Illinois are exempt from a property tax assessment. We surely are aware that a solar system on a property increases value but thankfully this law allows you to take advantage of solar energy without having to pay for it in property tax increases.
This privately owned manufacturing corporation employs 1800 employees in Illinois . This solar system was paid for using the company's tax liability in conjunction with the Federal Tax Credit and Illinois Smart Inverter Rebate. As a result, the company began saving money as soon as the system was operational in June 2021. They have now contracted Solar One to build an additional 15 mW across all of their facilities taking advantage of the larger tax credit to pay for their solar system before it diminishes.
Illinois Net Metering
Under the Illinois net metering policy, utility companies in Illinois will credit you with any excess energy your solar system generates. This helps you "zero-out" your annual energy costs. Net metering enables you to collect credits when your solar energy panels are producing more energy than you use. You can then use those credits when your panels produce less than what you need (like during winter months).
Commercial Rebates for ComEd Customers
If you're a ComEd Utility's commercial customer, you may qualify for commercial and industrial rebates, which will help you decrease the cost of installing solar considerably.. Commercial solar panel systems that have a total capacity of up to 2,000 kilowatt (kW) qualify for a $250 rebate per each kW. That's an incredible $25,000 rebate for a 100 kW system!
Federal Solar Tax Credit (ITC)
The Federal Solar Tax Credit is still 26 percent for construction that started before Dec. 31, 2022.
Like other solar tax credits, with the ITC you can deduct 26% of the cost of your solar energy system from your federal taxes.
In 2023, the ITC will drop to 22%.
Combined with our proprietary energy savings program we provide Illinois businesses the most compelling solar ownership program out there. Contact us today to learn if our program is a fit for your organization.
Energy Savings Program
Solar One USA
Email: doug[at]solaroneusa.org
Our Proprietary Model
OurEnergy.us developed by Simple Tree Digital

redpajama_set_name: RedPajamaCommonCrawl


Maybe the biggest genre of the moment and no end in sight. K-Size "Deep Tools" delivers cool, but pushing beats, infectious melody loops and bass lines which will cause heavy vibrations on every dance floor you can imagine!
Have some time to kill at the airport or in your hotel room? Spending this time finalizing your newest tracks for the next gig can be a great idea.
Or maybe you're just sitting around in the studio looking for that perfect sample pack which will give you instantly the loops you want just now.
The magic word for all of these different scenarios is "K-Size Tools".
"K-Size Tools" is a new sample series that gives you creative kicks just in the moment you need them the most.
And the best thing about it: This almost inexhaustible source of inspiration comes to you at an unbelievable low price.
Forget the endless browsing sessions through dozens of folders on your hard drive.
As usual, K-Size delivers everything you hear in the demo track sorted out in separate folders for instant access (11 kits). No unpleasant surprises ensured!
If you like the demo, relax, grab yourself the sample pack and be sure to find everything in it you just heard. It's that easy!
100x 24-bit WAV Loops at 123 bpm, bonus Kits 89x 24-bit WAV Loops.


Girlstart empowers girls to begin a lifelong love of STEM!
We were excited to help Girlstart prepare items and materials for their summer camps!
"At Girlstart, we cultivate a culture where risk is rewarded, curiosity is encouraged, and creativity is expected.


