S-Frame Analysis is owned and developed by S-FRAME Software Inc. It is a complete 4D structural modeling, analysis and design solution for steel, concrete, linear and non-linear structural models. Full product details can be found on their website https://s-frame.com.
S-Frame can export and import .dxf files. If Tekla Structures and S-Frame are installed on the same computer, then a direct link can be used. A copy of the link can be requested from S-FRAME Software Inc. Descriptions regarding the link can be found here: Building information modeling (BIM) links.
In some areas S-Frame used to be distributed by CSC, in which case the installation points to different folders. The model name must not include spaces as this currently is an issue as the analysis and design frame is not created if spaces are included.