Advanced Steel Construction

Vol. 7, No. 1, pp. 27-47 (2011)



N. Baldassino and R. Zandonini *

Department of Mechanical and Structural Engineering, University of Trento,

38123 Povo, Trento, Italy

* (Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)




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Industrial racks are one of the most common structures for the storage of palletised goods. The behaviour of these structures, which are built-up from thin-walled cold-formed steel profiles, is quite complex. The sensitivity of the uprights to buckling, the presence of the perforations on the uprights, the non linearity of the connections, the frame sensitivity to the second-order effects and the influence of the imperfections are the main sources of complexity. The large variability in terms of geometry of the profiles, of the joints and of the perforations, and the complexity of the phenomena which affects the member behaviour do not yet allow performing a pure numerical design, but call for tests aimed at the characterisation of the structural components. Traditionally, the design of the racks is carried out by a procedure combining experiments and numerical analysis. This approach follows the so-called 'design by testing'. This paper intends to provide an overview of the experimental part of the approach. The specifications in the European and the North American standards are reviewed for the main structural components, i.e., the uprights, the upright frames and the joints. Problems related to the clarity, accuracy and completeness of the specifications are pointed out. The main results of some studies carried out by the authors provide a key to better understanding of the importance of testing.



Industrial racks, design by testing, experimental analysis, numerical analysis, member buckling, semi-rigid joints


[1] Ghersi, A., Landolfo, R. and Mazzolani, F.M., "Design of Metallic Cold-formed Thin-walled Members", Spon Press, London and New York, 2002, pp. 164.

[2] Hancock, G.J., "Design of Cold-formed Steel Structures", Australian Institute of Steel Construction, 2nd Edition, 1994, pp. 240.

[3] CEN, "EN 15512, Steel Static Storage Systems - Adjustable Pallet Racking Systems - Principles for Structural Design", CEN European Committee for Standardization, 2009, pp. 137.

[4] AS, "AS 4084 - Steel Storage Racking", AS Standards Australia, 1993, pp. 41.

[5] RMI, "MH 16.1- Specification for the Design, Testing and Utilization of Industrial Steel Storage Racks", RMI - Rack Manufactures Institute, 2008, pp. 59.

[6] Timoshenko, S.P. and Gere J.M., "Theory of Elastic Stability", 2nd Edition, McGraw-Hill Book Company, New York, 1961, pp. 541.

[7] Hancock, G.J., "Ligth Gauge Construction", Progress in Structural Engineering and Materials, 1997, Vol. 1, No. 1, pp. 25-30.

[8] Trahair, N.S., "Flexural-torsional Buckling", E & FN Spon, London, UK, 1993, pp. 420.

[9] Gioncu, V., "General Theory of Coupled Instabilities", Thin-Walled Structures, 1994, Vol. 19, No. 2-4, pp. 81-128.

[10] Pekoz, T., "Development of a Unified approach to the Design of Cold-formed Steel Members", American Iron and Steel Institute, Research Report, CF87, No. 1, 1987.

[11] Weng, C.C. and Peköz, T., "Residual Stresses in Cold-formed Steel Members", Journal of Structural Engineering, ASCE, 1990, Vol. 116, No. 6, pp. 1611-1625.

[12] Moen, C.D., Takeru Igusa and Schafer, B.W., "Prediction of Residual Stresses and Strains in Cold-formed Steel Members", Thin-Walled Structures, 2008, Vol. 46, No. 11, pp. 1274-1289.

[13] LaBoube, R.A., Yu, W.W., Langan, J.E. and Shan, M.Y., "Cold-formed Steel Webs with Openings: Summary Report", Thin-Walled Structures, 1997, Vol. 27, No. 1, pp. 79-84.

[14] Zienkiewicz, O.C., "The Finite Element Method", 3rd Edition, McGraw-Hill Company, London, UK, 1977, pp. 787.

[15] Cheung, Y.K., "Finite Strip Method in Structural Analysis", Pergamon Press, Oxford, New York, 1976, pp. 232.

[16] Schardt, R., "The Generalised Beam Theory, Instability and Plastic Collapse of Steel Structures", Proceedings of the M.R. Horne Conference, University of Manchester, Granada, London, 1983, pp. 469-475.

[17] Davies, J.M. and Leach, P., "First-order Generalised Beam Theory", Journal of Constructional Steel Research, 1994, Vol. 31, No. 2-3, pp. 187-220.

[18] Davies, J.M., Leach, P., and Heinz, D., "Second-order Generalised Beam Theory", Journal of Constructional Steel Research, 1994, Vol. 31, No. 2-3, pp. 221-241.