Varun Beverages uses RFID solution to send right consignment to distributors.
Imagine you are donning the mantle of the distributor of frozen foods—ice cream. You order 100 one liter bricks of Vanilla ice cream and in return you get chocolate ice cream from the manufacturer, which has a higher Stock Keeping Unit (SKU). Won't you press the panic button? Definitely! The same scenario played up with Varun Beverages.
Varun Beverages is the flagship company of the group RJ Corporation, manufacturing ice cream, Creambell, with manufacturing plants in Uttar Pradesh, Goa and Himachal Pradesh. The company was founded in 1985 and is based in Noida, Uttar Pradesh.
"On many occasions, wrong SKUs were being dispatched to distributors, and if the price of dispatched SKU was less than the price of ordered one we used to get a complaint and thus had to give the credit note for the difference," says Kamal Karnatak, Senior Vice President and Group CIO, RJ Corporation.
Karnatak added that the MRP of some SKUs differ than that of other flavors of the similar pack size. While loading the ice-cream on to the refrigerated truck the loader has approximately one minute to check the SKU and load on to the truck.
In their warehouse—the cold room—ice-creams are kept at very low temperature (up to -16 degree centigrade) and it is humanly impossible to remain there for more than 3-4 minutes. They take the physical stock of the cold room only once or twice in a year during season time when the cold room inventory is the lowest. Consequently, during such stock taking there used to be a huge disparity between book stock and physical stock.
With this thorny issue in mind, Karnatak and his IT team got to the bottom of the problem to find a solution. Theirs was a eureka moment! An RFID based solution could thaw their problems.
This RFID based automation solution works at the production shop floor, in the cold room and at the time of dispatch. At the moment, RFID-based solution has been implemented only in Uttar Pradesh.
In a bubbly mood, he says, "We have implemented an in-house developed .net based solution which is integrated with SAP on real time basis to shop floor control system. It has changed various existing processes." Karnatak highlights that they took the help of a local service provider for developing .net based software.
With a lot of excitement, he says that as per the new process RFID tags are associated for the different production runs. "For example - if we need to produce 1000 crates of 50 ml cups of vanilla ice cream, we would attach 1000 RFID tags on the empty crates. As soon as the crate is filled with boxes after production, it would move to the cold room and the clerk reads the RFID tag, through a handheld reader, which would tell him everything about the product," explains Karnatak.
Once the material is received at the cold room, the cold room inventory is automatically updated in local software at the plant and later on through a Business Application Programming Interface in SAP located at the corporate office. Then, crates would come through the conveyer for dispatch. After which, one static RFID reader is placed which will read the RFID tag and compare it with the order which was given by the customer. "If there is a mismatch a red light would flash and the loader would remove that crate from the incoming conveyer to the return conveyer to finally go back to the cold room. Once the material is passed through the reader, loader would remove the RFID tag before loading the crate into the truck," he says.
With a good amount of pride, he says, the project was conceived by him and the IT team played an important role in integrating the software with SAP. They began working on this project last year and did their first pilot project this year in February. However, there were few hurdles: high cost of RFID tags, sustainability of RFID tags in extreme temperature, and integration of the software with SAP. "To overcome this obstacle, we spoke to the supplier and asked for low temperature plastic tags," chimes in Karnatak.
We have gained tremendously with this project. "The amount of credit note generated due to wrong dispatch in a period came down to 48 lacs in six months," he says.
There is a substantial saving due to reduction in mismatched inventory, reduction in warehouse management cost and faster loading time, which thus leads to more truck dispatches in a day.


text:
Home Around the province $25 million Robarts Library expansion takes shape
$25 million Robarts Library expansion takes shape
Vaughan-based Harbridge + Cross Ltd. has been making progress in the $25 million construction project to expand the University of Toronto's Robarts Library.
The 4,304 sq. m. five-story addition, to be known as the Robarts Common, has been designed by Diamond Schmitt Architects.
DataBid.com, quoting Urban Toronto, says the structural steel assembly for the new build's north and south ends has already been completed. These separate work areas are now being joined by steel work in the middle and the two lowest levels are now structurally complete. Work is now beginning for the mechanical penthouse level above the five levels that are mostly in place.
The report also says installation of the floating staircases that will serve as a key design and circulation element is well underway. The staircases will connect the ground level with the base of the fifth floor.
Construction is expected to be finished next year and the completed addition will add 1,222 work and study spaces to the facility. This will increase the library's capacity to more than 6,000 seats and will enable the building to be open 24/7 during peak times. An atrium with a cafe will also be included at the south entrance.
The addition will feature glazed surfaces which will allow uninterrupted views both into and out of the building.
Most of the construction has taken place outside of Robarts and since no study spaces had to be closed, there will be minimal disruption during construction.
DataBid reports the project's mechanical and electrical engineering consultant is Smith & Andersen Consulting Engineers.
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text:
Q: Does stream::seekoff update the input sequence? In [filebuf.virtuals]:

pos_type seekoff(off_type off, ios_base::seekdir way,
                 ios_base::openmode which
                   = ios_base::in | ios_base::out) override;

Effects: Let width denote a_codecvt.encoding(). If is_open() == false, or off != 0 && width <= 0, then the positioning operation fails. Otherwise, if way != basic_ios::cur or off != 0, and if the last operation was output, then update the output sequence and write any unshift sequence. Next, seek to the new position: if width > 0, call fseek(file, width * off, whence), otherwise call fseek(file, 0, whence).

