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In the paper the results of experimental tests carried out on double-sided semi-rigid beam-to-column joints applied in the typical pallet racking systems are presented and discussed. The applicable European design standard EN 15512 “ Steel static storage systems. Adjustable pallet racking systems. Principles for structural design” obliges to perform experimental research as part of a complementary process of designing this type of structures. At the same time, the test procedure described in the said document is defined only for single-sided joints, whereas in typical pallet racking systems, double-sides joints are dominating, due to the way the systems are constructed. Having in mind the above mentioned reasons, the series of tests for double-sided configuration of beams have been carried out, based on standard provisions, as well as other standardization and advisory documents of a similar nature. The obtained results of stiffness and bending moment capacity for double-sided joints have been compared to the findings of experiments performed in the past for single-sided joints only, presented in some earlier publications, e.g. [4] . [ABSTRACT FROM AUTHOR]

The article presents the results of experimental investigation carried on the structural members of a typical high storage racking system. The assessment of the mechanical characteristics and behaviour of the hooking beam-to-column joints were done in terms of shearing strength for one-sided configuration of beams attached. The experiments were performed in accordance with the guidelines contained in European standard EN 15512 “ Steel static storage systems. Adjustable pallet racking systems. Principles for structural design” . Shear strength, just right after the bending moment resistance is the basic mechanical parameter, characterizing this type of connections. The specific way the storage systems are performing their function, associated with the use of time-varying position of the beams and the exceptionally high rate of change in the size and position of the loads acting on the joints, tend to in-depth analysis of the shear phenomenon for this type of joints, very rarely used in any other structures. [ABSTRACT FROM AUTHOR]