The installation and renovation of steel structure engineering with additional floors is a new type of reinforcement and reform situation, which has advantages in many aspects. Compared to concrete construction techniques, it is more convenient and concise, has higher cost-effectiveness compared to cost-effectiveness, and has significant advantages in terms of safety. However, this method is not yet widely used domestically and internationally, and its design is somewhat lacking.

钢结构加层改造研究在我国很早就有了，比房屋加层改造起步还早。建筑结构改造、加固以及钢结构工程的发展迅速，为了更好的完成旧建筑物的加层和改造工作。我国先后成立了许多房屋加层改造技术的学术团体，使钢材结构加固改造这一团体学术团体内学术气氛浓郁，创造了经验探讨的交流环境，推动这钢结构加层改造的发展。

The research on steel structure adding story renovation has existed in China for a long time, which is even earlier than the start of building adding story renovation. The rapid development of building structural renovation, reinforcement, and steel structure engineering aims to better complete the addition and renovation of old buildings. China has established many academic groups on the technology of adding floors to buildings, creating a strong academic atmosphere in the group of steel structure reinforcement and renovation, creating an exchange environment for experience exploration, and promoting the development of this steel structure reinforcement and renovation.

钢结构加层改造也称为外套框架加层结构，在加层层数比较多或者是不太方便在原结构上直接加层的建筑物时可以运用钢结构加层改造。外套框架加层架构分为分离式和整体式两个大类，分离式结构加层时可以和之前的旧房结构完全脱开；整体式结构加层则是在旧房结构的基础上进行加层改造，连成整体。

Steel structure story adding transformation, also known as outer frame story adding structure, can be used in buildings with more story adding layers or where it is not convenient to directly add layers on the original structure. The outerwear frame adding layer architecture can be divided into two categories: separated and integral. When adding layers to the separated structure, it can be completely detached from the previous old house structure; The integral structure of adding floors is based on the old building structure and is renovated to form a whole.