The over Q345 steel is required in the material of portal frames and other parts need the type of Q235 steel.

Study on the steel structural characteristics of lightweight steel portal frame;

Erection technology of high lightweight steel portal frame;

Eight different span lightweight steel portal frames are analyzed with a finite element method in the paper.

In the light of that the portal strut light building structure,which has developed rapidly,possesses many quality problems,from the angles of the design and the construction,this paper probes into problems needing attention in the application of the portal strut light building structure,and puts forward some measures for solving these problems.

The author introduces the monolayer light portal frame structure and its characteristic,discusses the design of the portal frame light structure from the structure form,the structural arrangement,the frame design and the component design of the accessory structure,puts forward the principles followed in the design of the light portal frame structure to perfect the design of the structure.