In order to figure out the current building structure of the house and to understand the safety of the newly added two and three-story steel structure in the house, the safety inspection of the two and three-story steel structure in the house was carried out, and the inspection of the two and three-story steel structure in the house mainly includes the following contents:

1. Checking the basic situation, drawing information and the use of the house

2. the paper of the intact health inspection of the insertion layer

3. Measuring them

4. Strength test of the material of the inserted layer

5. Load bearing capacity test of the inserted layer

6.Structural safety analysis of the inserted layer

1. Testing Program

　　The process of evaluating the safety of houses under the action of earthquakes of specified intensities by testing the quality status of houses according to the specified seismic defense requirements.

　　2、Scope of application

　　Houses without seismic defenses or with defenses lower than the current regulations, especially protected buildings, urban lifeline projects and alteration and addition projects.

Seismic appraisal method is divided into two levels. The first level appraisal is based on macro-control and tectonic appraisal for comprehensive evaluation, while the second level appraisal is based on seismic calculation, combined with tectonic influence for comprehensive evaluation of the seismic capacity of the house.

Although the house insertion can improve the space, but if the private construction, failed to grasp the quality of construction, the use of the house will bring potential safety hazards.