Movement of the rack attachment portion 1140 relative to the frame attachment portion 1120 is allowed by bending of the attachment member 1100 about a junction between the spring portion 1130 and the frame attachment portion 1120 and/or around a junction between the spring portion 1130 and the rack attachment portion 1140. Therefore, the front left attachment member 1100, upon being affixed to the rack 10 and the rack-supporting frame 102, may absorb vibrations subjected by the rack system 100. The spring portion 1130 may thus allow the rack system 100 to more easily absorb vibrations generated by an environment of the rack system 100, such as vibrations caused by seismic activity, or by the displacement and/or installation of racks. This can in turn improve the stability of the racks 10 on the rack-supporting frame 102. Moreover, as will be understood, the elastic deformation of the front left attachment member 1100 is provided relatively inexpensively as it is a result of a bending operation to form the spring portion 1130, rather than having for example a separate resilient component to impart the elasticity of the front left attachment member 1100.