The main procedures required for rural house safety assessment include the following steps:

1. Site Selection Safety Assessment: Conducted an investigation into the surrounding environment of the selected dangerous housing renovation sites, and performed safety assessment work. The assessment results are categorized into two levels: "Dangerous" and "Basic Safety."

2. Investigate the basic condition of the house: Conduct on-site measurements and inspections of the reconstruction of dilapidated houses to obtain the current status of the house structure.

3. Hazardous Assessment of Building Components: Conduct on-site measurements of the foundation, load-bearing structures, and protective structures of the危改房, and evaluate them separately into four grades: a, b, c, and d.

4. Comprehensive House Hazard Assessment: Conduct hazard evaluations for each component of the危改 houses and categorize them into four levels: A, B, C, and D.

5. Processing Recommendations: Assess the overall hazardous condition of the houses undergoing identification, and propose corresponding demolition plans or reinforcement measures.

6. Provide an Assessment Report: Establish a model that corresponds to the dangerous renovation housing, conduct a risk level assessment and analyze related situations, and based on this, propose corresponding solutions.

Houses are categorized into four risk levels: A, B, C, and D. Level A houses have a structurally safe condition with no hazardous points. Level B houses have some structural components in a hazardous state, but it does not affect the main structure. Level C houses have local hazards with some structural components in a dangerous load-bearing state. Level D houses have overall hazards, making them unsuitable for normal use.

Rural housing renovation and construction must control the new building area for demolition and reconstruction while meeting basic living functions and safety requirements. If it is actually necessary to allocate by household, in principle, the floor area for new construction or renovation of houses for households with 1-3 members should be around 40-60 square meters.

The primary method for rural dilapidated house verification and appraisal is through on-site verification and appraisal. Based on on-site inspections, the house damage is comprehensively assessed, and the risk level of the house can be classified into four grades: A, B, C, and D.

Grade A: No hazardous points.

B Grade: Contains Hazardous Points

C Level: Local Hazard

D危险等级：Overall Hazard

Grade A: Structure meets normal usage requirements; no hazardous points found; building structure is safe.

B Grade: The structure generally meets normal usage requirements; however, some individual structural components are in a dangerous condition, which does not affect the overall structural safety, and still meets the basic requirements for normal usage.

Grade C: Some load-bearing structures fail to meet normal usage requirements, with localized hazards present, forming locally dangerous buildings.

D Grade: The load-bearing structure no longer meets normal usage requirements; the entire building is in danger, constituting a whole-building dangerous structure.

Grade A:

1. Foundation: The foundation remains stable with no significant uneven settlement.

2. Walls: Load-bearing walls are in good condition with no visible stress cracks or deformation; there is no loosening or shedding at the corners or intersections of the vertical and horizontal walls. Non-load-bearing walls may have slight cracks.

3. Beams and Columns: Beams and columns are intact with no visible stress cracks or deformation. The joints of beams and columns are undamaged and free from cracks.

4. Floors and Roofs: No obvious stress cracks or deformation on the floor and roof plates; no loose joints or cracks at the plate-to-beam connections.

B Grade:

1. Foundation: The foundation remains stable with no significant uneven settlement.

2. Walls: Load-bearing walls are mostly intact with no visible stress cracks or deformations; no loosening or shifting is observed at the corners of walls or at the intersections of longitudinal and transverse walls.

3. Beams and Columns: Beams and columns have minor cracks; joints of beams and columns are undamaged, no cracks.

C Grade:

1. Foundation: The foundation remains stable, with minor damage observed on the base.

2. Walls: Most load-bearing walls have minor cracks or obvious cracking in some non-load-bearing walls; some load-bearing walls exhibit significant displacement and tilting; non-load-bearing walls generally have pronounced cracks; at some end walls and intersections of longitudinal and transverse walls, there are noticeable loosening and shifting.

3. Beams and Columns: Beams and columns exhibit cracks but have not reached the limit state of bearing capacity; some beam and column joints show evident damage and cracking.

4. Floors and Roofs: Significant cracks in floors and roofs; loose joints and evident cracks at the connection points of floor/roof boards with walls and beams; some roof panels have collapsed.

Grade D:

1. Foundation Base: The foundation has essentially lost stability, with localized or overall collapse of the base.

2. Walls: Load-bearing walls show significant tilting, partial crumbling, or collapse; corners and intersections of longitudinal and transverse walls are generally loose and cracked; non-load-bearing walls and parapets have local collapses or severe cracking.

3 Beams and Columns: Severe failure at beam and column joints; general cracking in beams and columns; noticeable deformation and displacement in beams and columns; some column bases have significant sliding, with tilting and partial collapse in certain areas.

4th Floor, Roof: The floor and roof boards are generally cracked, with some severely cracked; there is loosening and severe cracks at the junctions of the floor and roof boards with the walls and beams, with some roof panels collapsed; the roof frame is twisted and shifted, with some parts of the roof collapsed.

5. Floors and Roofs: Floors and roofs have minor cracks but no significant deformation; there is some loosening and minor cracks at the joints between boards and walls or beams; the trusses are not tilted; there is no obvious displacement at the connection between trusses and columns.

6. Minor Components: Non-bearing walls, walls of the stairwell protruding from the roof, etc., have slight cracks; finishing layers such as plaster may have cracks or localized loose sections; some components are in a hazardous condition.