This video, created by ConXtech’s Chief Structural Engineering Officer, gives a very thorough introduction to engineering with the ConX System.


Codified and Certified Technology
The ConXL™ SMF connection is codified  by the American Institute of Steel Construction (AISC) and published in AISC 358-10 Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications for use by structural engineers worldwide. It is also approved by the Office of Statewide Health Planning and Development (OSHPD) for use in California hospital facilities and the Division of the State Architect (DSA) for use in California schools. ConX is LA city (LABDS) approved and meets special detailing requirements for the most demanding seismic loading as well as the current U.S. Department of Defense anti-terrorism standards for blast and progressive collapse resistance.

Getting Started
The inherent robustness, as well as the simplicity of a systems approach enables the Structural Engineer of Record (SEOR) to quickly grasp and efficiently apply the ConX technology. Engineers quickly become proficient in designing with ConX because the system utilizes a finite number of structural connections to achieve a wide range of structural configurations. The system has been scrupulously reviewed, tested through 90+ full-scale destructive tests, documented and proven – with over 10 Million square feet designed/built to date. The ConXtech team is here to assist you in designing with ConX, but the inherent simplicity means it won’t be long before you are the expert.

ConXtech has created a Design Instructions for the Structural Engineer document to assist engineers in understanding and most efficiently utilizing the ConX System. To obtain your copy of the document, please contact us at

Benefits of Designing with a Robust System
In a ConX structure, each primary connection within the steel frame is a moment connection which typically eliminates the need for brace frames or shear walls within the structures. This enhances architectural freedom thus reducing time expended coordinating between engineering and architectural teams as plans evolve.

Design Support
ConXtech provides guidance and support to the SEOR and has a compliment of established capabilities in engineering, detailing, manufacturing (fabrication), and construction. This collaborative effort often begins with the SEOR providing conceptual drawings or architectural plans to ConXtech. Applying a variety of simple rules of thumb, columns and beams are arranged to adapt to the proposed floor plans in a way that can optimize ConX framing capabilities. Framing overlays (gridlines) are produced electronically – and can be efficiently distributed for review, input and approval by all of the relevant parties.

Once the framing plan has been agreed upon, the SEOR is aided in the development of their analytical model of the structure with the appropriate stiffness and strength of all the elements. ConXtech can help optimize the entire frame to meet code specified drift and strength limits, and provides further guidance in the design of the building floor system for composite action, vibration performance, and service deflections taking advantage of the bi-axial fixidity of the ConX connections. ConXtech can create an independent analysis model of the framing in order make recommendations to the SEOR as to the most efficient column and beam sizes for the building frame.

Tools Beyond the Connection
In addition to the ConX collar assembly, ConX structures employ a set of pre-engineered gravity connections, web opening details, beam lateral bracing, column splice details, column bases, as well as optional cladding attachments, stair details, and foundation details. Once the SEOR has finalized the framing plan, ConXtech can provide electronic drawings of the general notes, and details with supporting calculations for review and inclusion in the CD document set. ConXtech is also developing a ConXCAD toolkit that will assist the entire team in collaboratively integrating the ConX System into Building Information Modeling (BIM) and Analysis programs.

Plan Review
During the review process, ConXtech is ready to serve as a resource in assisting with the response to any plan check comments by drawing upon the wealth of relevant data gathered in past plan checks, peer-reviews and pre-qualification reviews.

Design Support During Manufacturing
After the building is approved for manufacture (fabrication), ConXtech can provide a Certified ConXtech Fabricator with complete collar assembly components, frame member shop drawings, QC and QA plans, and expert guidance in the proper methods of fabricating the building frame.

Design Support During Construction
During construction, ConXtech is available to provide expert advice in the erection of the building frame, inspection of the installation, response to RFI’s, periodic observation, and final compliance verification.

At every stage of the project, from conceptual planning through to final compliance, ConXtech’s experienced staff stands ready to assist the SEOR on questions related to design, detailing, analysis, approval, fabrication, and construction of the building frame.

For questions or more information please contact us at 510-264-9111 or