since the chinese economic reform, china's housing construction industry has developed rapidly due to the development of social economy and the improvement of people's living standards. people put forward more new requirements for the quantity, quality and function of the buildings. on the one hand, various new materials and processes are emerging; on the other hand, while new constructions and technologies are constantly being developed, the housing construction industry is facing the challenge of how to maintain, reinforce and transform existing building structures.
the main reasons for identification and reinforcement of engineering structures include: natural disasters; changes in the use and function of houses; errors in design, construction and management; environmental erosion and damage accumulation ; and old houses reaching the design base period. whether it is to deal with the accident of new construction project, or to estimate if the used building has potential risk; whether it is the reinforcement that are required to withstand natural disasters, or the restoration which is essential after natural disasters; whether it is the modification of a building to meet new usage requirements, or the normal diagnosis and treatment of a building is going to reach the end of its natural age, all construction projects require detection and identification. it is necessary to detect and appraise the buildings, in order to make scientific evaluation of the structural reliability and implement accurate maintenance, transformation and reinforcement, so as to ensure the safety and normal use of the buildings.
noa, as a third party agency, conducts inspection and evaluation of the main structure of civil buildings, industrial buildings and public buildings. inspection and evaluation procedures help owners to determine whether their properties meet the standard of safety, applicability, durability and reliability. noa’s specialized services ensure that all buildings involved comply with relevant local health, safety and environmental regulations by testing of key building materials. our experts visit to assess the status of the building, facility or property, and provide owners with basic information about the target facility/property condition results. during our experts visit, list of defects/non-conformities, and rectification suggestions for found defects and non-conformities will be given to the client. our goal is to provide reliable technical support for the client's acquisition/lease/holding of the building.
noa provides supplier technical assessment services, including but not limited to:
1. main structure inspection
on-site engineering inspection of concrete structures and masonry structures, such as concrete strength test, floor core drilling test, column beam plate rebound test, steel bar scanning, reinforced steel plate physical and chemical analysis, noise test, etc.
2. steel structure inspection
including non-destructive testing of steel structures, coating testing, etc.
3. ground foundation inspection
including foundation pit deformation monitoring, settlement observation, crack measurement, pile foundation detection, foundation bearing capacity load test, etc.
4. other tests
including fire performance test of advertisement cloth, bolt performance testing, glass curtain wall three-property testing, etc.
in addition to testing methods, in order to ensure the reliability of building safety, it is crucial to arrange experts to conduct on-site inspections and professional safety reviews, discover hidden structural safety hazards, find weaknesses in safety management, and propose targeted suggestions and plans for improvement.
what are the standards for building safety inspections?
(1) industry-specific comprehensive standards and important industry-specific quality standards for engineering construction survey, planning, design, construction (including installation), and acceptance inspection;
(2) standards related to safety, sanitation and environmental protection specific to the engineering construction industry;
(3) important industry-specific terms, symbols, codes, quantities and units, and cartographic method standard
(4) standards for testing, inspection and evaluation methods for important industries in engineering construction;
(5) important industry-specific information technology standards for engineering construction;
(6) other engineering construction standards that the industry needs to control. standards other than mandatory standards are recommended standards.
what are the contents of the safety inspection and appraisal of the building main structure?
(1) structural system and its structural arrangement;
(2) structural units and their connection spots;
(3) structural defects, damage and corrosion;
(4) structural displacement and deformation;
(5) non-structural components that affect building safety.
what inspections are generally performed on reinforced concrete structural units and masonry structural units?
for reinforced concrete structural units and masonry structural units, the overall inclination, partial flashing, cracking, aging, structural connection damage, and the material and strength of structural members should be checked.
what inspections are generally performed on steel structural units and wood structural units?
for steel structural components and wood structural components, the material properties, components and joints, connection deformation, cracks, damages and defects should be checked, and the following parts should be checked for corrosion of steel or decay of wood and moth-eaten conditions:
(1) buried in the ground or submerged in water, near the ground or water surface;
(2) areas prone to accumulation of water or affected by water vapor;
(3) nodes and connecting units subject to alternating dry and wet;
(4) wet units that are prone to fouling and gaps where it is difficult to spray the coating;
(5) cable joints and anchor plugs.
tel： 86-400 821 5138
fax： 86-21 3327 5843
email：noa@noagroup.com
