Henan Hengji Housing Quality Inspection & Testing Co., Ltd., services include: housing inspections, school housing inspections, kindergarten housing inspections, community housing inspections, and Nanyang third-party old house inspections. The company is fully equipped with qualifications and equipment, capable of conducting inspections and testing on various housing quality and issuing valid certificates. It has obtained the CMA inspection and testing system certification!
In residential safety assessment, the detection and judgment of cracks in the building are essential inspection items. The surface cracks of the building can be categorized as: tiny cracks, moderate cracks, and through cracks.
The wider, longer, and deeper the cracks in a house, the more susceptible the steel reinforcement within its structure is to corrosion. Over time, exposure can threaten the strength of the steel cracks and concrete, thereby affecting the house's lifespan. Therefore, during safety assessment and detection of old houses in Nanyang, it is crucial to fully understand the analysis of cracks both indoors and outdoors.
Henan Hengji Building Quality Inspection Co., Ltd., services include: building inspections, school building inspections, kindergarten building inspections, community building inspections, etc. The company is fully equipped with qualifications and devices, capable of conducting inspections and tests on various building qualities and issuing valid certificates. It has obtained the CMA inspection and testing system certification!
Billboard appearance inspection
On-site inspection revealed that the steel columns of the billboard have paint peeling and rusting on their surfaces. Some parts of the column base anchor bolts are missing nuts, and the nuts are not properly tightened on the anchor rods. The truss rods of the billboard have severe paint peeling and rusting, while the rest of the components are in good condition with no obvious signs of damage.
1. Axle network dimensions and component geometrical dimensions review
On-site, the billboard's axis grid dimensions and component geometries are sampled and reviewed using steel measuring tapes and micrometers. Test results indicate that the deviation of the billboard's axis grid dimensions is within the allowable range specified by the standard, meeting the design requirements.
The table shows that, except for the deviation of the steel column wall thickness exceeding the specification requirements, the geometric dimensions of the other components basically meet the design requirements.
Billboard tilt detection
The total station was used to measure the offset values of the billboard steel column top relative to the bottom according to the relevant provisions of the deformation measurement point method. The test results show that the billboard steel column has shifted northward by 18mm with a tilt rate of 0.86‰, and eastward by 26mm. In the inspection of the old city's houses, the tilt rate was 1.24‰. Although the billboard steel column is slightly tilted, it is within the allowable range of 4‰ specified by the standard, meeting the usage requirements.
Henan Hengji Building Quality Inspection & Testing Co., Ltd., services include building inspections, school building inspections, kindergarten building inspections, community building inspections, etc. The company is fully equipped with qualifications and can conduct inspections and testing of various building qualities, issuing valid certificates. It has obtained the CMA Inspection and Testing System Certification!
Types and Characteristics of Building Cracks: Cracks can be roughly categorized into the following five types based on their causes:
Contraction cracks: Caused by the moisture variation of the material.
2. Thermal Cracks: Caused by expansion and contraction due to temperature changes, typically horizontal cracks along the perimeter beams at the top of a building (flat roof) and vertical cracks at window corners or structural joints.
3. Settlement Cracks: Wall cracks in a regular or inverted V-shape caused by uneven settlement of the foundation;沉降 cracks occur when the foundation support of the house settles, leading to settlement of the main structure above ground level, which results in cracks and poses a hidden safety hazard to the house.
4. Deformation Cracks: Wall intersection cracks caused by deformation; structural breakage issues due to house tilting.
5. Structural Cracks: Also known as load-induced cracks, vertical cracks occurring in structural beams, columns, and floor slabs due to loading action.
Henan Hengji Housing Quality Inspection & Testing Co., Ltd. boasts strong capabilities and reliable reputation, having accumulated a large number of loyal customers in consulting and research industries in Nanyang, Henan. Hengji Housing Inspection, with a mindset of continuous improvement and a spirit of innovation, partners with you to stride towards brilliance and co-create a beautiful future!
