Graphisoft typically includes several sample projects with each version (e.g., Archicad 26, 27, 28). They fall into three categories:
Select the facade. Note: The curtain wall has a custom scheme. The frames are 150mm, but the transoms are 50mm. The architect used "Pattern Selections" to rotate panels by 45 degrees. Copy this curtain wall into your own embedded library. archicad sample projects