Indoor supporting means for supporting a template system in concrete construction, popular name is something called the branch formwork. From the large modern concrete universal, support for formworks are from the most traditional bamboo in a modern system, tools, standardization.

With the improvement of production efficiency, diversification and structural floor height, raise wages per worker, the traditional support system behind insecurity can not meet the requirements of modern concrete construction. It was followed by a pipe rack, portal, as well as single top (steel support) later introduced cuplock scaffolding system, ringlock scaffolding system and the like.

Indoor supporting still uses pipe rack scaffolding planks still occupy the current domestic building construction inside and outside scaffold still using tube rack, rack tube is characterized by small investment. However, due to the use of materials units of the blind pursuit of cheap and scaffolding malicious market competition, the domestic site currently can not see in full compliance with national standard products, but also there is a reason to support the current indoor accidents occur frequently; the other is due to the use of its locking fastener type, manual operation by a significant influence.

Frame scaffolding improved scaffolding planks unsafe drawbacks, but affected by the material itself of poor adaptability and inconvenient to carry, and the current domestic manufacturers are not strictly test builder's materials approach, resulting in a large number of products into the market of non-compliance, causing indoor security support potential problems.

Steel support was invented in the 1930s by the Swiss and put into use in the country. There is no specific standards, norms and standards related to the current indoor support are required to have a horizontal bar, and therefore the use of steel support in our region is limited to the local villages.