It does not mention that this function updates the input sequence. As a contrast, seekpos does update the input sequence:

pos_type seekpos(pos_type sp,
                 ios_base::openmode which
                   = ios_base::in | ios_base::out) override;

Alters the file position, if possible, to correspond to the position stored in sp (as described below). Altering the file position performs as follows:

*

*if (om & ios_base::out) != 0, then update the output sequence and write any unshift sequence;

*set the file position to sp as if by a call to fsetpos;

*if (om & ios_base::in) != 0, then update the input sequence;

So is seekoff guaranteed to update the input sequence?
For a concrete example, consider:
#include <fstream>
#include <iostream>

int main()
{
    std::fstream f("test.txt"); // test.txt contains "test"
    char ch;
    f >> ch;
    f.rdbuf()->pubseekoff(0, std::ios_base::beg);
    f >> ch;
    std::cout << ch;
}

Is the program guaranteed to output t?

A: I can see your point friend, and indeed this may be a source of some confusion not only for yourself.
Short answer:
Yes, seekoff will update the the input sequence just as seekpos will. Both seekoff and seekpos behave the same regarding which sequence is being updated by the call, input or output (or both).
Long explanation:
Not by way of convention alone, but according to the standard itself, the behavior of both seekoff and seekpos is defined to be dependent of the ios_base::openmode which argument. As can be seen in another class template, stringbuf, derived from the same parent as filebuf, the override for seekoff explicitly states that for (which & ios_base::in) == ios_base::in the call will position the input sequence; for (which & ios_base::out) == ios_base::out the call will position the output sequence; for (which & (ios_base::in | ios_base::out)) == (ios_base::in | ios_base::out) and way == either ios_base::beg or ios_base::end the call will position both the input and the output sequences.
But when working directly in front of the standard, one need not expect things to just present themselves. See here under the parent class streambuf:

pos_type seekoff(off_type off, ios_base::seekdir way,
                 ios_base::openmode which
                   = ios_base::in | ios_base::out) override;

Effects: Alters the stream positions within one or more of the controlled sequences in a way that is defined separately for each class derived from basic_streambuf ...

So, by looking more carefully in the standard for the quote you have provided yourself regarding seekpos of filebuf:

pos_type seekpos(pos_type sp,
                 ios_base::openmode which
                   = ios_base::in | ios_base::out) override;

Alters the file position, if possible, to correspond to the position stored in sp (as described below). Altering the file position performs as follows:

*

*if (om & ios_base::out) != 0, then update the output sequence and write any unshift sequence;

*set the file position to sp as if by a call to fsetpos;

*if (om & ios_base::in) != 0, then update the input sequence;

the following line says:

where om is the open mode passed to the last call to open(). ...

So this means that you cannot specify in the call itself which sequence you want to update. As in, the standard here says that the implementation should plainly ignore (!) the om argument.
Another bit we need not miss is in the quote you have provided regarding seekoff, where it says:

Next, seek to the new position: if width > 0, call fseek(file, width * off, whence), otherwise call fseek(file, 0, whence).

So underlying it's just a call to fseek. But on which particular FILE object? Are there separate ones for input and output? I believe the answer we're looking for appears in spec under filebuf:

§ 27.9.1.1

*

*The class basic_filebuf associates both the input sequence and the
  output sequence with a file.

*The restrictions on reading and writing a sequence controlled by an object of class
  basic_filebuf are the same as for reading and writing with the Standard C library
  FILEs.

*In particular:

*

*If the file is not open for reading the input sequence cannot be read.

*If the file is not open for writing the output sequence cannot be written.

*A joint file position is maintained for both the input sequence and the output sequence.

