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.

鋼結構加層改造研究在我國很早就有了，比房屋加層改造起步還早。建筑結構改造、加固以及鋼結構工程的發展迅速，為了更好的完成舊建筑物的加層和改造工作。我國先后成立了許多房屋加層改造技術的學術團體，使鋼材結構加固改造這一團體學術團體內學術氣氛濃郁，創造了經驗探討的交流環境，推動這鋼結構加層改造的發展。

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.

鋼結構加層改造也稱為外套框架加層結構，在加層層數比較多或者是不太方便在原結構上直接加層的建筑物時可以運用鋼結構加層改造。外套框架加層架構分為分離式和整體式兩個大類，分離式結構加層時可以和之前的舊房結構完全脫開；整體式結構加層則是在舊房結構的基礎上進行加層改造，連成整體。

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.