Support
Technical support is available to licensed customers using
the latest version of CFS®. But before contacting us, please
review the following.
CFS Help
CFS help documentation is incorporated into the CFS application.
You can launch this from the Help menu, or by clicking
or pressing F1 from most CFS windows. This documentation is also
available to access here:

Download CFS Help File
CFS License
To activate the license, choose Single User License or Network License Settings from the Tools menu in CFS.
For more information on activation and related topics, refer to
CFS Help - License Activation.
For complete network license details, refer to
CFS Network License Instructions.
CFS Tutorials

Technical Papers
The developer of the CFS software authored the following technical papers in support
of calculations utilized in the software. These investigations have also led to
consideration by AISI for inclusion the North American Specification.
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Quantitative determination of elastic buckling modes for cold-formed steel members
Annual Stability Conference, 2016
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Lateral-torsional buckling of general cold-formed steel beams
International Specialty Conference on Cold-Formed Steel Structures, 2016
-
Elastic lateral-torsional buckling of general cold-formed steel beams under uniform moment
Thin-Walled Structures, 2017
-
Flexural-torsional buckling of general cold-formed steel columns with unequal unbraced lengths
Annual Stability Conference, 2017
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Flexural-torsional buckling of general cold-formed steel columns with unequal unbraced lengths
Thin-Walled Structures, 2017
-
Parametric study of hole pattern influence on average bending stiffness
Annual Stability Conference, 2018
-
Distortional buckling of cold-formed steel flanges under stress gradient
International Specialty Conference on Cold-Formed Steel Structures, 2018
-
Distortional buckling of cold-formed steel flanges under stress gradient
ASCE Journal of Structural Engineering, 2020
-
Strength and stability of point-symmetric cold-formed steel members undergoing lateral-torsional buckling
Annual Stability Conference, 2020
-
Torsion analysis for cold-formed steel members using flexural analogies
Cold-Formed Steel Research Consortium Colloquium, 2020
-
Modifications to the Direct Strength Method of cold-formed steel design for members unsymmetric about the axis of bending
Thin-Walled Structures, 2022
-
Understanding Torsion Design for Cold-Formed Steel Members
Cold-Formed Steel Research Consortium Colloquium, 2022
-
Direct Strength Method: A Fresh New Appearance
Cold-Formed Steel Research Consortium Colloquium, 2022
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Strength-based requirements for end connections of built-up cold-formed steel columns
Thin-Walled Structures, 2023
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Enhancements to the Direct Strength Method of cold-formed steel member design
Thin-Walled Structures, 2023
Engineering Practice
The CFS application is not intended to guide you regarding
best engineering practices. Nor is the author in a position to
make recommendations on engineering practice. Such issues should
be pursued with engineers experienced in the type of construction,
educational institutions involved in related research, or the
appropriate building officials.
Specification Questions
Any specification is subject to interpretation when attempting
to apply it to real world situations. CFS makes some assumptions
in the calculations that it performs. These are explained in the
various portions of the documentation as related to each type
of calculation. Further interpretation of the AISI Specification
and the ASCE Specification, or any similar specification,
is beyond both the scope of this application and the responsibility
of the author. Such issues should be pursued with AISI or ASCE
as appropriate.
Several AISI standards and other technical documents are available to download from
CFSEI.
Verification of Computations
CFS has been used extensively for many years. Computational
bugs have been extremely rare in recent years, however it is still
possible that one could arise. If you disagree with an output,
you should first review all the inputs and their meanings, and
understand all the assumptions as stated in the documentation.
You can also use the trace feature to check the details of the
calculations. If you still disagree with an output, please report
it to us.
Suggestions
The CFS application has evolved through many phases of improvement
and refinement. To continue in this direction, comments are encouraged.
Whether you have a suggestion for a minor change, need a new feature,
or simply don't like the way something works, please send us your
comments.
Contacting RSG Software
The best way to contact RSG Software is by e-mail. This provides an
expedient method of reply and a convenient record of the correspondence.
RSG Software, Inc.
2803 NW Chipman Road
Lee's Summit, MO 64081
Technical%20Support
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