As in, both seekoff and seekpos behaves the same regarding which sequence is being updated by the call, input or output (or both), and it is determined only by what was passed to open().
Also, just encountered this from about 5 years ago I see: fstream seekg(), seekp(), and write()
Edit, for further clarification:
Note the spec for seekoff says:

if the last operation was output, then update the output sequence and
  write any unshift sequence.

seekpos also says:

update the output sequence and write any unshift sequence;

It is the remarks section for seekoff that defines what "Write any unshift sequence" means. And as such it should be equivalent for both methods. But then both specify further: seekoff says it calls fseek and seekpos says it calls fsetpos (identical to fseek in this regard).
The reason for this, and for even mentioning the last operation was output bit, is found when considering that point 2 from section § 27.9.1.1 brought above is explained here in the C11 standard, ISO/IEC 9899:2011:

§7.21.5.3 The fopen function
¶7 When a file is opened with update mode ('+' as the second or third character in the
  above list of mode argument values), both input and output may be performed on the
  associated stream. However, output shall not be directly followed by input without an
  intervening call to the fflush function or to a file positioning function (fseek,
  fsetpos, or rewind), and input shall not be directly followed by output without an
  intervening call to a file positioning function, unless the input operation encounters end-of-file.

So to answer your comment below, whether seekoff will update the input sequence is regardless of whether the last operation was input. If the last operation wasn't input, then there's the technicality with the unshift sequence discussed above. But part of the idea for the whole stream classes is to encapsulate i/o in a way that doesn't bother you with such maintenance chores.

