Frame Scaffolding compared with the general structure, the working conditions has the following features:
1, by load variation;
2, fasteners, belong to semi-rigid connection nodes and node rigid size is associated with fastener quality, installation quality, node performance there is a big variation;
3, frame system scaffolding structure and component of initial defects, such as initial bending of bar, rust, erection of dimension error, the eccentric load, etc.;

4, and the wall connection, bigger binding variation on the frame scaffolding. The above accumulation and statistical data, the study of the problems of the lack of system does not have independent probability analysis condition, so the structural resistance adjusting multiplied by the coefficient of less than 1 its value system with using the safety factor of the calibration. Therefore, the specification adopts the design method of essentially belongs to half probability. The structure of the scaffold to satisfy the provisions of this specification requirement is the basic conditions of design and calculation.

The process flow
1, shelves, the erection process:
Before the solid foundation of the line, upright position to put sweeping bar, vertical rod and sweep the floor and rod fastening of the small bar, with vertical stem and sweeping rod fastening - the first step in the big bar and rod with the fasten to first step putlog.

And the second step of ledger - the second step putlog - adding temporary inclined strut, the top step and the second main rail fastening column (installed and dismantled after connecting rod) - the third step, four main rail and small rail - column installed on the second floor and the pull rod - stud - shear brace - laid scaffolding, tie protection and foot, hanging safety net.
2, the frame body and the structure of the tubes