Unmapped material
From Autodesk Revit into Tekla Structural Designer
Unrecognized material will be flagged during the import process into the Tekla Structural Designer software. Users will need to specify the Material Type and Grade of all unrecognized materials before being able to continue with the import processes.
Please note that mapping choices on import can only be set against the predefined material held in the Tekla Structural Designer database. It is not possible to map onto user defined material grades even if these exist within the model prior to the import process.

From Tekla Structural Designer into Autodesk Revit
It can be common to find that one or more materials require mapping. This is usually related to the Revit model or template not containing an appropriate grade to use.
We would recommend that users update their own templates so that all commonly used materials are held within.
Grades can be mapped as described later within this section, or by keeping the materials unmapped, corresponding materials will be generated.
The generated material will be created with the correct name and type (concrete, steel, wood etc.) but will contain no analysis information – this should not be a problem however, as we intend for all analysis and design procedures to be performed inside the Tekla Structural Designer software. The material creation process will also be listed in the log file.
