In Brazil, the structural design of industrial storage systems with perforated uprights is made using the Brazilian standard ABNT NBR 15524 - Storage systems - Part 2: Selective pallet racks (ABNT NBR 15524-2:2007, 2007). This standard is an adaptation of the British standard, BS EN 15512 - Steel static storage system - Adjustable pallet racking systems - Principles for structural design (EN 15512, 2009). Thus, most of the equations, as the buckling design curve, refer to the Eurocode (EN1993-1-3:2006, 2006). However, the cold-formed Brazilian standard ABNT NBR 14762 (ABNT NBR 14762:2010, 2010) uses theoretical equations based on the American standard (Specification & Members, 2016).
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The Brazilian standard for the design of cold-formed steel structures NBR 14762 (ABNT NBR 14762:2010, 2010) has theoretical formulations similar to the American standard AISI S100 (Specification & Members, 2016). However, NBR 15524 (ABNT NBR 15524-2:2007, 2007) formulations primarily share similarities with the design presented in Eurocode (EN1993-1-3:2006, 2006) since it is based on BS EN 15512 (EN 15512, 2009). The NBR 14762 (ABNT NBR 14762:2010, 2010) global buckling reduction factor is not calculated as Equation (2), but as follows:
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