You can simply do column forming by combining basic panels and outer corners. Belt is used for keeping column surface vertical against each other. There are two kinds of belts pipe belts and channel belt. Pipe belt join to the form with short grip. For columns larger than 60*60 cm channel belts with long grip are applied.
The section of round columns are consisted of two segments with 180 angle and they are connected to each other with an unbreakable steel clamps. These clamps are very stable and they are placed in their own position with impact of a hammer. The form of round columns are divided in to two types based on their diameter.