Compatibility We suggest that you complete any unfinished models using your current version of Tekla Structures. This version is not backwards compatible. When you create or save a model in Tekla Structures , you cannot open it in older versions due to database differences. Tekla Structures can only be installed on bit Windows operating systems. Tekla Structures See the hardware recommendations for more information.
There's more: Tekla Structures Release notes Tekla Structures main version features Tekla Structures includes a customizable user interface, contextual toolbar and enhancements that make modeling quicker and easier and design communication more effective. New links improve interoperability.
How to create a Curved rafter Portal frame - Tekla Structures 2017i