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Upcoming Convention

PTI 2019 Convention & Expo

May 5-8, 2019 – Hyatt Regency Seattle
808 Howell St., Seattle, WA, 98101, USA


Register Now!  Reserve Your Hotel Room  Special Events  Committee Meeting Schedule  Exhibit/Sponsor  Technical Sessions

 

What is the PTI Convention?

The PTI Convention is the only convention dedicated solely to the post-tensioning industry. Nearly 300 of PTI’s members, customers, and guests come together annually to learn about the most cutting edge post-tensioning technologies, help advance the industry through standard and specification writing, and enjoy comradery at the various networking events.

 

Who attends the PTI Convention?

The PTI Convention is attended by key industry decision-makers and personnel. Attendee fields of practice include construction, design, materials, repair, research, inspection, testing, and more. Typical attendee professionals include executives, contractors, engineers, design professionals, inspectors, and post-tensioning industry consultants.

 

Why should I attend the PTI Convention?

PTI strives to provide its members and customers and the concrete industry with the latest in post-tensioning technology and application. The Convention encompasses 4 days of technical sessions, committee meetings, networking events, and an industry trade exhibition.

 

Registration & Pricing Information

Registration Fees
Advance Price through 4/12/2019
After 4/12/2019
PTI Member, full convention
$599
$649
PTI Member, one day
$349
$399
Non-Member, full convention
$699
$749
Non-Member, one day
$449
$499
Committee meetings only
$149
$199
Student, full convention
$50
$75

 

Special Events Information

Sunday, May 5, 6:00-8:00 p.m.

Included in full convention registration
One-day, committee meetings only, and guest/spouse: $80

Join convention attendees in the Exhibit Hall for light appetizers and drinks to kick off the convention!

Monday, May 6, 9:00 a.m.-12:00 p.m.

Not included in convention registration
$35 per attendee

Join us on the first PT Site Visit (for students & young professionals) during the 2019 PTI Convention. Take a guided tour of one of the newest features of the Seattle skyline and get an up-close look at PT construction practices. There will be a brief presentation about the advantages of PT construction, an overview of the building under construction, and a summary of PTI’s design, field installation resources, and certification opportunities before travelling to the site for a tour.

More Information

Monday, May 6, 6:00-8:30 p.m.

Included in full convention registration
One-day, committee meetings only, and guest/spouse: $125

Sit down with your industry colleagues for a plated dinner while the prestigious awards are given out. Awards include PTI Fellows, TAB Awards, and the coveted PTI Project Awards. Don’t forget to start the night off with a pre-dinner reception in the Exhibit Hall!

Tuesday, May 7, 12:00-1:30 p.m.

Not included in convention registration
$20 per attendee

The women of PTI are some of the most valuable assets the industry has to offer. Celebrate women in the PT industry at this special lunch, which is new in 2019. A prominent female speaker will also present to the group; more information coming soon!

Tuesday, May 7, 6:30-8:30 p.m.

Not included in convention registration
$125 per attendee

SPIN Seattle
1511 6th Ave., Seattle

The annual Fundraising Mixer has grown exponentially since its inaugural year in 2017. Have some fun and join convention attendees off-site for this ever-popular event. Heavy appetizers, and open bar, and games will help give you a much-deserved night away from the meeting-filled days of convention. All proceeds will be used specifically for PT-related research.

 

Technical Sessions

The PTI Convention each spring contains a series of technical sessions including research updates, state-of-the-art use of post-tensioning, and fascinating case studies.

For 2019, the following speakers/topics have been confirmed. Please note this list is preliminary and will be updated regularly (last updated 3/21/19).

 

PTI President's Welcome
Todd Stevens, PTI President, Commercial Metals Company

PTI President, Todd Stevens, will kick off the 2019 PTI Convention by welcoming all in attendance and sharing some of his vision for the institute moving forward. He will also review some new and exciting changes for PTI as well as introducing PTI’s new Executive Director, Tony Johnson.

PTI Executive Director's Vision for Your Institute
Tony Johnson, PTI

PTI’s new Executive Director, Tony Johnson will recap his vision and directions for PTI. Now 4 months into his tenure at PTI, Tony has spent considerable time listening to the needs, wants and complaints of the membership as had begun to develop a vision of the moving the Institute forward. Tony will also discuss the efforts kick off a new strategic plan for PTI including the deliverable deadline prior to the October Committee Days.

