Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
Sonotube is the commercial name for a paper tube used for forming concrete. It is used when builders want to make a concrete pillar. They set up this paper tube (comes in diameters from 8 inches to 56 inches and in lengths to about 18 feet or so) and pour concrete into it and let it dry. When the concrete is dry, they strip the paper tube off, and voila, instant pillar.
