Here’s a step-by-step guide to finding and downloading (GDL components) from reliable sources.
If the "long piece" is structural (like a timber beam or steel channel): archicad 20 library objects free top download
Whether you are a veteran architect who prefers the stability of version 20 or a student working on an academic project, finding high-quality, compatible objects is a challenge. The default Graphisoft library is robust, but it often lacks niche furniture, specific vegetation, or regional construction details. free ArchiCAD 20 library objects Here’s a step-by-step
(formerly ArchiCAD GDL Library)