Prefabricated reinforcement can help save time and labour on site because the welded steel cages can be simply placed into position without the need for tying on site. Many contractors who are not used to fixing steel on site, or who are time-limited usually prefer the prefabricated steel reinforcement option.
When using prefabricated cages, most of the complexity can be taken out of the project during the re-detailing and cage manufacturing process. This means that any errors in the drawings, omissions of bars or issues such as over-crowding can be resolved prior to the reinforcing steel arriving on site.