Steel structure buildings are pre welded, pre drilled and pre drilled in the factory, which means they can be quickly and conveniently installed on your construction site. The steel structure has light weight and high strength. At present, the problem of steel structure is stability, which must be considered in design, that is, strength. Because economic durability is basically the most important requirement.
The reason for opening is that the steel beam web bears small bending moment, and the shear force is not enough to strengthen the hole; The purpose of opening is to save materials and reduce dead weight. Sometimes, holes can also pass through pipelines. With small dead weight, the load is small and the load is small. It is beneficial for 99% of the structure (except for anti overturning and anti floating). As for strength, the structure is designed. If necessary, opening is not allowed. The maximum stress of the steel beam is located at the upper and lower edges, and the thinning or even opening in the middle has little effect on the performance. The cost will be reduced by 10% if the strength of steel structure is met.
