In the framework of H2020, the EuroCirCol project has the outcome of producing a conceptual design of the Future Circular Collider within 2019. One of the main targets is designing a superconducting magnetic dipole able to reach 16 T, in order to bend the beams within energy and size constraints. This magnetic field can be achieved using Nb3Sn conductors at their highest performances.
The present contribution deals with 2D mechanical studies aimed at designing a suitable support structure for the cosθ dipole option. Both the single aperture and the double aperture configurations are taken into consideration. Promising solutions have been found, based on the rather new bladders and keys system. These solutions are able to guarantee acceptable pre-stress to the 16 T magnet, even considering the huge Lorentz forces. Such solutions fulfill also the goal of keeping the stress on the superconducting cables below 150 MPa at room temperature and below 200 MPa at 4 K. Potentially dangerous detachment of the coil from the inner pole are also avoided. Also the stress induced in the supporting materials (i.e. austenitic steel for the collar, electrical steel for the yoke and titanium for the inner pole) are kept below each corresponding yield limits.