Pensacola Bay Bridge: Stay Cables Design, Testing, & Installation
Tommaso Ciccone, Tensa

The new Pensacola Bay Bridge is now being build with two arch bridges for the pedestrian part provided with vertical hangers designed and tested as per PTI DC45.1-12. This is the first application of galvanized waxed hdpe coated strand for stay cables in the US. The presentation covers the design, testing and installation aspects of these new stay cables for this project.

Post-Tensioning Innovation: Strengthening the I-90 Floating Bridge
Jacob Myer, Schwager Davis, Inc.

The State of Washington will soon claim an engineering first: a commuter train installed over a floating bridge (atop the I-90 spanning Lake Washington). However, to accommodate the train's increased load, the East Link Light Rail Extension project included a massive post-tensioning strengthening of the floating bridge. Core-drilling holes through the existing pontoons provided a route to install anchorage frames for (20) 3600ft long PT tendons, some of the longest bridge PT installations ever attempted.

Current State-of-the-Art Stay Cables Technologies Overview
Roger Frenn, Dywidag-Systems International

There are increased requirements/expectations regarding the performance of stay cables in signature structures. Referencing the New Champlain bridge in Montreal as a showcase project, this presentation explores some of the latest technologies introduced in relation to topics such as safety, aesthetics and force monitoring of the stay cables.

 

PT Can Take the Shake: LA Rams Stadium PT
Meghan Stotts, Kiewit Infrastructure West Co.

The new LA Rams Stadium in Inglewood, CA is located adjacent to the Newport-Inglewood Fault and within the glade path of the LAX airport, therefore, lowering the stadium field level approximately 100-ft below ground due to airport height restrictions. The canopy style roof is held up by a combination of cast in place and precast concrete columns, encompassing over 7.6 million linear feet of post tensioning strand.

In-Line Density Monitoring during Grouting
Andrea Schokker, University of Minnesota Duluth

Cementitious grout has proven to be an effective corrosion protection method in post-tensioning systems. While successful grouting has been used in numerous post-tensioned (PT) bridges, quality control of the material and placement in the field remains a challenge. During the grouting process on site, ensuring that the grout being placed in the tendon is representative of the intended grout design is critical for the performance of the system. Inconsistencies in the placed grout can be attributed to varying mixing procedures used in the field (such as the addition of water above the design value). In some cases, grout passing the laboratory tests may differ significantly from grout placed in the field. To alleviate these discrepancies, it is critical that the PT industry improves quality control during tendon grouting to ensure materials and products meet project requirements throughout production and placement; not just during the grout’s initial qualification. Advancements in the quality of in-place grouts can be made by refining specifications and developing a procedure to continuously measure the density of the grout as it is pumped into the tendon. This presentation focuses on the results of testing of an in-line flow meter for nearly continuous monitoring and recording of grout density and temperature.

TBD
TBD

TBD

Santa Fe Soil Anchor Retention, Mexico City
Jose Luis Quintana, Mexpresa

A group of mid-rise apartment buildings was developed over a “cliff” of cohesive soil and had behaved well for years, until water appeared in a section, thus forcing geotechnical studies which, in turn, recommended Stressed Anchors.
When the work was going on, a 7.1 Richter Earthquake started small slides in another section of the cliff, and new studies and monitoring defined two new families of stressed anchors.
The installation work was very delicate, as a consequence, requiring non-conventional actions, which are described in this Presentation, along with the design details of every type of anchor, and the care prescriptions given to the residents.
So far, no movements or slides have shown up, which indicate the solutions adopted were appropriate. But new building construction is announced for the base of the cliff, for what new groups of anchors will be required.

 

Evaluation & Remediation of Existing Slab-on-Ground Foundations
Brian Eubanks, Paragon Structural Engineering, Ltd.

Provide an overview of guidelines for evaluation, explain performance standards as well as common mis-applied standards, provide performance evaluation examples, discuss real-world case study performance evaluation examples, discuss various structural and non-structural remediation techniques as well as provide real-world remediation case study examples.

