100 High-Rise Towers

AMSYSCO Inc. recently reached an important milestone.  We have 100 high-rise towers (20-stories or more) listed in the ‘Skyscraper Database‘ by the Council on Tall Buildings and Urban Habitat.  All of the towers have post-tensioned concrete in the elevated slabs.

To date, 78 high-rises towers are either completed or topped-out.  Another 22 high-rise towers are under construction.  Most of the high-rise towers are located in the Midwest US.

Our largest market is in downtown Chicago – the birthplace of the skyscraper.

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Copyright © 2017 by AMSYSCO, Inc. All rights reserved.

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Rattan Khosa selected as a finalist of the EY Entrepreneur of the Year 2017 Award in the Midwest

EY announces Rattan Khosa of AMSYSCO
Entrepreneur Of The Year® 2017 Award finalist in the Midwest

Romeoville, IL – EY today announced that Rattan Khosa, President of AMSYSCO is a finalist for the Entrepreneur Of The Year® 2017 Award in the Midwest. The awards program, which is celebrating its 31st year, recognizes entrepreneurs who are excelling in areas such as innovation, financial performance and personal commitment to their businesses and communities. Mr. Khosa was selected as a finalist by a panel of independent judges. Award winners will be announced at a special gala event on June 21 in Chicago.  (Press Release)

“No entrepreneur can succeed without a great team let alone reach next rung on the ladder of this coveted competition” according to Rattan Khosa.

Now in its 31st year, the program has expanded to recognize business leaders in over 145 cities and more than 60 countries throughout the world.

Regional award winners are eligible for consideration for the Entrepreneur Of The Year National competition. Award winners in several national categories, as well as the Entrepreneur Of The Year National Overall Award winner, will be announced at the Entrepreneur Of The Year National Awards gala in Palm Springs, California, on November 18, 2017. The awards are the culminating event of the Strategic Growth ForumTM, the nation’s most prestigious gathering of high-growth, market-leading companies.


Sponsors:
Founded and produced by EY, the Entrepreneur Of The Year Awards are nationally sponsored in the US by SAP America, Merrill Corporation and the Ewing Marion Kauffman Foundation.  Local sponsors for the Midwest program include Plexus Groupe, LaSalle Network, PNC Bank, Becker Professional Education, Cresa, DLA Piper, Milwaukee Business Journal and 1871.

AMSYSCO has been a leading post-tensioning supplier based in Romeoville, IL since 1981.  AMSYSCO’s state-of-the-art manufacturing facilities are unrivaled. The entire procurement, manufacturing and testing processes of AMSYSCO’s distinctive GREEN PT System is produced under the Post-Tensioning Institute’s rigorous plant certification program for Unbonded Tendons.

About Entrepreneur Of The Year®
Entrepreneur Of The Year®, founded by EY, is the world’s most prestigious business awards program for entrepreneurs, chosen from an independent panel of judges including entrepreneurs and prominent leaders from business, finance, and the local community. The program makes a difference through the way it encourages entrepreneurial activity among those with potential and recognizes the contribution of people who inspire others with their vision, leadership and achievement. As the first and only truly global awards program of its kind, Entrepreneur Of The Year celebrates those who are building and leading successful, growing and dynamic businesses, recognizing them through regional, national and global awards programs in over 145 cities and more than 60 countries. ey.com/eoy

About EY
EY is a global leader in assurance, tax, transaction and advisory services. The insights and quality services we deliver help build trust and confidence in the capital markets and in economies the world over. We develop outstanding leaders who team to deliver on our promises to all of our stakeholders. In so doing, we play a critical role in building a better working world for our people, for our clients and for our communities.

EY refers to the global organization, and may refer to one or more of the member firms of Ernst & Young Global Limited, each of which is a separate legal entity. Ernst & Young Global Limited, a UK company limited by guarantee, does not provide services to clients. For more information about our organization, please visit ey.com.

