CHICAGO COMMITTEE The 458th meeting of the Committee on High Rise Buildings was held ON HIGH RISE BUILDINGS Thursday, November 8, 2007, at the Mid-Day Club in the Chase Tower, 21 South Executive Board: th STEVEN RIGGIO - Chairman Clark Street, 56 Floor, Chicago, IL KIM CLAWSON - Vice Chairman NESTOR IWANKIW -Secretary MARK SIMONIDES - Treasurer DAVID E. ECKMANN - Program Director 1. MEMBERS PRESENT: (45) Afshari, Fred; ; Baldassarra, Carl; Boelter, Fredric W.; Boyd, RAYMOND S. CLARK - Past Chairman Jon M.; Burns, John; Burns, Joseph; Clawson, Kim; Corley, W. Gene; Dragunsky, Boris; Members: Eckmann, David E.; Fencl, Richard; Gandras, Bernie; Grupe, Robert; Hagen, Mike; Halvorson, FRED AFSHARI CHARLES ANDERSON Robert; Horvath, Jesse; Iwankiw, Nestor; Jalayerian, Mehdi; Johnson, Gerald L.; Johnson, CLYDE N. BAKER Robert B.; Lake, Bruce; Lane, Jeffrey; Lindroth, Alan; Leung, Luke; Marker, Scott; McNamara, CARL BALDASSARRA FREDRIC W. BOELTER Thomas; Miller, Wayne; Moritz, Fredric; Nair, R. Shankar; Riggio, Steven; Saigh, John; JON M. BOYD JOHN BURNS Schipporeit, George; Shiner, Allen; Shuldes, Robert; Sido, Kevin R.; Simonides, Mark; Sohl, JOSEPH BURNS Duane; Tazelaar, Rob; Tylk, Michael; Urbikas, John J.; Walton, William H.; Weismantle, Peter; CHARLES J. CARTER IAN R. CHIN Weldon, Lawrence; Wysockey, Michael; Wysockey, Thomas JAMES A. CLEARY PAUL COLGAN GENE CORLEY 2. MEMBERS EMERITUS PRESENT: (3) Asrow, Sherwin P.; Lindegard, Robert; Olin, BORIS DRAGUNSKY RICHARD E. FENCL Harold BERNIE GANDRAS ROBERT C. GRUPE MIKE HAGEN 3. EX-OFFICIO MEMBERS PRESENT: (0) ROBERT A. HALVORSON JEFFREY HARPER JESSE D. HORVATH MICHAEL HUGHES 4. ALTERNATES PRESENT: (5) Aaron Vanney (Alt for Jeffrey Harper); Cameron Hufford (Alt MEHDI JALAYERIAN for Ron Klemencic); Matthew Berglund (Alt for Steven Nilles); David Fanella (Alt for Jay Paul); DANIEL JENKINS GERALD L. JOHNSON Robert Fahlstrom (Alt for Richard Rodriguez) ROBERT B. JOHNSON RONALD KLEMENCIC GARY KOHN 5. GUESTS OF MEMBERS: (14) James Kemper and John Shahlapour, Lucien Lagrange STEVEN KOSMATKA BRUCE LAKE Architects, guests of Robert Halvorson; Jim Swanson and Tim Laken, Halvorson and Partners, JEFFERY LANE LUKE LEUNG guests of Robert Halvorson, Nicholas Isyumov, Univ. of Western Ontario and Lucien Lagrange, ALAN LINDROTH Lucien Lagrange Architects speakers; Matt Streid, MKA, guest of David Eckmann; David WILLIAM LYONS – SCOTT MARKER Nickell, guest of Michael Tylk; Mike Revello, Peoples Energy, guest of Jon Saigh; Abbas Yava RICHARD MASTER ANTHONY MCGUIRE and Barbara Buylan, TT, guests of Joseph Burns; Dana Thorne & John Lamb, guests of THOMAS J. MCNAMARA Steven Riggio; Paul Sincaglia, Hughes Associates, Inc., guest of Nestor Iwankiw WAYNE MILLER JAMIE MORENO FREDRIC A. MORITZ DANIEL MURPHY 6. SPEAKERS: (3) Lucien Lagrange, Lucien Lagrange Architects, Nicholas Isyumov, R. SHANKAR NAIR University of Western Ontario, and Robert A. Halvorson, Halvorson and Partners STEVEN NILLES JAY PAUL THOMAS POWERS JERRY REICH 7. MEETING CALLED TO ORDER: Chair Steven Riggio called the meeting to order at JAMES REICHART approximately 6:00 P.M. Self-introductions of alternates and guests followed. PHILIP RENOUF JOHN R. SAIGH GEORGE SCHIPPOREIT ALLEN H. SHINER 8. SECRETARY’S REPORT: Secretary Nestor Iwankiw reminded all to clearly sign the ROBERT W. SHULDES attendance sheets to minimize recording errors and corrections. He noted that several paper KEVIN R. SIDO DUANE SOHL copies of the October Draft Minutes were available on the tables for review, in addition to the CHRIS P. STEFANOS ROB TAZELAAR recent email distribution. Besides a few attendance corrections noted earlier, there were no J. MICHAEL TRACY other comments or suggested modifications. Upon motion and second, these October, 2007 MICHAEL TYLK JOHN J. URBIKAS Minutes were officially approved by a unanimous voice vote. WILLIAM WALTON PETER WEISMANTLE LAWRENCE C. WELDON 9. TREASURER S REPORT: Hard copies of the Treasurer t were distributed to all EDWARD P. WILKAS ’ ’s Repor JEFFREY WINICK attendees by Treasurer Mark Simonides. The current balance stands at about $57,000, with MICHAEL WYSOCKEY THOMAS J. WYSOCKEY several Member dues and fee receivables still outstanding, as well as last month’s meeting JOHN ZILS expenses. The Report was approved by all members present.

