MERCEDES-BENZ STADIUM – DESIGN AND …

1 MERCEDES-BENZ STADIUM DESIGN AND CONSTRUCTIONS tructural EngineersAssociation of Georgia05/10/2017 BUROHAPPOLDLOCAL KNOWLEDGE + GLOBAL EXPERTISEBuro HappoldORIGINS OF BURO HAPPOLD: FREI OTTO + TED HAPPOLDBEGINNING OF ROOFS THAT TRANSFORM The New STADIUM Project for the Atlanta Falcons will seat 75,000 fans and will feature a roof opening that will provide flexibility in hosting a wide variety of events in the STADIUM . Eight unique roof petals can open in less than eight minutes, creating a camera lens-like effect that exposes the inside of the facility to the open air on game and event days. Another first of its kind is the nearly five-stories tall 360-degree HD video halo board that will not only be the largest video board in the NFL, but in the OVERVIEW Attraction for Atlanta Unique DESIGN Roof Innovation Draw on World-Class Eventsand EntertainmentINITIAL DESIGN GOALS Owner: Georgia World Congress Center Authority Developer: Atlanta Falcons Architect: HOK (Kansas City) TVS, GVSA, SBS (Atlanta) Contractor: Holder, Hunt, Russell, Moody, a Joint Venture Structural: BuroHappold Engineering (Superstructure)Sykes Consulting, Inc (Foundations, Precast)HOK (Halo Steel) Mechanization: Uni-Systems MEP: WSP Steel Fabricator:Canam Group Steel Erector: Derr-Isbell Construction (Roof)Superior Rigging (Facade) Connection Consultants: Ferrell Engineers, MBJ Use.

2 NFL, MLS, NCAA Sports, Entertainment Events Size: Approximately square feet & 75,000 seatsPROJECT DETAILSNEW STADIUM SITE LOCATIONSIZE COMPARISONSIZE COMPARISON 100% Schematic DESIGN October 7, 2013 Ground Breaking May 19, 2014 100% DESIGN Development June 18, 2014 Construction Documents - Concrete August 15, 2014 Mill Order Roof Steel (65 ksi)July 27, 2014 Mill Order Roof Steel September 2, 2014 Mill Order Fa ade Steel October 17, 2014 Construction Documents Roof Steel December 1, 2014 Construction Documents Architecture April 8, 2015 Construction Documents MEP April 8, 2015 Opening August 2017 MILESTONESCOPYRIGHT 1976-2015 BUROHAPPOLD ENGINEERING.

3 ALL RIGHTS RESERVEDF A L C O N S S T A D I U M B R E A K D O W NFoundation COPYRIGHT 1976-2015 BUROHAPPOLD ENGINEERING. ALL RIGHTS RESERVEDF A L C O N S S T A D I U M B R E A K D O W NBowl Structure Foundation COPYRIGHT 1976-2015 BUROHAPPOLD ENGINEERING. ALL RIGHTS RESERVEDF A L C O N S S T A D I U M B R E A K D O W NBowl Seating Bowl Structure Foundation COPYRIGHT 1976-2015 BUROHAPPOLD ENGINEERING. ALL RIGHTS RESERVEDF A L C O N S S T A D I U M B R E A K D O W NBowl Seating Bowl Structure Foundation Fa ade COPYRIGHT 1976-2015 BUROHAPPOLD ENGINEERING. ALL RIGHTS RESERVEDF A L C O N S S T A D I U M B R E A K D O W NRoof Structure Bowl Seating Bowl Structure Foundation Fa ade COPYRIGHT 1976-2015 BUROHAPPOLD ENGINEERING. ALL RIGHTS RESERVEDF A L C O N S S T A D I U M S T R U C T U R ECOPYRIGHT 1976-2015 BUROHAPPOLD ENGINEERING.

4 ALL RIGHTS RESERVEDF A L C O N S S T A D I U MS K I NFoundationsPROJECT CASE STUDY For Structural Engineers Association of Georgia (SEAOG)By Martin Kigudde, PE In Collaboration with BuroHappold Engineering and HOKMay 10, 2017 mercedes benz StadiumMay 10, 2017 Structural Engineering Consulting Firm Established in 2001 Headquarters in Atlanta, GA Satellite Office in Savannah, GA Aviation, Sports, K-12, Higher Education, Commercial, Drew High SchoolMetropolitan ChurchGainesville StateFISERV Office BuildingMetropolitan LibraryLucas Oil StadiumHartsfield Jackson International AirportConsolidated Rental Car Facility (CONRAC)The New World of Coca-ColaAtlantaSavannahMercedes benz StadiumMay 10, 2017 National Work21 StatesInternational WorkAbu DhabiAnguillaMercedes benz StadiumMay 10, 2017 STADIUM is the new home of the Atlanta Falcons and Atlanta United FC.

5 Scheduled to open in the fall of 2017. Foundation DESIGN started Mid-2013. Architects: HOK, tvsdesign, SBS, and GVSA. Structural Engineer Super-structure: Buro Happold Consulting Engineers Structural Engineer Halo: HOK Structural Structural Engineer: Sykes Consulting, Inc. EOR for: Foundations, retaining walls, and slab-on-grade. CMU walls. Precast seating and framing at lower bowl. Concession lids. Sponsorship Suites. Civil Engineer: Kimley-Horn and Associates, Long Engineering, Skyline Eng. Geotechnical Engineer: Langan Engineering and Environmental Services. Weekly BIM Collaboration between team Introduction: mercedes benz StadiumMay 10, 2017 Site located south of the current Georgia Dome and bounded by: Northside Drive. Mangum Street. MLK Jr. Drive. STADIUM construction required relocation of: MLK Jr.

