Building safety assessment is a crucial method to ensure that structures can be used safely and reasonably under various circumstances, such as before major repairs, before renovations or expansions, before changes in use or environment, when structures are to continue in use beyond their designed lifespan, during disasters or accidents, and when there are serious quality defects or significant corrosion, damage, or deformation.
The housing safety assessment work encompasses a variety of aspects, typically including the mechanical property testing of construction materials, structural construction measures inspection, structural member dimension checking, reinforcement position and diameter testing, detection of cracking and deformation of structures and members, as well as actual load performance testing of the structure.Chengdu Residential Property Assessment Company
Structural inspections are categorized by building type, including concrete, masonry, steel, and reinforced concrete composite structures. To assess the overall structural performance, load-bearing capacity, stiffness, or crack resistance of certain structures or components, static load tests can be conducted on their entire performance. For significant buildings and large public structures, dynamic structural testing is also available.
During the building safety assessment process, the structure is divided into three parts: components, sub-units, and assessment units. Components refer to individual elements such as beams, slabs, columns, brick walls, shear walls, etc.; sub-units are the division of a building (an independent structural system) into three sub-units: foundation, superstructure, and envelope, or can also refer to a collection of components, such as columns or beams on a particular floor; assessment units are independent structures (houses) with expansion joints or seismic joints, which should be considered as separate assessment units.
In the process of conducting a building safety assessment, the building safety inspector must first conduct a detailed investigation of the structure, including: an investigation into the building's usage conditions and environment; an investigation into the building's usage history; and an assessment of the current quality of the building.
The historical survey of building usage investigates whether the building itself has quality issues, such as whether the material strength meets requirements, whether the thickness-to-height ratio of masonry can reach the required standard, and whether the load-bearing capacity meets the usage requirements. This requires a building safety assessor to obtain information through detection and calculation methods. On the other hand, whether the building's structural system and construction measures meet design requirements and whether there are existing damages or deformities, requires on-site inspections and measurements to be obtained. The investigation items can be customized according to the purpose of the building safety assessment, and the key is to ensure the reliability of the investigation results through the adopted detection and assessment methods.
In necessary cases, a selective structural review and calculation should be conducted on the strength, stiffness, and stability of damaged components. Analyze, organize, and compile the data and information from inspections and recalculations into written charts. The description of inspection results should be extremely specific.
Home Safety AssessmentBy conducting a comprehensive analysis of the data obtained from the initial investigation, site inspection, testing, and calculations, the company determines the degree of danger or the level of damage to the building based on the current national codes and standards, such as the "Code for Seismic Evaluation of Civil Buildings" GB50292-2015 or the "Grade Standards for Building Condition" and relevant regulations.