[19] El-Sawy, K.M. and Nazmy, A.S., "Effect of the Aspect Ratio on the Elastic Buckling of Uniaxially Loaded Plates with Eccentric Holes", Thin-Walled Structures, 2001, Vol. 39, No. 12, pp. 983-998.

[20] Moen, C.D. and Schafer, B.W., "Experiments on Cold-formed Steel Columns with Holes", Thin-Walled Structures, 2008, Vol. 46, No. 10, pp. 1164-1182.  

[21] Moen, C.D. and Schafer, B.W., "Elastic Buckling of Thin Plates with Holes in Compression or Bending", Thin-Walled Structures, 2009, Vol. 47, No. 12, pp. 1597-1607.

[22] Eccher, G., Rasmussen, K. and Zandonini R., "Elastic Buckling Analysis of Perforated Thin-walled Structures by the Isoparametric Spline Finite Strip Method", Thin-Walled Structures, 2008, Vol. 46, No. 2, pp. 165-191.

[23] Baldassino, N. and Hancock, G.J., "Distortional Buckling of Cold-formed Steel Storage Rack Sections including Perforations", Proceedings of the Fourth International Conference on Steel and Aluminium Structures (ICSAS '99), Elsevier, Espoo, Finland, 20-23 June 1999, pp. 131-138.

[24] Sajja, S.R., Beale, R.G. and Godley, M.H.R., "Shear Stiffness of Pallet Rack Upright Frames", Journal of Constructional Steel Research, 2008, Vol. 64, No. 7-8, pp. 867-874.

[25] Markazi, F.D., Beale, R.G. and Godley, M.H.R., "Experimental Analysis of Semi-rigid Boltless Connectors", Thin-Walled Structures, 1997, Vol. 28, No. 1, pp. 57-87.

[26] Baldassino, N. and Bernuzzi, C., "Analysis and Behaviour of Steel Storage Pallet Racks", Thin-Walled Structures, 2000, Vol. 37, No. 4, pp. 277-304.

[27] Baldassino, N. and Zandonini, R., "Performance of Base-plate Connections of Steel Storage Pallet Racks", Proceedings of the International Colloquium dedicated to the 70th Anniversary of Professor Victor Gioncu, May 7-8 2004, Timisoara, Romania, pp. 11-20.

[28] CEN, "Eurocode 3 – Design of Steel Structures – Part 1-8: Design of Joints", CEN European Committee for Standardization, 2005, pp. 133.

[29] Harris, E. and Hancock, G., "Stability Testing of Sub-assemblages of High Rise Steel Storage Racks", Proceedings of the International Conference on Advances in Structures (ASSCCA '03), Sidney, Australia, 22-25 June 2003, Vol. 1, pp. 251-256.

[30] Giovannini, M., "On the Response of Industrial Racks" (in Italian), Master Thesis, University of Trento, 2008, pp. 137.

[31] Galea Y. and Bureau A., "PEP Micro – Manuel d'Utilisation", Centre Tecnique Industriel de la Construction Métallique (CTiCM), France, 1998.

[32] Bajoria, K.M. and Talikoti, R.S., "Determination of Flexibility of Beam-to-column Connectors used in Thin Walled Cold-formed Steel Pallet Racking Systems ", Thin-Walled Structures, 2006, Vol. 44, No. 3, pp. 372-380.

[33] Kozłowski, A. and Ślęczka, L., "Preliminary Component Method Model of Storage Rack Joint", Proceedings of Connections in Steel Structures V, Amsterdam, June 3-4 2004, pp. 253-262.

[34] Baldassino, N. and Zandonini, R., "Performance of Base-plate Connections of Steel Storage Pallet Racks", Proceedings of Fifth International Conference on Coupled Instabilities in Metal Structures (CIMS2008), Gregory J. Hancock Symposium, Sydney, Australia, 23-25 June, 2008, pp. 119-130.

[35] Sarawit, A.T. and Peköz, T., "Cold-formed Steel Frame and Beam-column Design", Report of a Research Project AISI-RMI, Report 03-03, 2003, pp. 330.

[36] Scandola, A., "Analysis of Industrial Racks" (in Italian), Master Thesis, University of Trento, 2007, pp. 129.

[37] del Coz Díaz, J.J., García Nieto, P.J., Betegón Biempica, C. and Fernández Rougeot, G., "Non-linear Analysis of Unbolted Base Plates by FEM and Experimental Validation", Thin-Walled Structures, 2006, Vol. 44, No. 5, pp. 529-541.