# Connection of Identical and Different Walls

For wall connections such as corner joints and T-joints, there are two fundamental situations:

* Both walls use the same HRB pre-run file.
* Both walls use different HRB pre-run files.

Both situations can be resolved using the HRB module.

To avoid making the description overly complicated, the text will repeatedly refer to one file connecting to another file. Of course, a file cannot literally connect to another file; rather, one wall connects to another wall. When the following text states that file A connects to file B, it means that a wall using pre-run file A connects to a wall using pre-run file B.


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