Dilapidated buildings refer to buildings that have serious structural problems or potential safety hazards that may pose a threat to the safety of the lives and property of residents. The appraisal of dilapidated buildings is to evaluate and judge the structure and safety of buildings, mainly for those buildings that have serious structural problems and may pose a threat to the safety of people's lives and property. The purpose of the appraisal is to ensure the safe use of the building and to take appropriate measures to protect people's lives and property in the event of danger. In the appraisal of dilapidated houses, the contents that need to be tested and identified are roughly as follows:
Inspect the structural type of dilapidated building, understand its design, construction and use history, and obtain relevant structural drawings and technical information.
Through on-site testing and calculation analysis, the load-bearing capacity of the structure is evaluated in accordance with current standards and regulations. Conduct detailed inspection and inspection of key parts of the structure, such as the bearing capacity and cracks of beams, columns, slabs and other components.
Consider the overall and local stability of the structure, as well as the interaction between the structure and the foundation.
Inspect the overall structural layout and structure of the dilapidated house to assess whether it meets the basic requirements for the structural stability of the building. Through on-site testing and analysis calculations, the overall stiffness and stability of the structure are evaluated in accordance with current standards and regulations.
Conduct detailed inspection and detection of key parts of the structure, such as the displacement and deformation of foundations, walls, columns and other components.
Consider the stability of the structure under the action of **, wind load, etc., as well as the interaction between the structure and the foundation. 
Inspect the structural deformation of dilapidated buildings, such as settlement, inclination, cracks, etc., to understand their distribution and rules. Through on-site testing and analysis calculations, the deformation of the structure is evaluated whether it complies with the current standards and regulations, as well as the impact of the deformation on the performance of the structure.
Conduct detailed inspection and detection of key parts of the structure, such as damage and cracks in foundations, beams, columns and other components.
Consider the deformation tendency and damage accumulation of the structure during long-term use. Conduct detailed investigation and analysis of cracks in dilapidated houses to understand their distribution, morphology, trend and causes.
Evaluate the impact of cracks on structural performance, such as load-bearing capacity, durability and safety, through on-site inspection and testing.
According to the nature and characteristics of the crack, the corresponding treatment measures and suggestions are proposed. Consider the crack damage of the structure under the action of **, wind load, etc.
Check the danger and seismic resistance of the dilapidated house, and understand its history and seismic fortification requirements.
Through on-site inspection and analysis calculations, the seismic performance of the structure is evaluated to meet the current standards and regulations. Conduct detailed inspection and testing of key parts of the structure, such as the seismic resistance and damage of foundations, beams, columns and other components.
Consider the reaction and damage of the structure under the action of **, as well as the interaction between the structure and the foundation.