Abstracts of the papers of the researchers of School of Engineering and Construction to be submitted to International Colloquium on BIO-Based and Bio-Inspired Environmentally Compatible Structures to be held in April 09 – April 13, 2015. Joint Colloquium is organized by two working groups of International Association for Shell and Spatial Structures (IASS): Timber Spatial Structures (IASS-WG 12) and Environmentally Compatible Structures (IASS- WG 18) in collaboration with Tokyo Denki University.