For models up to 400 cm, insert the ground tube (packed in the top section of the mast) 60% into the ground. The lower mast section slides over the remaining 40%. For models from 600 cm, you dig the ground tube about 70% into the ground. The lower mast section protrudes into the remaining 40% of the ground tube. To prevent subsidence in soft ground, you can place a brick or tile under the ground tube to be dug.