redpajama_set_name: RedPajamaStackExchange


text:
Height rank
150 North Riverside
Overview About Videos Research Initiatives
© Tom Rossiter Photography
© Tom Rossiter
© Marshall Gerometta/CTBUH
© Lester Ali
© Butler V. Adams
© Goettsch Partners, Inc.
© Riverside Investment & Development
© John W. Cahill
© Robert B. Johnson,SE
© Goettsch Partners
CTBUH Drawing
To Tip:
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest point of the building, irrespective of material or function of the highest element (i.e., including antennae, flagpoles, signage and other functional-technical equipment).
Architectural:
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the architectural top of the building, including spires, but not including antennae, signage, flag poles or other functional-technical equipment. This measurement is the most widely utilized and is employed to define the Council on Tall Buildings and Urban Habitat (CTBUH) rankings of the "World's Tallest Buildings."
Occupied:
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the highest occupied floor within the building.
The number of floors above ground should include the ground floor level and be the number of main floors above ground, including any significant mezzanine floors and major mechanical plant floors. Mechanical mezzanines should not be included if they have a significantly smaller floor area than the major floors below. Similarly, mechanical penthouses or plant rooms protruding above the general roof area should not be counted. Note: CTBUH floor counts may differ from published accounts, as it is common in some regions of the world for certain floor levels not to be included (e.g., the level 4, 14, 24, etc. in Hong Kong).
Below Ground
The number of floors below ground should include all major floors located below the ground floor level.
Height 220.8 m / 724 ft
The current legal building name.
CTBUH collects data on two major types of tall structures: 'Buildings' and 'Telecommunications / Observation Towers.' A 'Building' is a structure where at least 50% of the height is occupied by usable floor area. A 'Telecommunications / Observation Tower' is a structure where less than 50% of the structure's height is occupied by usable floor area. Only 'Buildings' are eligible for the CTBUH 'Tallest Buildings' lists.
The CTBUH follows the United Nations's definition of Country, and thus uses the lists and codes established by that organization.
The CTBUH follows the United Nations's definition of City, and thus uses the lists and codes established by that organization.
150 North Riverside Plaza
A single-function tall building is defined as one where 85% or more of its usable floor area is dedicated to a single usage. Thus a building with 90% office floor area would be said to be an "office" building, irrespective of other minor functions it may also contain.
A mixed-use tall building contains two or more functions (or uses), where each of the functions occupy a significant proportion of the tower's total space. Support areas such as car parks and mechanical plant space do not constitute mixed-use functions. Functions are denoted on CTBUH "Tallest Building" lists in descending order, e.g., "hotel/office" indicates hotel function above office function.
Structural Material
All-Steel
Both the main vertical/lateral structural elements and the floor spanning systems are constructed from steel. Note that a building of steel construction with a floor system of concrete planks or concrete slab on top of steel beams is still considered an "all-steel" structure as the concrete elements are not acting as the primary structure.
All-Concrete
Both the main vertical/lateral structural elements and the floor spanning systems are constructed from concrete which has been cast in place and utilizes steel reinforcement bars and/or steel reinforced concrete which has been precast as individual components and assembled together on-site.
All-Timber
Both the main vertical/lateral structural elements and the floor spanning systems are constructed from timber. An all-timber structure may include the use of localized non-timber connections between timber elements. Note that a building of timber construction with a floor system of concrete planks or concrete slab on top of timber beams is still considered an "all-timber" structure as the concrete elements are not acting as the primary structure.
Mixed-Structure
Utilizes distinct systems (e.g. all-steel, all-concrete, all-timber), one on top of the other. For example, a Steel Over Concrete indicates an all-steel structural system located on top of an all-concrete structural system, with the opposite true of Concrete Over Steel.
A combination of materials (e.g. steel, concrete, timber) are used together in the main structural elements. Examples include buildings which utilize: steel columns with a floor system of reinforced concrete beams; a steel frame system with a concrete core; concrete-encased steel columns; concrete-filled steel tubes; etc. Where known, the CTBUH database breaks out the materials used within a composite building's primary structural elements.
To Tip
Floors Below Ground
# of Parking Spaces
Number of Parking Spaces refers to the total number of car parking spaces contained within a particular building.
# of Elevators
Number of Elevators refers to the total number of elevator cars (not shafts) contained within a particular building (including public, private and freight elevators).
Top Elevator Speed
Top Elevator Speed refers to the top speed capable of being achieved by an elevator within a particular building, measured in meters per second.
Tower GFA
Tower GFA refers to the total gross floor area within the tower footprint, not including adjoining podiums, connected buildings or other towers within the development.
136,010 m² / 1,463,999 ft²
Tallest in the World
Tallest in North America
Tallest in United States
Tallest in Chicago
Construction Start
CTBUH Member Companies Involved
All Companies Involved
Riverside Investment & Development
Usually involved in the front end design, with a "typical" condition being that of a leadership role through either Schematic Design or Design Development, and then a monitoring role through the CD and CA phases.
Goettsch Partners
The Design Engineer is usually involved in the front end design, typically taking the leadership role in the Schematic Design and Design Development, and then a monitoring role through the CD and CA phases.
Magnusson Klemencic Associates
MEP Engineer
Cosentini Associates
Other Consultant
Other Consultant refers to other organizations which provided significant consultation services for a building project (e.g. wind consultants, environmental consultants, fire and life safety consultants, etc).
These are firms that consult on the design of a building's façade. May often be referred to as "Cladding," "Envelope," "Exterior Wall," or "Curtain Wall" Consultant, however, for consistency CTBUH uses the term "Façade Consultant" exclusively.
Permasteelisa Group
GEI Consultants
Material Supplier
