A completed drywall may also end up with loads to attach - lamps, small shelves, or the like. Rigips and insulating material are of course not particularly supportive materials, so when it comes to fastening it can be a bit tricky. It is best to plan in advance so that nothing has to be attached to the drywall - if that is not possible, the only way to help is with the appropriate dowels that are suitable for drywall.
You can only fix very light loads with them, their load-bearing capacity is very limited. GK dowels look exactly like dowels for conventional, solid walls, but are equipped with a differently shaped thread. The same applies to anchor dowels. They cannot be used to attach carnis, curtain rails or the like. Even with lamps, this can sometimes be problematic.
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A possible alternative, however, is to firmly plaster the dowels with electrician's plaster in a larger hole - in some cases this holds light loads more securely.
Toggle dowels and cavity dowels
For heavier loads, only tilting or cavity dowels are suitable for fastening. Tilting dowels get their name because they have a tilting mechanism inside the wall that runs on a threaded rod, which distributes the weight of the load over a larger wall surface and at the same time secures the toggle dowel from slipping out. However, it can only be used where the cavity in the wall is deep enough to accommodate the threaded rod. Toggle dowels are mostly made of metal.
Alternatively, you can also use special cavity dowels made of plastic or metal to anchor loads securely in drywall. They also need less deep cavities such as toggle dowels, and can be used practically almost anywhere in drywall.
The load profiles and maximum loads for the individual dowels and the fastening instructions from the manufacturer should always be observed. Going to the maximum load limit of dowels is also not recommended - it is better to stay well below that. If the worst comes to the worst, you can still distribute the weight of heavy loads evenly over several holding points, which are then individually less stressed. The magic word here is "evenly".