conxl™ aisc prequalified connection - ConXtech

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TECHNICAL SUMMARIES:

CONXL™ AISC PREQUALIFIED CONNECTION

ConXtech’s ConXL connection has been through a rigorous qualification review process conducted by the AISC 358 - Connection Prequalification Review Panel (CPRP). ConXL was approved through this process and has been incorporated as Chapter 10 in the 2010 AISC 358 code book, Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications. ConXtech completed six successful tests of its moment connection for the CPRP under the unprecedented biaxial test protocol which subjected the ConXL connection to the typical Seismic Provisions cyclic loading while simultaneously subjecting the connection to a constant orthogonal load equal to 100% of the probable maximum moment (Mpr) of the primary beams. No other steel framing connection has been subjected to this type of loading as the ConXtech connections are the only standard biaxial steel moment connections in the market today.

SMF CONNECTION

AISC’s CPRP reviews connection test data and prequalifies connections in accordance with the AISC Seismic Provisions. The connections that gain approval of the AISC CPRP reviews are considered a prequalified connection standard. A moment connection prequalified by the AISC CPRP provides the most recognized and direct method of satisfying the Seismic Provision’s conformance demonstration requirements for SMF and IMF connections and simplifies the project approval process for this class of buildings.

CONTACT US ConXtech, Inc. 6701 Koll Center Parkway, Suite 150, Pleasanton, CA 94566 E-mail: [email protected] | Phone: 510-264-9111 | www.ConXtech.com ConXtech’s products and processes are patented. For more information, please see www.ConXtech.com/patents. Copyright © 2000-2017 ConXtech, Inc. All rights reserved.

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TECHNICAL SUMMARIES:

CONXL™ OSHPD APPROVAL PROCESS

The ConXL™ connection is qualified as a Special Moment Frame connection for use in hospital environments with the California Office of Statewide Health Planning and Development (OSHPD). OSHPD observed the successful completion of three full scale biaxial tests, which met OSHPD’s test protocol designed specifically for ConXtech’s connection. ConXtech also completed 3 additional tests following this protocol for AISC CPRP qualification. This qualification is unique as no other steel moment frame has undergone cyclic testing while simultaneously being subjected to a constant orthogonal load equal to 100% of the probable maximum moment (Mpr) of the primary beams. This unprecedented biaxial testing proved the unique capabilities of the ConXtech moment connection, the only standardized true biaxial moment connection in the steel framing market today. ConXtech’s ConXL System is well suited for healthcare facilities and has provided the structural frame for dozens of medical office buildings as well as health support buildings and university medical and health centers. Recent OSHPD projects include a 75,000 square foot hospital addition at NorthBay Medical Center in Fairfield, CA, and an ER addition at Centinela Hospital in Inglewood, CA. To see the breadth of ConXtech’s healthcare portfolio, visit: http://www.conxtech.com/projects/healthcare/

CONTACT US ConXtech, Inc. 6701 Koll Center Parkway, Suite 150, Pleasanton, CA 94566 E-mail: [email protected] | Phone: 510-264-9111 | www.ConXtech.com ConXtech’s products and processes are patented. For more information, please see www.ConXtech.com/patents. Copyright © 2000-2017 ConXtech, Inc. All rights reserved.

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TECHNICAL SUMMARIES:

CONXTECH® TEST FRAMES

ConXtech has two in-house test frames capable of qualifying cyclic tests of beam-to-column connections per the AISC Seismic Provisions. Through this testing and a rigorous review process, ConXL™ has been prequalified by AISC and incorporated as Chapter 10 of the AISC 358 code book: Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications.

