Based on your search for "long piece" objects for Archicad 20, it sounds like you are looking for specific architectural elements like long spans of cabinetry, shelving, benches, or structural beams.
Here is a guide on where to find the best free library objects for Archicad 20, specifically targeting "long" items, and how to use them.
The dedicated user forum has a "Objects Sharing" thread with thousands of legacy files. Users upload everything from parametric stairs to vintage furniture. Because the files are peer-reviewed, they are generally safe. Look for posts tagged [GDL for AC20]. archicad 20 library objects free top download
ArchiCAD 20 already includes built-in libraries (Object Library 20, Library 20, Fixture & Equipment 20).
If you need to reinstall or download them separately:
⚠️ These are not “extra” objects but the default library. For new free objects, see below. Based on your search for "long piece" objects
.gsm or .lcf files.For those looking for free ArchiCAD 20 library objects, several websites and repositories offer a variety of objects. These can include:
Graphisoft's Community Forum and Website: Graphisoft encourages the sharing of library objects among users. The company's website and community forums have sections dedicated to library objects where users can download and share objects. Graphisoft Community / Help Center → Search for
ArchiPacks: A popular destination for ArchiCAD users seeking to expand their library. ArchiPacks offers a range of free and paid library objects.
CAD-Disp: A site that provides various CAD resources, including ArchiCAD library objects. Users can find and download objects for free.