Material Supplier refers to organizations which supplied significant systems/materials for a building project (e.g. elevator suppliers, facade suppliers, etc).
Façade Maintenance Equipment
Manntech
The main contractor is the supervisory contractor of all construction work on a project, management of sub-contractors and vendors, etc. May be referred to as "Construction Manager," however, for consistency CTBUH uses the term "Main Contractor" exclusively.
Clark Construction Group
Shiner + Associates
Stutzki Engineering; Permasteelisa Group
Wolff Landscape Architecture
McCann Systems; One Lux Studio
Vertical Transportation
Jenkins & Huntington
CTBUH Awards & Distinctions
Best Tall Building Americas 2018 Award of Excellence
2018 CTBUH Awards
Urban Habitat - Single Site Scale 2019 Award of Excellence
CTBUH Initiatives
CTBUH 2019 Award of Excellence Winners Announced
5 December 2018 - Awards
Five Minutes With: James Goettsch & Anthony Scacco
19 November 2018 - CTBUH News
19 November 2018 | Chicago
James Goettsch is the Chairman and Co-CEO of Goettsch Partners as well as the firm's design director, responsible for developing the firm's design talent and...
Steel and the Skyscraper City: A Study on the Influence of Steel on the Design of Tall Buildings
Shelley Finnigan, ArcelorMittal; Barry Charnish, Entuitive; Robert Chmielowski, Magnusson Klemencic Associates
At the turn of the century, building design began to evolve. Improvements included indoor plumbing, the advent of escalators, and creation of the "Chicago window."...
About 150 North Riverside
The 150 North Riverside site is located prominently at the confluence of the three branches of the Chicago River and less than one block away from one of Chicago's busiest commuter train stations. With exposed railroad tracks on the west side of the site and the city requirement for a public right-of-way on the east side, the remaining area on which to build was considered impossibly narrow, and the site sat undeveloped for decades.
Utilizing a unique core-supported structure with a very small footprint at grade, the design resolves the site challenges and provides a Class A office tower with efficient, column-free floor plates. The building's unusual core-supported design results in a 221-meter tower resting atop a base that is merely 12 meters wide. The building is most noticeably significant for the narrow aspect ratio of its core; at 20:1 it is among the world's thinnest. In consideration of this, the building also contains the first-ever application of a 12-tank tuned liquid mass damper (TLMD) at the tower's top to manage both building drift and acceleration. With a total of 605,665 liters of water, the TLMD also provides city-approved fire protection storage tanks to supply the building's sprinkler system, a creative dual purpose that is a Chicago first. The 16 sloping columns at the cantilevers feature the largest rolled-steel shapes ever used in a high-rise building in the U.S. The shapes are 1,092 millimeters deep and weigh 1,377 kilograms per meter.
This narrow building footprint accomplishes several strategic goals, in addition to facilitating column-free office space. It also creates a dramatic interior space in the lobby, while allowing for more than 75 percent of the property to be unenclosed outdoor space. The tower's limited footprint and the angled sweep of its underside appear to usher the river past the site, breaking down the tower's considerable mass and presenting a balanced composition.
Tenants and visitors enter through a dramatic, 27-meter-high lobby enclosed by a glass-fin wall hung from the structure above. The lobby features the "150 Media Stream," a one-of-a-kind curated multimedia wall that showcases the work of local and other digital artists. The 46-meter-long, site-specific installation provides a lobby focal point while also addressing the transition between the opaque wall over the parking deck and the glass-fin wall above, using 89 LED blades, carefully choreographed in varying lengths and widths.
Building amenity spaces include a restaurant, bar, fitness center and conference center – all with water views. The condensed lobby and elevator cores open the majority of the 8,093-square-meter site as a landscaped public park, plaza and riverfront promenade.
Outside, the park and plaza provide more than 300 linear meters of seating, multiple assembly/event spaces and 110 meters of at-grade Riverwalk frontage, which has already become one of the most populated walkways for downtown commuters. Those who negotiate the grade change of the landscaped plaza on the west side of the tower find themselves in the unique position of being outdoors and at eye level with Chicago's famous elevated train, without being in a station.
The structural acrobatics performance has paid off commercially as well as urbanistically, taking what was once deemed an unbuildable site and creating an optimal mix of leasable floor space, public outdoor space, and semi-public indoor space, complemented by custom-designed artwork.
Monthly Video Series
Awards Symposium & Dinner Videos
CTBUH Leader Presentations & Meetings
30 May 2018 | Chicago
A Generous Public Domain at an Urban Crossroads
The 150 North Riverside site is located prominently at the confluence of the three branches of the Chicago River and less than one block away...
Finding Tailored Solutions to Common Problems
As Chairman and CEO of Magnusson Klemencic Associates, Ron Klemencic has played an active role in shaping the direction of the structural engineering community. His...
26 October 2015 | Chicago
Urban Open Space - A Tower in the Park and a Park in the Tower
In urban centers dominated by tall buildings, access to outdoor space is important. We will explain how two urban office building developments provide valuable outdoor...
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James Goettsch, Goettsch Partners
Tour Report
These projects will be represented at the CTBUH 2019 Tall + Urban Innovation Conference, where they will compete in real time for winning distinctions in each category.
James Goettsh, Goettsch Partners, and Anthony Scacco, Riverside Investment & Development, sat down with CTBUH to discuss the drivers and challenges behind 150 North Riverside.
CTBUH Study Examines Tallest Buildings with Dampers
CTBUH has released a Tall Buildings in Numbers (TBIN) interactive data study on the world's tallest buildings with dampers.
150 North Riverside Holiday Tour
As an annual tradition, CTBUH HQ staff are given a tour of tall building during their holiday celebrations. This year, the staff visited 150 North Riverside by Goettsch Partners.
Chicago Regional Tour
CTBUH 2015 delegates toured Chicago and its architectural marvels. From recently constructed skyscrapers to the modern marvel of Willis Tower, which held the tallest title for 25 years.
EMI Lead Chicago Tall-Building Study Trip
A group of 20 Belgian real estate professionals traveled to Chicago from May 25-29 to visit several tall buildings, and related developments as part of a CTBUH Belgium study trip.