Tall mass timber structures are becoming increasingly prevalent and, with some now rising as tall as 81m (Abrahamsen, 2017) it is vital to consider design for structural robustness and disproportionate and progressive collapse prevention under accidental actions (Starossek & Haberland, 2012). The Eurocode 1-7 approach (European Committee for Standardization, 2006) focuses on material independent objective-based design. An inherent robustness through alternative load paths (ALPs), primarily catenary action, is targeted through introduction of vertical and horizontal ties. This is a prescriptive approach without the necessary physical basis when introducing novel construction methods
