What precautionary measures must be taken before putting a loading crane into operation?

The selected combination of answers, securing the vehicle against tilting with side supports and ensuring there are no electrical lines in the swiveling range, is essential for safe crane operation. According to German traffic regulations, these precautions help prevent accidents and ensure the stability of the vehicle during loading and unloading.

Securing the vehicle with side supports prevents it from tipping over when the crane is in use, which is crucial given the loads and movements involved. Additionally, ensuring that there are no electrical lines in the swiveling range is vital to avoid electrocution or damaging electrical infrastructure, which could result in serious safety hazards.

The missed answer, checking whether support is absolutely necessary on the sides, is also important as it addresses the need for assessing the specific conditions of the site where the crane is operated. This step ensures that all safety measures are taken before lifting operations begin. Overall, all three precautions contribute to a comprehensive safety standard required by German traffic laws when using loading cranes.