Archived Tekla product documentation To access archived Tekla product documentation in Trimble Downloads, please click the links below, sign in and download the offline packages. Tekla Structures 20202019i20192018i2018 Tekla PowerFab 2022i20222021i20212020i20202019i2019 Tekla Structural Designer 2022202120202019i20192018i2018 Tekla Tedds 20222021202020192018