There have been many problems in the construction of old houses since ancient times, and it is easy to collapse if one is not careful. So the safety of the construction is a top priority. Then, whether the structural safety of the building can meet the safety requirements? What tests are needed? Test Content 1. The overall structure of the building inspection, including the building's current use, the overall deformation, and so on; 2. The sampling inspection of the concrete strength of the superstructure; 3. The inspection of the main structural member in the upper part of the building, including the section size, reinforcement and damage. 4. According to the test results, the static and seismic bearing capacity of the superstructure is checked. 5. The safety of foundation is evaluated according to the on-site test results. 6. The structural safety appraisal report is compiled based on the above results. And in accordance with the specific conditions of the building respectively proposed treatment proposals. Zhejiang Zhonghe Engineering Testing Co. , Ltd. , is approved by the Industry and Commerce Bureau, the quality and Technical Supervision Bureau of the establishment of housing safety testing, housing safety appraisal, strengthening design, structural strengthening, building repair technology research and development and professional services integration of the post-construction services. The company has strong technical force, rich experience, reasonable professional structure, the number of engineers who have been engaged in appraisal work for many years, the number of technical personnel engaged in building inspection appraisal, the company's high salary specially hires a number of senior engineers in the industry, materials engineers, structural engineers, construction engineers, external expert pool to enhance the company's overall strength, and long-term and large-scale Mechanical Laboratory, Research Institute to establish a cooperative mechanism.