We are pleased to inform the scientific and professional public that the members of the Institute have been accepted to participate in the COST Action CA20139 - Holistic design of taller timber buildings (HELEN) - https://cahelen.eu, funded by the European Commission. The action was approved for funding during 2021-2025. The design of taller timber buildings should be performed with intensive collaboration among the architects, structural, fire, acoustic engineers etc. The action addresses multi-storey timber buildings from a collaborative and interdisciplinary perspective, considering static, dynamic, fire, acoustic, human health and other aspects in parallel. Through interdisciplinary analysis and interaction, the action wants to develop holistic design guidelines that will enable safe construction of taller timber buildings, as well as respect human well-being demands, through intense interdisciplinary work and interaction between different design backgrounds, as well as between academic and design professionals. The action will be attended by Prof. dr Marija Nefovska Danilović and Assist. Prof. dr Miroslav Marjanović, within the WP2: Deformations and Vibrations.