Biaxial test frame

ConXtech’s biaxial test frame was developed to satisfy the conformance demonstration requirements for a biaxial SMF connection that may be required for prequalification in any jurisdiction. It is capable of qualifying cyclic testing about the primary axis, while simultaneously imposing an orthogonal load across the secondary moment beams equivalent to the primary beams probable maximum moment (Mpr). The self-equilibrating frame has the capacity of imposing, along the primary axis, a 1,000 kip load at the top of the column while resisting 700 kip reactions at beam ends; and along the secondary axis, impose 700 kip loads at the beam ends while resisting a 1,000 kip reaction at top of column. Due to the ConX™ moment connection’s unique position as the only standard biaxial connection on the market, new testing protocol was developed and approved by the California Office of Statewide Health Planning and Development (OSHPD). The ConXL System has been prequalified for use in OSHPD structures through these unprecedented conformance requirements, with testing conditions no other steel moment connection had ever been subjected to.

Single axis test frame

ConXtech’s original single axis test frame can test moment beams up to a W30x99, while its biaxial test frame can test up to a W36x262. These test frames provide ConXtech with unparalleled access to efficient and cost effective testing for project specific requirements.

CONTACT US ConXtech, Inc. 6701 Koll Center Parkway, Suite 150, Pleasanton, CA 94566 E-mail: [email protected] | Phone: 510-264-9111 | www.ConXtech.com ConXtech’s products and processes are patented. For more information, please see www.ConXtech.com/patents. Copyright © 2000-2017 ConXtech, Inc. All rights reserved.

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TECHNICAL SUMMARIES:

RESISTANCE TO PROGRESSIVE COLLAPSE

The terrorist attacks of 1995 (Murrah Federal Building) and 2001 (World Trade Center) focused attention on structural design requirements to prevent the catastrophic damage caused by these events. However, creating practical design requirements for such severe loading proved to be an extremely difficult task. Because prescriptive and performance requirements for blast and progressive collapse mitigation do not appear in the design codes, they are not codified into law. The owner, architect and structural engineer are the key stakeholders who carry the responsibility in deciding if the need for blast and progressive collapse resistance is necessary. Generally prescriptive design procedures for blast and progressive collapse resistance result in inefficient costly construction and limitations on the architectural design of such buildings thus are rarely implemented on a project that doesn’t have GSA, DoD or State Department requirements. In 2004, Ronald Hamburger of Simpson Gumpertz & Heger wrote an article(1) discussing the high costs and architectural limitations of current prescriptive design methods. He felt there was a much more cost effective performance based design method, but the industry needed “a program (1) “Design of Steel Structures for Blast-Related Progressive Collapse Resistance” Modern Steel Construction, March 2004

-Ronald O. Hamburger, Simpson Gumpertz & Heger -Andrew Whitaker, University at Buffalo, NY

of research and development similar to that conducted after the 1994 earthquake to determine the types of connection technologies that can be effective in resisting progressive collapse so that less conservative but more reliable approaches to blast-resistant design can be adopted by the community.” ConXtech’s ConXR framing connection debuted in 2004 and the ConXL connection in 2008. With the ConX System, the key stakeholders now have the option of specifying a structural framing system that will carry gravity, wind and seismic loading and also provide resistance to blast and progressive collapse, all in one efficient structural framing system. The innovative and highly robust ConX framing system provides a cost effective and easily configurable biaxial moment frame connection that also provides blast and progressive collapse resistance. In 2009 Ronald Hamburger wrote a paper(2) on the ConX connection in which he stated: “The ConXR and ConXL systems are ideal for building applications that must be designed to resist progressive collapse resulting from vehicle impact, incendiary or explosive device attack.”

(2) “The ConX Connection: A Bolted Special Moment Frame Connection for Seismic and Structural Integrity Applications” March 2009 -Ronald O. Hamburger, Simpson Gumpertz & Heger

CONTACT US ConXtech, Inc. 6701 Koll Center Parkway, Suite 150, Pleasanton, CA 94566 E-mail: [email protected] | Phone: 510-264-9111 | www.ConXtech.com ConXtech’s products and processes are patented. For more information, please see www.ConXtech.com/patents. Copyright © 2000-2017 ConXtech, Inc. All rights reserved.

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