Demolition of Historic PT Systems
Aaron Sterns, Pivot Engineers

Lessons learned from demolition projects involving unanticipated and historic PT systems

Inside the Structure of the Hyatt Regency Seattle
Brett Gourley, Magnusson Klemencic Associates

The Hyatt Regency Seattle is a 45-story, 1.47 million square foot convention hotel completed in December 2018. The project consists of a 520-foot hotel tower with 1,260 rooms (the largest in the Pacific Northwest); a nine-level podium containing meeting rooms, prefunction space, and ballrooms; and seven levels of underground parking for 450 cars. Presented with a host of different building functions and spaces, the engineers employed a full toolkit of structural elements including post-tensioned and conventional concrete, steel framing, multi-story long-span trusses, concrete shear walls, buckling-restrained braces, several unique transfer elements, and an above grade seismic joint separating the concrete hotel tower from the steel convention podium. The project’s structural engineer, Brett Gourley of Magnusson Klemencic Associates, will present a look inside the Hyatt’s structure and discuss some of the many challenges, design decisions, and innovations that went into engineering and constructing Seattle’s newest hotel and convention space.

TBD
TBD

More information coming shortly

 

Pacific Coast Concrete Towers: Solving Design Challenges with Post-Tensioning
Cary Kopczynski, Cary Kopczynski & Company

Tall concrete towers on the Pacific Coast present unique design challenges. The major metropolitan areas are highly seismic, requiring that the structural engineer control building dead load and create a robust lateral force resisting system, and simultaneously provide the long spans and open space that contemporary buildings demand. This presentation will discuss and illustrate these topics with recent award-winning towers in Seattle, San Francisco, and Los Angeles. The use of post-tensioning to solve common design challenges will be spotlighted. The presentation will also include recommendations on detailing concrete buildings for buildability and construction efficiency.

High-Rise with Height Restrictions: Feeling the Squeeze
Steve Baldridge, BASE Structural Engineers

This presentation highlights unique aspects of several high-rise projects in Honolulu where the project goals could not have been achieved without post-tensioning. Unique aspects of designing buildings in Honolulu include strict height restrictions, high cost of construction and limited resources. In order to get projects to “pencil out” developers typically have to squeeze as many floors within the projects local land use mandated height restrictions. Compared to other systems post-tensioned concrete slab framing allows for thinner floor systems providing the potential to add floors to a project. The thinner slabs also help squeeze cost out of the construction budget. The squeeze is not all beneficial though and requires coordination. The appropriate use of post-tensioning helps maintain deflection and serviceability requirements. And not unique to post-tensioning the trend toward more and larger conduit and plumbing being embedded in slab systems creates additional challenges.

Pacific Coast PT Construction: Creating Success through Designer, Fabricator, & Installer Teamwork
Bryan Collons & Shane Williams, The Conco Companies

Creating a collaborative team to address all elements and stages of a PT Project is the most effective way to achieve success. This presentation will highlight the importance of cooperation and teamwork between engineering design, material fabrication, and PT installation, and provide examples of how collaboration can be fostered for project success. We will also examine the PT manufacturing and fabrication process (including sheathing extrusion, anchor installation and cable identification for field use), systems that are relevant to every member of the team.

Experiences & Observations from PT Stressing Pocket Investigations & Repairs
Pete Barlow, Contech Services, Inc.

The presentation will provide observations and experiences in the removal, preparation and re-grouting of post-tensioning stressing pockets. The experiences come from providing engineering support services to forensic engineers in various states along the Pacific Coast. These examples focus on one of the key elements of post-tensioned concrete construction and proper steps that should be taken to promote long term durability of these structures. Most of the experience and examples shown will come from structures less than 15 years old. Observations regarding the variety of conditions of grout found, the condition of grease cap protective systems, length of tendon ends found and wedge/anchorage conditions will be discussed. Photos of each condition will be shown along with the corrective actions taken once the stressing pockets were re-grouted.

Panel Discussion
Cary Kopczynski, Cary Kopczynski & Company
Steve Baldridge, BASE Structural Engineers
Bryan Collons, The Conco Companies
Shane Williams, The Conco Companies
Pete Barlow, Contech Services
These five speakers will join forces in a round-table panel discussion to collaborate with responses to frequently asked questions and new questions posed by the session attendees.

 

Diaphragm Design Using Unbonded PT
Bryan Allred, Seneca Structural Engineering, Inc.

In our review of post-tensioned building design and in speaking with other engineers, there are differing approaches to the design of diaphragms to distribute lateral forces. Many firms have used a more traditional steel/wood building methodology. The presentation will offer a design approach that models the diaphragm as a concrete element while utilizing the pre-compression from unbonded strands to reduce the amount chord and drag reinforcing.

