CFS 10

CFS® is a comprehensive general-purpose cold-formed steel component design tool that performs calculations according to the AISI 2016 Edition of the North American Specification for the Design of Cold-Formed Steel Structural Members, and the 2002 Edition of the ASCE Specification for the Design of Cold-Formed Stainless Steel Structural Members (ASCE-8-02).

System requirements:

  • Windows Vista, 7, 8, 8.1, 10 (32-bit or 64-bit)
  • Microsoft.NET Framework 4.5

Supported specifications:

  • 2016 AISI - ASD, LRFD, and LSD
  • 2012 AISI - ASD, LRFD, and LSD
  • 2010 AISI - ASD, LRFD, and LSD
  • 2007 AISI - ASD, LRFD, and LSD
  • 2004 AISI - ASD, LRFD, and LSD
  • 2001 AISI - ASD, LRFD, and LSD
  • 1999 AISI - ASD and LRFD
  • 2002 ASCE - ASD and LRFD (stainless steel)

The Section Wizard makes it quick and easy to create the geometry for common shapes and the graphical interface allows you to create virtually any cold-formed steel shape, including closed shapes, built-up sections, and elements with holes. You may choose from a long list of predefined carbon and stainless steel materials, or customize the material properties as needed. Additionally, several libraries are provided for commonly available component shapes in the industry. Shape geometry can be output to a DXF file.

The Analysis Wizard assists in the creation of design problems such as beam-columns, continuous beams, and multi-span beams with laps. Analysis problems consist of members, supports, braces, loadings and load combinations. Transverse loads may be concentrated or distributed, and applied at any angle, thus producing biaxial bending. Axial loads may include eccentricities which induce additional moments. You can display and print diagrams for reactions, shears, moments, and deflection, including envelope diagrams for all load combinations.

Computations include:

  • Full, net, and effective section properties using exact integrations
  • Strengths for compression, tension, moments, shears, and web-crippling
  • Strength increase from cold work of forming
  • Member checks for combined axial/bending, bending/shear, and bending/ web-crippling
  • Messages are given for exceeded limits such as w/t, D/t, KL/r, etc.
  • Complete documentation is included as an integrated help file.

A powerful feature of CFS is the elastic buckling analysis of any cross-section using the finite strip method. Some shapes may be subject to a mode of buckling where the section distorts. This tool helps the engineer to utilize the Direct Strength Method (DSM) according to the AISI Specification.

CFS is free to download and install. Without the purchase of a full license, the application will run in "light" mode with a reduced set of features and limitations on section complexity. This mode is ideal for educational use and will give you a feel for what the full CFS software has to offer. You may then choose to purchase a license for the full version CFS. Here is a comparison between the full and light modes.

Description Light Full
Maximum elements per part 5 254
Maximum parts per section 1 254
Holes in elements  
Access section libraries
Import geometry from DXF files  
Save geometry to DXF files  
Carbon steel materials
Stainless steel materials  
Custom material properties  
Create section libraries  
Full section properties
Net section properties  
Effective section properties
Strength increase from cold working  
Torsion properties  
AISI - ASD, LRFD, and LSD methods
Fully braced strengths
Axial/Bending member checks
Shear/Bending member checks
Web-crippling/Bending checks
Direct Strength Method  
Elastic buckling analysis  
Analysis Module
Continuous beams  
Multi-span beams with laps  
Axial and lateral loads  
Numerous support and bracing options  
ASD and LRFD load combinations  
Diagrams for shear, moment, and deflection  
Locations of critical check points  

CFS10 Automation Module

For users of CFS 10, this optional software component provides the full computational engine of the CFS application for customized automation of cold-formed steel calculations in your own applications. There are numerous ways to use this library, including spreadsheet macros, creation of spreadsheet tables, automated design checks using external analysis data, and even full-fledged structure design automation.

System requirements:

  • Windows Vista, 7, 8, 8.1, 10 (32-bit or 64-bit)
  • Microsoft.NET Framework 4.5
  • Development environment supporting COM or .NET 4.5
  • CFS 10 software installed and licensed (network or standalone)

The calculation methods in CFS10 can use existing section files or sections libraries created using CFS, or you can define new sections "on the fly" to analyze. These methods perform operations such as retrieval of section information, computation of gross section properties, net section properties, effective section properties, fully braced strengths, and design checks for axial, bending, shear, web-crippling, combined axial/bending, combined shear/bending, and combined web-crippling/bending.

The CFS10 module includes complete documentation of the objects, methods, and properties, and some sample code to get you started. This documentation is available from our Download page.

This product is incorporated into the structural analysis application VisualAnalysis for performing cold-formed steel design checks on 3D structures. The VisualAnalysis software is offered by Integrated Engineering Software.

RSG Software, Inc.
2803 NW Chipman Road
Lee's Summit, MO 64081

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