The rapid development of modern science and technology progress and social productivity accelerate the process of modern human civilization, at the same time, the human society is faced with a series of major environmental and development problems of serious challenges. Excessive resource consumption and environmental pollution and ecological destruction problems such as threaten human survival and development.

Was still in the stage of rapid economic development in our country, as a large number of consumption of resources, environmental construction, there should be full implementation of green construction, undertake the social responsibility for sustainable development. Cast-in-place concrete roof construction formwork supports system, usually adopt wood square do keel support system including the ringlock scaffoldign metal deck.

. Adopt the supporting system, need to cost a lot of wood square, complicated operation, workload is big, construction efficiency is low, material flow, low utilization rate and the recovery of residual value is very small, not enough to meet the requirements of green construction of ringlock scaffolding.

Main keel size: C - type 1:2.68 m - 4.39 m, C - type 2:2.28 m - 3.68 m, C - type 3:1.77 m - 2.88 m, C - 4:1.17 m - 1.78 m, the main keel and vice to lap, form template support flat roof, the whole bearing the weight of the roof and the casting is produced by pressure. The main keel and poling lap, form template support.

Deputy keel: deputy keel is composed of beam body and at the ends of the card, hanging in the main keel at the ends of the groove, and the main keel forming solid lap, deputy keel center distance of 30.5 cm, margin of 24.5 cm. Deputy keel according to its length in four kinds of size: 2.79 m, 2.44 m, 2.1 m, 1.57 m, by the size of the deputy keel quality support area and support, can make the main keel with parallel main keel clearance on the surface of the wall is not greater than 290 mm.