Steel structure plant small and medium span steel structure requirements

In the construction of steel structure plant, usually need to use a large number of small-span steel frame structure, we do not underestimate them, and their structure is also related to the quality of the construction of steel plant, so steel structure plant structure of small-span steel structure There are several requirements:
Steel plant
1, variable cross-section rigid frame generally only change the section height without changing the width of the same rod, the minimum cross section height and height ratio, should be controlled at 0.3-0.6; rod width and height of the larger, the smaller value.
2, rigid frame hinge pin, should adopt a certain degree of embedded structure, this time the column can be bent by 20% of the column cross-section bending capacity.
3, rigid frame beams add axillary height does not exceed 1/2 of the beam, in the analysis of rigid frame, it can not be included in the influence of the addition of axillary, only in the calculation of section calculation.
4, when the corner frame node and roof ridge nodes connected by the end plate, according to the solid connection calculation, the node should adopt high-strength spiral connection, the thickness of the end plate should not be less than the diameter of the bolt, the bolt arrangement should be as much as possible Close to the beam flanges, webs and stiffeners, to reduce the bending of the end plate.
5, the end plate and beam welding should be cross-section beams and other strong, when using fillet weld connection, the leg size generally available 1.7t.
6. In the corner of the rigid frame, the inner flanges of the beams and columns can be reinforced with slender or wall beams to provide gussets for the lateral support of the inner flange.