Tekla was BIM before BIM was invented 

                 
Highly detailed as-built building information models enable the highest level of constructability and production control. Centralizing model and non-model based data into the Tekla model allows for more collaborative and integrated project management and delivery from conceptual design to construction.

Tekla Structures BIM software provides an accurate, dynamic, and data-rich 3D environment that can be shared by contractors, structural engineers, steel detailers and fabricators, as well as concrete detailers and manufacturers.