The programs given here have been developed at School of Civil and Environmental Engineering, Cornell University, under the sponsorship of American Iron and Steel Institute. They are for evaluation and educational purposes only and shall not be used for commercial purposes.
Every possible effort is made to develop these programs as sound engineering software. However the developers, School of Civil and Environmental Engineering, Cornell University and AISI expressly disclaim all liability for damages of any sort whether direct, indirect or consequential, arising out of the use, reference to or reliance on these programs or any of their components.


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Online User's Manual

CU-EWA is a computer program developed by A. Sarawit  to compute the nominal flexural strength, Mn and the nominal axial strength, Pn using two approaches: the AISI (1996) method initial yielding and the Proposed Design Approach for flexural members given by Schafer (1997), Schafer and Peköz (1999). This approach was shown to be applicable to complex stiffeners by Sarawit and Pekoz (2000).

This program uses the Mathworks, MatLab environment.


American Iron and Steel Institute, (1996). AISI Specification for the Design of Cold-Formed Steel Structural Members. American Iron and Steel Institute Washington, D.C.

Schafer, B.W., (1997). "Cold-Formed Steel Behavior and Design: Analytical and Numerical Modeling of Elements and Members with Longitudinal Stiffeners." Ph.D. Dissertation, Cornell University, Ithaca, New York

Schafer, B.W., and Peköz, T.P., (1999). "Laterally Braced Cold-Formed Steel Flexural Members with Edge Stiffened Flanges." Journal of Structural Engineering, 125(2)

Sarawit, A., Pekoz, T., Project Director, "A Design Approach For Complex Stiffeners -Final Report", Cornell University, Ithaca, New York, October 2000



Online User's Manual

CU-PBF is a FEM computer program developed by A. Sarawit to solve three types of problems involving the eigenvalue analysis: plate elastic buckling, free-vibration, and free-vibration with initial in-plane stresses. The program uses the finite element method with four-node rectangular thin plate elements. Various boundary conditions and perforations can be applied.

This program uses the Mathworks, MatLab environment.


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On line user's manual

CU-TWP is a computer program written by A. Sarawit to determine cross section properties of thin-walled members.A more recent version of this program is available at


CU-FSM is a finite strip developed by B. W. Schafer for the analysis of of thin-walled sections. A more recent version of the program is available at



CU-BEAM  developed by B. P. Gotluru is  for the analysis of single span and continuous beams. Performs a simple approximate geometric nonlinear analysis. User-friendly. Any arbitrary thin-walled sections can be accommodated. Also calculates and reports the section properties of the sections. Can be run on Windows 95/NT or above. Interactive help file is also available.


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Online User's Manual

CUSRF is a computer program written by A. Sarawit to analyze semi-rigid frames. A users manual will be available in future.