Primary Framing System
　　The light steel portal type steel frame produces refer to the product which component manufactures and pre-assembling steel, steel column, steel beam, cold bending profile purlin and wall beam, profiling metal roofing panel and wall panel as well as support . ................................................................
[ Features of door frame ]
1.Using light roof, not only may reduce the section size of beam and column, the foundation also correspondingly reduces.
2.May make a large double slope roof with one fastigium in multi-span building, created the condition for long slope surface draining water. Making middle column may reduce the span of crossbeam, thus reduce the construction cost. Middle column is adopted the hinge swinged column made of steel pipe, occupies the small space.
3.The lateral steel rigid purline’s flange brace as guarantee, omit the longitudinal rigid component, and reduce the flange width.
4.The steel frame may use the variable cross-section, section and moment are the direct ratio; As variable cross-section, may change the web plate height as per requirement , thickness and flange width, achieving material to be used.
5.The web plate on steel frame may according to the cover width be designed, namely the permission of partial web plates lose steadily, and may use its flexure intensity. Therefore web plate ratio of height or thickness may be bigger than "Steel structure Design Standard" (GB50017) stipulated, reducing the web plate thickness.
6.The vertical load usually is the design control load, but works as when the wind load bigger or the house is higher, the wind load function should not neglect. In the light roof door frame, the earthquake role generally does not play the control action.
7.The strut can be made facilely, directly or with the horizontal node plate connection on the web plate, using tensile round steel.
8.The structural components may be made in the factory, and the industrialization degree is completely high. The component unit may be divided according to transport condition, between the units use the bolt in the scene to be connected.Conveniently fast Installment, little civil engineering construction