Industrial buildings (manufacturing plants, warehouses, production workshops, and machine rooms), in order to meet usage requirements, require the addition of cranes, filing cabinets, machinery and equipment, and containers, etc., before (or after) the installation. A detection is needed to assess the current floor's load-bearing capacity to ensure it meets the safety requirements for the additional equipment. Recommendations for reasonable reinforcement should be provided for components that do not meet the load-bearing or safety usage requirements.
The scenarios for house structure inspection and appraisal can generally be divided into several categories:
When adding stories, inserting floors, or making other structural modifications to buildings.
(2) When there is significant functional degradation in the building structure itself or明显的tilt. Such as cracks in the building structure, deformation of beams and columns, leakage of reinforcement in floor slabs, or vibration in the building structure.
(3) In cases where external forces may cause damage to the building structure, such as collisions with vehicles or falling objects, impacts, leakage of corrosive gases or liquids, and intentional destruction.
(4) In cases where disputes arise due to justified suspicions about structural issues, stemming from design, construction, or usage reasons. This situation is quite common and can even lead directly to judicial appraisals. It often involves suspicions of substandard work or poor construction quality by the contractor, which could result in structural defects, leading to conflicts with the contractor. In such instances, an objective assessment by a third party is required.
(5) From the perspective of maintaining the building structure, understanding the current state and reliability of the structure throughout the intended use period is crucial. Structures that can enjoy such benefits are typically of higher status, such as historical buildings, monumental structures, and large public buildings. The intended use period refers to the number of years the structure is expected to remain in use through necessary repairs and maintenance.
(6) When the intended use, conditions, or requirements of a building structure are to be altered. This includes scenarios where the new use increases the load on the structure or alters the original structural layout, such as converting an office building into a nursing home, a classroom into a library, or removing or weakening load-bearing components. In these cases, structural inspection and assessment are mandatory.

How to select a sampling plan during the structural safety assessment of buildings: When conducting structural safety assessments of buildings, the sampling plan should be chosen based on the characteristics of the items to be tested, adhering to the following principles:
1. For the identification and testing of exterior defects in buildings, a full inspection plan should be adopted.
2. For structural connection inspection of buildings, sampling should be conducted on parts that have a significant impact on the structure.
3. For the load-bearing performance testing of building components, it is advisable to select components with relatively larger load effects and poorer construction quality among the same type, or representative components affected by disasters or environmental erosion for sampling inspection.
4. For the identification and detection of geometric dimensions and size deviations within a house, it is suitable to use a one-time or two-time counting sampling scheme.
5. Projects for inspection batches should be sampled randomly, and the smaller sample size must comply with the provisions of Section 3.3.13 of this standard.
6. During the safety assessment of building structures, sampling inspections should be conducted according to the "Unified Standard for Construction Quality Acceptance" G300 or the corresponding project construction quality acceptance specification's sampling plan.

Building safety inspections typically require inspectors to first formulate a corresponding inspection plan based on the actual on-site conditions. General inspection items include material strength testing, reinforcement configuration checking, structural deformation testing, crack detection, and other inspections.

Conduct a detailed investigation of the structural function and adverse environmental factors of industrial factory buildings, as well as potential changes they may undergo within the intended service life. Test the structural function or its effects if necessary.
1. Inspect the structural layout and construction, support system, structural members, and connections. Thoroughly detect any defects and damage in the structure, including those in load-bearing structures or members, support rods, and their connection nodes.
2. Inspect or measure cracks, displacements, or deformations in load-bearing structures or components; test the dynamic response and characteristics of the structure or components under significant dynamic loads.
3. Investigate and measure the deformation of the foundation, detect the impact of foundation deformation on the upper load-bearing structure, the protective structure system, and crane operation, etc. Excavation of the foundation for inspection may be necessary, as well as supplementary surveys or on-site load tests.
Core Drilling Method: Semi-Destructive Method.
Subject to not affecting the load-bearing capacity of the structure or components, local destructive tests are conducted directly on the structure or components, or core samples are drilled for destructive testing, and the estimated value or characteristic strength of the strength standard value is calculated.