A structural arrangement for a vehicle includes a body structure defining a longitudinal vehicle body axis and a lateral vehicle axis orthogonal to the longitudinal vehicle body axis. The body structure includes a lattice shear structure having a first structural member extending laterally from one side to an opposite side of the vehicle and a second structural member parallel to and longitudinally spaced apart from the first structural member, an upper shear panel extending longitudinally and laterally across the vehicle and joined to the lattice shear structure, and a seat attachment structure having a first end and a second end opposite the second end. The seat attachment structure is oriented longitudinally and is joined to both of the first and second structural members.