This news release has been issued by Ernst & Young LLP, a member of the global EY organization that provides services to clients in the US.

For more information, please visit ey.com.

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Copyright © 2017 by AMSYSCO, Inc. All rights reserved.

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OneEleven – Post Tensioned Transfer Deck

 

The high-rise building located at 111 W. Wacker Drive in downtown Chicago was formerly known as the ‘Waterview.’  The structure was originally designed as an 89-story luxury hotel located along the Chicago River.  The construction of the conventionally-reinforced building progressed until the 27th floor when the 2007 economic recession hit the U.S.  Ultimately, the original project was shelved due to financing issues.  The unfinished building became a visible eye-sore in the heart of Chicago for several years.  Fortunately, a consortium of creditors and lienholders (Clark Wacker LLC) took ownership of the project and formed a Joint Venture with Related Midwest in 2010.

In 2012, the hotel was redesigned as a 60-story residential apartment building and renamed ‘OneEleven.’  There were several major design issues with converting a hotel into a 500-unit apartment with a smaller floor-plate and different column layout.  Since the column were poured until the 28th floor, this floor was built as originally designed.  The 29th floor was constructed with a 12-inch post-tensioned slab and functioned as an amenity level.

What separates this high-rise tower from others is the 60-inch transfer deck (located on the 30th floor).  The transfer deck was designed to be a 72-inch conventionally-reinforced slab with the post-tensioned floors above.  The PT Supplier and Concrete Contractor redesigned it into a 60-inch thick slab using post-tensioned to replace roughly 372 tons of rebar.  The redesign saved around $380,000 from the cost of the transfer deck (excluding costs of other vertical elements).  The reduced dead load of the slab also helped eliminate the reshoring requirements.  The 12-inch building height reduction funneled into lower costs for all vertical elements and lower operational energy costs.  A flat-plate was used in lieu of large beams and transfer girders in order to reduce forming costs.

The installation of the transfer slab and coordination of trades was extremely complex.  Additionally, the coordination was fast-paced since the transfer slab was the second floor of the new construction.  Construction trades and engineer spent almost one month on coordinating PT tendons, rebar and MEP piping/penetrations.

The transfer mat was poured in two lifts (20-inch and 40-inch lifts) for a total of roughly 2,250 cubic yards of 6000 psi concrete.  One of the pours lasted 17 hours – and had an increased degree of complexity due to being poured mid-air.  In total, there was 60 tons of unbonded-post-tensioning (gross weight) used in the transfer deck.

The use of unbonded post-tensioning in the original design was also used to reduce the high-rise building height by at least 1” per floor as compared to mildly-reinforced concrete.  PT helped make a stalled project more economical due to the reduction in material costs (concrete columns/walls, MEP piping, elevators/stairs and curtain-wall).

Furthermore, vertical unbonded post-tensioning tendons were used in the shear walls from level 29 to level 40.  The vertical tendons were stressed in two sections.  Due to the lack of decking, the two sections of tendons were purposely spliced.  Extra “standby” tendons were added for insurance in case the elongations of the other tendons fell short.  According to the concrete contractor, “Utilizing vertical post-tensioning through the core walls proved to be a cost effective solution to meeting the structural engineer’s lateral stability requirements. While certainly a unique application in a vertical structural element, the system was straightforward to install and helped the concrete contractor meet the design and budget constraints.”

This project helped the developer win the NAIOP Developer of the Year and was featured on the cover of ‘ENR Midwest’ magazine.  The developer eventually sold the property for $333 million (or $661,000 per unit) in late-2014.  In total, over 170 tons of 0.5” unbonded post-tensioning tendons were installed within the 29th to 60th floors.  Although not required by the Building Code or ACI Code, an encapsulated PT system was utilized in order to comply with the PTI revision to the Unbonded PT Specification (Addendum #3 PTI M10.2-00).

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Copyright © 2015 by AMSYSCO, Inc. All rights reserved.

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