1. The construction speed is fast, the steel structure can provide larger space and more spacious construction area for the construction. The pillars of steel structure engineering generally take 3-4 layers as a construction section, lifting at the scene, and the lifting of the pillars, the installation of steel frame, the pouring of reinforced concrete core tube, the construction of combined floor, etc., can implement parallel three-dimensional cross operation. There is time to install columns and frames on the upper part, while the lower part can be decorated internally and decorate the project. Therefore, in the guarantee of technology, supply, management and other conditions, can be put into use in advance. The construction period of steel structure engineering of some domestic high-rise buildings is shown in Table 2. It can be seen that compared with reinforced concrete structure, steel structure of 30-50 floors can shorten the construction period by about 8-12 months. With the development, application, experience and accumulation of steel structure in high-rise buildings, the construction speed can be accelerated.
2. The quality of steel structure is easy to guarantee. Steel structure components are generally manufactured in the factory, just installed at the site, high processing accuracy, labor saving, the site is more civilized. Reduce the sand, stone, cement stacking site, but also reduce the template storage and transportation, on-site components precast and reinforced concrete cast-in-place wet operation, in the downtown or dense residential area has a great advantage.
3. Steel structure buildings are easy to transform in the process of use, such as reinforcement, height connection, expansion of the floor and other segmentation, change is relatively easy and flexible. Some developed countries believe that steel structures are environmentally friendly buildings that can be reused to reduce the exploitation of mineral resources.
4. Steel structure can be made into large span and large space. The large plane office of open type, get bigger development after 60's, some countries call "garden office". This office requires a larger column grid layout, and the smaller the column section, the more appropriate. The use of a column net of 12-15M has become common. Steel structure is suitable for this requirement, because it can form a more spacious column-free space for flexible internal arrangement.
5. Convenient pipeline layout. In the structural space of steel structure, there are many holes and cavities, and the web of steel beam also allows to pass through pipelines of less than a certain diameter, so that the layout of pipelines is more convenient, but also increase the net height of the building, and the replacement and repair of pipelines are convenient.
6. Due to the superiority of steel structure itself, steel structure buildings can be green buildings. Steel structure itself is a green and environment-friendly product, which has been strongly supported by the competent government departments and supported by national policies.
