The Penetrating Rooftop is a square/ triangular type of self support steel; round solid or angular latticed tower having a steel beam grid framing foundation. These beams are constructed on existing building columns to distribute the loads of the tower directly on columns, where the total load of the structure exceeds the roof load. The PRT is of light/ medium duty fixed base, economical, knockdown tower structure. These are designed for heights up to 25m.
The Non Penetrating Rooftop is a self-supported Light/ medium duty with a non-fixed square or triangular base. It is an economical, knockdown tower structure, triangular or square shaped with counter-weights, which brings a differentiated value to it. This type of rooftop is suitable for heights up to 15m.