They can offer flexible configuration and quick mobilisation. When dismantled for shipping they may either be moved as large units, or broken down further to the size of standard freight containers. On assembly, a modular design allows choices of how much reach or lifting capacity to provide. The Sarens SGC-120 can be assembled with either the main boom alone, or with either a heavy duty or light duty jib in addition to this. The counterweight for the crane is composed of a series of open steel boxes, based on standard 40' freight containers, which can be filled with low-cost, locally sourced material such as sand, rubble or scrap metal. The ring itself has a footprint diameter of 45–55 m and a ground pressure of 20 tons / m2.