Behavior of Unbonded PT Continuous Beams with Internal Tendons
Thomas Kang, Seoul National University

Experiments on flexural behavior of 2-span unbonded post-tensioned beams were conducted under 4-point static loading condition. A detailed investigation on internal moment and secondary moment at critical sections was carried out and reported in the last PTI Journal (Kim and Kang, 2008), which will be presented in this Convention for further discussion given the impact of the topic in the PT industry. Observations conducted, as part of this experimental research, surprisingly revealed that the experimentally obtained secondary moment in the specimens was significantly larger than that predicted using indeterminate frame analysis and the load-balancing method, particularly at the ultimate limit state. Details, pertaining to the procedure in which secondary moment from the measured data was obtained, and its review will be provided in this presentation. The most concern is on the secondary reaction (pulling) forces that were very largely measured at interior support than the estimates based on the common knowledge.

49 Story ACRO Seoul Forest: Application of PT Slabs & PT Outrigger Walls for Lateral Load Resistance
Jang Keun Yoon & Jeong Mo Koo, Daelim Industrial Co., Ltd.

This presentation will introduce an iconic 49-story tall residential building named "ACRO Seoul Forest" currently under construction by DAELIM in Seoul, South Korea. The post-tensioned flat slab systems for typical floors are used to satisfy the need of long span architectural plan, and post-tensioned outrigger wall systems are used to satisfy the lateral load demands from seismic and wind forces. To evaluate the seismic performance of the 49-story building, a series of nonlinear time history analyses are carried out for the Maximum Considered Earthquake (MCE). From the nonlinear analyses results, it is found that the overall seismic performance of the 49-story building satisfies the Life Safety (LS) under the MCE level earthquakes.

PT Diaphragms: Evaluating Principal Methods of Analysis
Fabio Albino de Souza, EBPX/Unicamp

Basically diaphragms typically are horizontal or nearly horizontal planar elements that serve to transfer lateral forces to vertical elements of the lateral-force-resisting system. Concrete diaphragms can be conventionally reinforced or prestressed, and can be cast-in-place concrete, precast concrete, or interconneced precast concrete without topping, and others. Diaphragm in-plane stiffness affects not only the distribution of forces within the diaphragm but also the distribuition of displacements and forces among the vertical elements, then reasonable classify them as rigid and flexible. Regarding the principal methods of analysis of the diaphragm can be envelope analysis (Beam Method) and Finite Element but Strut-and-tie, Equivalent lateral load, Modal Response Spectrum can also be used. This article presents a case study of a post-tensioned slab with a lateral load where the beam method (Ftool Software) and finite element analysis (ADAPT Floor Pro) were performed, the magnitude of differences between them. Verified the necessary reinforcement in the tension chord and the importance of the pre-compression in post-tensioned slab as well the shear and the reinforcement in the collectors.

 

Upside Down Glass Building: Reston Station OB1, Virginia
Jennifer Greenawalt, Thornton Tomasetti
Srini Neelamegam, CCL, USA
Reston Station OB1 is a new mixed-use building located in Reston, Virginia. Visible to thousands of people who travel to Dulles International Airport each day, this striking project consists of a 16-story office tower showcasing a unique lateral system with a diagonalized, exposed concrete exoskeleton. The tower’s floors are constructed of two-way, post-tensioned, 10-inch-thick concrete slabs with 6-inch drop panels; the PT tendons were crossed within the slab to coordinate with the exoskeleton column locations along the building edges and some PT tendons were used as tie reinforcement to resist the thrust of the diagonalized column structure. The exoskeleton columns slope at 11 degrees from vertical matching the building’s north and south edges. A five-story, open-air plaza on the north side of the building is supported by “tree columns,” which start at the base and splay out like a tree to support the overhang above the plaza. Thornton Tomasetti provided structural engineering for the project along with CCL who provided engineering for the post-tensioning, working in collaboration with owner Comstock Partners, architect JAHN, contractor DAVIS and concrete subcontractor Miller & Long.

PT Elongations Best Practices: PT Supplier
Marc Khoury, CCL, USA

PT suppliers are continuously being called on to review and approve out of tolerance elongations. This often puts suppliers in a tough position since they must resolve the issue fast but do not have all the information and resources to complete this in a timely matter. There is often a complete misinterpretation of what a PT supplier can and cannot do to help his client.
In this presentation we will discuss the PT supplier’s responsibilities towards his client, the LDP and the construction team. We will detail the process from the shop drawings phase all through the elongation approval letter and provide best practices to minimize delays. These delays can cause frustration and often lead to cost implications and back charges. Examples, photos and actual case studies will be presented for the benefit of the audience.

