Technical support is available to licensed customers using
the latest version of CFS®. But before contacting us, please
review the following.
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:
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.
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.
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
Several AISI standards and other technical documents are available to download from
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.
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
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.
Copyright © 2018 RSG Software, Inc.
2803 NW Chipman Road
Lee's Summit, MO 64081