Member Emeritus: SHERWIN P. ASROW EDWARD CARMODY TASK FORCE REPORTS: Vice-Chair Kim Clawson reported that the Buiding Pressurization JOHN E. FIALKOWSKI THOMAS KROESCHELL Task Force is focusing on measurements in existing buildings and fire incident response ROBERT LINDEGARD HAROLD OLIN procedures (in cooperation with the Chicago Fire Department). Robert Grupe informed the ARTHUR G. SALZMAN DAVID A. STUHLMACHER attendees that the Building Movements Task Force is preparing a Short Program to include

Ex-Officio: presentations by RWDI and the University of Notre Dame. Jon Boyd observed that the Univ. of CHRIS BUSCHELL DEMARRE MCGILL Illinois multi-disciplinary lectures in are proceeding well, and that the Chicago RICHARD L. RODRIGUEZ Fa nce revisions were successfully completed. Some compromises were çade Ordina Contact Information: necessary on the latter (extend minimum inspection periods) in response to building owner Steven Riggio 2410 Millennium Drive cost concerns, but in general, the substantive public safety provisions of the Ordinance Elgin, IL 60123 www.cchrb.org remained intact. Robert Fahlstrom added the acknowledgement from the Chicago Department of Buildings for the Committee Fa Ordinance ’s invaluable assistance with these çade developments, which preserved its continuation in the face of some strong opposition pushing

for its total removal. Chair Riggio reported that the IIT wall mock-up will soon be ready for erection and testing. A presentation on this is being prepared for the Committee at a future meeting.

11. PROGRAM DIRECTOR’S REPORT: Program Director David Eckmann reminded all that the Holiday Party is next on the agenda for Dec. 13th at the Mid-Day Club. The 1st program topic for 2008 in January will be on the Block 37 Project by Joe Burns, TT. Other potential meeting subjects for next year include the Chicago Spire, a tour of the Aqua Bldg, MEP Issues and Advancements, all of which are still being finalized.

12. MEMBERSHIP: Chair Steven Riggio deferred any discussions or formal action on non-dues paying Members until after the Holidays.

13. OLD BUSINESS : Due to the unexpected end-of-year closing of the Mid-Day Club, Chair Riggio stated that the search committee has recommended the Tower Club as the site for the January, 2008 meeting. Based on Membership response to this new venue this meeting, a longer-term agreement may be sought.

14. NEW BUSINESS : A Seminar to roll-out the recently revised Chicago Façade Ordinance provisions will be prepared for the first half of 2008, with Jon Boyd agreeing to serve as the Committee’s lead. Safety issues with scaffolding will also be included in the presentations. This event, of probably ½-day duration, will be planned in cooperation with the city and other interested organizations (BOMA, SEAOI, etc.)

Chair Riggio again invited all to attend the upcoming CCHRB Holiday Party at the Mid-Day Club on Dec. 13th. At the request of the Chair, Jeff Lane has already obtained a quote from the Signature Room in the John Hancock Bldg. for next year’s Holiday Party in Dec., 2008. The contract will be soon be signed to lock in the event.

15. PROGRAM : “The Elysian Hotel Supplemental Damping System" by Lucien Lagrange, Lucien Lagrange Architects, Nicholas Isyumov, University of Western Ontario, and Robert A. Halvorson, Halvorson and Partners

The Elysian Hotel is a 60-story, 670 feet tall mixed-use tower currently under construction at the corner of Rush and Walton Street in the heart of Chicago’s Gold Coast. The tower contains both hotel and residences along with associated hotel function space. With a restricted floor plate area, addition of more floors and height made the building more susceptible to wind movements. Wind tunnel consulting and testing early in the design process indicated that this tall, slender building could be subject to wind-induced accelerations that were greater than desirable limits for occupant comfort, based on 10-year peak acceleration thresholds.

The final solution to this issue involves the use of Tuned Liquid Dampers, or TLD’s, to provide supplemental damping sufficient to reduce the accelerations from wind to generally accepted values. Two water-filled tanks, stacked 2 high, and approximately half-full, were designed for placement at top of building within a heated room. The tanks contain baffles to provide further damping for the sloshing water, which acts as an effective wind energy dissipator in both building directions. The presentation outlined the architectural and structural concepts of the building, the investigations and design studies performed to understand and determine the best means to mitigate wind effects, and the final design solution.

15. ADJOURNMENT: Upon conclusion of the program, Chair Riggio adjourned the meeting at approximately 8:10 PM.

NEXT MEETING: Holiday Party on Thursday evening, December 13, 2007 at the Mid-Day Club in the Chase Tower, 21 South Clark Street, 56th Floor.

Respectfully Submitted,

Nestor Iwankiw, SE, PE Secretary