PT Elongations Best Practices: Structural Engineer
Don Kline, Kline Engineering & Consulting

The process of documenting, reviewing, and approving post-tensioning stressing records is often misunderstood by the project team members, and in many instances this confusion leads to frustration and delays on the project. This presentation will focus on how the Licensed Design Professional (LDP) fits into this process. Specifically, this presentation will review the responsibilities of the LDP with respect to review and approval of the post-tensioning stressing records. Code requirements related to elongations and approvals will be covered. ACI 318 requirements are somewhat confusing and this topic will be reviewed and clarified. Elongations that are outside of the +/-7 percent range can cause delays on projects. Acceptance criteria for approval of the stressing records will be covered, and practical methods of reviewing and accepting elongations that fall outside of this range will be reviewed. The LDP’s responsibility with respect to timing of review will also be covered.

PT Elongations Best Practices: PT Installer
Robert McKiernan, Commerical Metals Company

The Installation of Unbonded Monostrand Post Tension tendons is well defined by ACI and PTI documents. However, some of those best practices are often challenged by the complexity of some projects and the congestion with reinforcing steel and embeds of all sorts, sometimes resulting in last minute changes with direct consequences on the elongations measurements. This presentation will focus on the most common field changes that impact PT stressing results and also the composition and role of the stressing crew. Specifically, this presentation will review the key points for a proper tendon installation, the management of changes at the field level with PTI level 2 personnel and the various steps of the stressing operation. It will emphasize the safety concerns and work flow disruption caused by out of tolerance elongations and how the stressing crew deals with them.

PT Elongations Best Practices: General Contractor
Justin Doll, Mortenson

Reinforced Post Tensioned Buildings are very common in the US. The use of PT allow for lighter structures and faster building schedule. The stressing operation is extremely time sensitive, with any delay having direct consequences on the project’s work flow and overall schedule. This presentation will outline the timing of the stressing operation in a typical multi stories building and the various steps involved in the measurements of the elongations. In particular, this presentation will review the flow and cycle of the formwork and how to minimize any schedule’s disruption, due to elongation’s approval issues. We will also consider the owner’s position in this and the overall impact on the acceptance of the project.

Panel Discussion
Marc Khoury, CCL, USA
Don Kline, Kline Engineering & Consulting
Robert McKiernan, Commercial Metals Company
Justin Doll, Mortenson
These four speakers will join forces in a round-table panel discussion to collaborate with responses to frequently asked questions and new questions posed by the session attendees.

 

Committee Meeting

Committee Meeting

2018 PTI Convention

Technical Session

Technical Session

2018 PTI Convention

Exhibit Hall

Exhibit Hall

2018 PTI Convention

Special Events

Special Events

2018 PTI Convention

Exhibit Hall

Exhibit Hall

2018 PTI Convention

Networking Events

Networking Events

2018 PTI Convention

Awards Ceremonies

Awards Ceremonies

2018 PTI Convention

Exhibit Hall

Exhibit Hall

2018 PTI Convention

Committee Meeting

Committee Meeting

2018 PTI Convention

Technical Session

Technical Session

2018 PTI Convention

Comradery

Comradery

2018 PTI Convention

Social Events

Social Events

2018 PTI Convention

Committee Meeting

Committee Meeting

2018 PTI Convention

Exhibit Hall

Exhibit Hall

2018 PTI Convention

Committee Meeting

Committee Meeting

2018 PTI Convention

Future PTI Conventions

PTI 2019 Convention

May 5-8, 2019
Hyatt Regency Seattle
Seattle, WA, USA

PTI 2020 Convention

May 3-6, 2020
Hilton Miami Downtown
Miami, FL, USA

PTI 2021 Convention

April 18-21, 2021
Westin Indianapolis
Indianapolis, IN, USA

 

How Do I Get PDH Credit?

Earn PDH Credit during Convention

To request a PDH certificate for the PTI Convention, fill out and submit this form. PTI is a Registered Continuing Education Provider through RCEP.

Past Technical Presentations

Are you looking for Technical Presentations from past Conventions? Click here.