6 Drive and Mangum Street. Friendship Baptist Church. Mount Vernon Baptist Church. MARTA East-west line tunnel runs adjacent and to the north of the site. Vibration considerations for the tunnel. Construction load surcharge limits. 5 -0 horizontal easement to tunnel walls Field Elevation at 1018 -0 Georgia Dome Field Level at 980 (plaza )Project Site: mercedes benz StadiumMay 10, 2017 Foundation designed based on loads from Buro s SAP analysis models. 5 foundations types due to varying sub-surface conditions. Deep foundations for cast-in-place concrete bowl. Drilled Piers (66 to 78 diameter.) 18 diameter augercast-in-place piles (220-T & 150-T) Shallow foundations for precast inner bowl. Shallow foundations on existing soils Shallow foundations on Geopiers. 8" SOG Approx. 460,000 GSF (not including the playing field).

7 Playing field was designed by specialty field designer, FTE, Inc. Quantities: 1900+ augercast piles 220+ Drilled piers 11,000+ CY of concrete in footings and pilecaps Deep Foundation Testing: 1 Full scale Statnamic test. 1 O-cell test to determine capacity. 2 Full scale auger cast pile tests. Foundation DESIGN : mercedes benz StadiumMay 10, 2017 19-mega columns support the main roof trusses. 8-Mat foundations support the mega column clusters. Mat foundations were designed using SAFE 3D-Finite elements DESIGN software. Foundation reaction loads from Buro Happold s SAP Column Foundations: mercedes benz StadiumMay 10, 2017 Mat foundations 7 -0 to 12 -0 thick high-strength concrete. Mat foundations supported on drilled piers and piles. Longitudinal and shear reinforcement required in the mats. Mass concrete considerations: Crushed ice and cooling the coarse aggregate with chilled water.

8 Surface thermal insulation boards and curing blankets. Temps monitored using thermal Foundations:Mat Foundation rebarMat Foundation rebarInsulation boards at Mat Foundation Mat Foundation at South-East Quad (MCC02)(221 -18 diameter piles) mercedes benz StadiumMay 10, 2017 Foundation DESIGN :Mega Column Mat MCC05(7 -6 thick; 11-72 Piers) Mat Foundation DESIGN using SAFE software. IBC 2012 Longitudinal and shear reinf. Individual piles and drilled piers designed using Enercalc software. Drilled Pier Capacities: 2800 kips 8300 kips Spread footings designed using Enercalcsoftware. Column pilecaps designed using Window s based proprietary pilecap DESIGN software Concrete Strength: Spread Footings = 4000 psi Augercast Piles = 4000-6000 psi grout Pilecaps= 6000 psi Drilled Piers = 6000 psi Mat Foundations = 7000-8500 psiMega Column Mat MCC08(7 -6 thick; 16-72 Piers) mercedes benz StadiumMay 10, 2017 Aggressive schedule; fast-track project.

9 Foundation installation began while super-structure DESIGN still progressing. Drill and epoxy for CMU wall dowels. Drilled pier rock sockets (5 -0 to 18 -0 ). Failed O-cell drilled pier load test required redesign. Existing unforeseen deep foundations from previously demolished structures. Handling long pile/pier rebar cages. Rebar congestion in mat foundation. Damaged foundation Challenges:Handling long rebar cagesRebar congestionDamaged pile dowelsMercedes benz StadiumMay 10, 2017 Auger-cast pile contractor: Berkel & Company Contractors, Inc. Drilled pier contractor: ABE Geotechnical Contractors. Geopier contractor: Hayward Baker. Shallow foundation contractor: Precision Concrete. Concrete Supplier: Argos Foundation construction started in June Construction:Installation of 1stpile on projectAuger-cast pile rebar cagesDrilled pier rebar cagesMercedes benz StadiumMay 10, 2017 Foundation Construction:Geopiers at shallow foundationsTops of auger-cast pilesPilecap rebar and column dowelsMercedes benz StadiumMay 10, 2017 Hydrotherapy pools Drink rails.

10 Goal post foundations. Broadcasting booths. Elevator pits. Escalator pits. Features at Field Level:Escalator pit wallsElevator pit wallsMercedes benz StadiumMay 10, 2017 Inner bowl is all precast structure: Columns Vomitory walls Raker beams Seats Precast seating on cast-in-place rakers at concourse levels outside inner bowl. Standard double and triple units Metromont is the precast contractor. Total NFL seating capacity is 70, Seats: mercedes benz StadiumMay 10, 2017 Precast Seating: mercedes benz StadiumMay 10, 2017 Concession Lids: At Concourse levels. Roofs over the concessions and bathrooms. Steel beams, joists, and metal deck. Supported by CMU walls and cast-in-place rakers. Fit out of Corporate sponsorship suites. Suites at Concourse levels. Structural steel and cold-formed framing. Misc.