Answer:
A glTF file contains a 3D model that is saved in "GL Transmission Format" (glTF). This 3D model can be viewed in any glTF viewer or, for example, integrated into your own web pages using JavaScript. You can rotate the model by holding down the mouse button or zoom it using the mouse wheel. You can see an example here:
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This 3D model is saved with the RFEM or RSTAB file by default. However, you can also export it separately (see Image 01).
You can find more examples on our homepage under Downloads → Models for Download (see the link below this FAQ).