Guitai Engineering Inspection Sichuan Branch officially handles factory inspection and appraisal services, covering: building inspection, structural inspection, steel structure factory inspection, kindergarten campus inspection, and construction quality and safety inspection. We provide customers with inspection and appraisal reports.
Factory Safety Inspection Definition: Factory safety inspection is the process of checking the condition of building structural damage and analyzing to judge the safety of the building.
I. Scope of Factory Safety Inspection: Building safety inspections are applicable to buildings that have shown signs of danger. During the inspection process, exterior wall inspections of the building structure are conducted using instruments such as leveling instruments and theodolites, including the detection of building settlement differences and tilt monitoring. Internal structural components of the building are inspected using equipment like concrete rebound meters, ultrasonic rebound meters, steel bar scanners, and steel tapes, providing data on the reinforcement, dimensions, sizes, and quantities of the building's steel reinforcement, as well as the concrete strength of the building components such as beams, columns, and slabs.
Factory safety inspections include the following basic contents:
1. Investigate the property's usage history and structural system.
2. Measure the house's tilting and uneven settlement conditions.
3. Document the damaged areas, extent, and scope of the main structure and load-bearing components of the building using methods such as text, drawings, photos, or videos.
4. The testing items for the mechanical properties of building structural materials should be determined based on the need for structural load-bearing calculations.
5. As necessary, establish a verification model based on the characteristics of the building structure. According to the actual mechanical properties of the building materials and the actual loads, verify the safety reserve of the building structure in accordance with the current specifications.
6. Analyze the causes of property damage.
7. Comprehensively assess the condition of structural damage to the house and determine the level of danger. House safety inspections should be conducted according to the "Standard for Dangerous Buildings" CJ13. When conducting safety inspections on industrial buildings, compliance with the provisions of relevant standards such as the "Reliability Standard for Industrial Buildings" G144-90 is also required.

The structural composition of single-story industrial buildings generally falls into two types: wall-bearing structure and frame-bearing structure.
The load-bearing structure of the walls consists of brick and brick columns for the exterior walls.
The skeletal load-bearing structure is composed of reinforced concrete or steel components forming the framework. The skeletal structure of the factory consists of the following components, with the walls serving only as protective barriers.
(1) Roof structure
Including roof panels, rafters (or roof beams), skylight frames, brackets, etc.
Roof panels are directly laid on the rafters or roof beams, bearing the loads above and transferring them to the rafters or roof beams.
The roof truss (roof beam) is the main load-bearing component of the roof structure. The loads on the roof panels and skylights are all supported by the roof truss (roof beam), which is placed on the columns.
(2) Crane Beam
The crane beam is placed on the saddle legs extending from the columns, bearing the weight of the crane, the lifting capacity of the crane, and the impact force generated when the crane brakes, transmitting these loads to the columns.
Column
The columns are the main load-bearing components of the factory building, supporting the roof, crane beams, loads from the walls, as well as wind loads transmitted from the gable walls, and transfer these loads to the foundation.
(4) Basic
Supports all the loads acting on the columns, as well as a portion of the wall loads on the foundation beam, which are then transferred to the ground through the foundation. The foundation is designed as a shallow foundation.
(5) Exterior Wall Protection System
Including the exterior walls, wind-resistant columns, wall beams, and foundation beams around the factory building. The loads these components bear are primarily from the walls.
And the self-weight of components as well as wind loads acting on the walls.
(6) Support System
The supporting system consists of two main parts: inter-column supports and roof supports. Its function is to enhance the overall stiffness and stability of the factory structure, primarily transferring horizontal wind loads and impact forces generated by cranes.
The factory load-bearing inspection primarily focuses on the load-bearing structural system, structural arrangement and support system, and the protective structure system of the three combined projects for factory load-bearing testing.
Before conducting a factory load-bearing inspection, it's crucial to understand the factory's structural form; by conducting on-site surveys, determine the dimensions, weight, operating loads, and layout of the equipment. Assess whether the load-bearing requirements in the equipment arrangement areas meet the original design specifications, check if the structural layout is reasonable, and whether the force transmission of components is direct. Extract core samples from some concrete components for third-party testing units to perform compression tests to obtain concrete strength data, and then use computer modeling to verify the load-bearing capacity of the floor.
Be mindful of cracks during the inspection of new equipment areas, and analyze the causes of the cracks and their potential harm to the structure; based on the mechanical properties of the building's structural materials, existing loads, usage, and structural system, establish a reasonable calculation model according to the test results, original design drawings, and standards, to verify the current safety usage capabilities of the building and review its structural measures, and write the building safety report meticulously. Furthermore, conduct a grading assessment of the factory's load-bearing capacity and propose reasonable suggestions for the placement of production equipment, taking into account the weight and other parameters of the equipment.

Scope of Business:
Building inspections for houses, factories, steel structures, etc.
1. Existing building structure safety, suitability, and durability inspections
2. Existing Building Seismic Performance Testing
3. Feasibility Assessment and Inspection for House Addition, Renovation, and Expansion
4. Steel truss structure, tall tower mast structure inspection
5. Structural Steel and Concrete Industrial Factory Inspection
6. Reliability Testing for Industrial Structures (chimneys, water towers, corridors, etc.)
7. Property Usage and Functional Change Inspection
8. Structural Quality Inspection for New or Under-Construction Projects
9. On-site Investigation and Inspection of Engineering Accidents
10. Continued Use Inspections for Buildings Exceeding or Approaching Design Service Life
Guotai Inspection Co., Ltd. holds the qualification for construction reliability in the construction industry, and undertakes various types of building structures, including steel structures, large-scale steel mills, and frame structures.
The reliability rating of industrial factory buildings should be divided into three levels: components, structural systems, and units. The ratings for both the structural systems and components levels should include safety and usability assessments, and the reliability level can be comprehensively evaluated when necessary. Safety is rated in four levels, usability in three levels, and reliability at each level is also rated in four levels. Assessments should be conducted at each level according to the specified evaluation items. If the reliability rating is not required, the safety and normal usability assessments can be provided directly.
Reliability analysis and verification should be conducted based on detailed investigations and test results, analyzing and verifying the reliability levels of the whole structure and its individual components, including structural analysis, safety and serviceability checks of structures or components, and analysis of the causes of existing issues. In the reliability of industrial buildings, if insufficient or inaccurate survey and test data is found, timely supplementary investigations and tests should be carried out.
The primary technical basis for factory quality inspections:
1. "Residential Quality Inspection Procedure" (DG J08-79-2008)
"2] Standard for Inspection Technology of Building Structures (GB/T50344-2004)"
"3] Code for Load Design of Building Structures (G009-2012)"
"4] Engineering Survey Specification (G026-2007)"
"5] Code for Deformation Measurement of Buildings (JGJ/T8-2007)"
"6] Concrete Structure Design Code (G010-2010)"
"7] Technical Code for Concrete Compressive Strength Test by Rebound Method (JGJ/T23-2011)"
"8] Engineering design, construction, and inspection related specifications and standards;