Tunnels are often reinforced with transverse ribs. These can now be modeled as curved beam elements located at specific intervals in the 3D Tunnel Designer. The option to add transverse girders, together with plate and volume lining, rockbolts, and umbrella arches, enables modelling complex tunnel reinforcement systems. Girders are a natural component in the slicing and sequencing features of the Tunnel Designer, enabling you to define the entire construction sequence. - Generate beam element at each slice transition - Change slicing to increase or decrease girder density (slicing) - Or use tunnel splitting tool to increase or decrease girder density (slicing) and control sequencing independently. NOTE: This feature depends on product level or SELECT entitlement