Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems 2022
Inspecting and evaluating the safety of load-bearing structures of constructions and factories when installing additional solar power systems on the roof on individual works, factories, factories with a capacity not exceeding than 01MW, is guided with technical regulations, approved for quality management, ensures the safety of rooftop solar power projects during operation, exploitation and use. Safety assessment of load-bearing structures of works and workshops is an important basis for technical acceptance of occupational safety, safety of load-bearing structures, and safety of construction works, in order to adequately assess safe conditions for putting into operation, exploitation and use of works and workshops.
Important bases and regulations for safety assessment of load-bearing structures when installing more solar power systems on the roof:
- Pursuant to Section 6 of Official Letter No. 6242/BXD-KHCN Technical guidelines on construction safety when installing rooftop solar power: “Section 6: Assessment of load-bearing safety of roof structure and existing works: Based on the results of analysis of roof supporting structure as well as the connection between supporting structure system and existing roof, roof structure and building Existing constructions need to be surveyed and evaluated to ensure safety of bearing capacity as well as requirements for use when subjected to additional loads caused by solar power systems and supporting structures, in addition to the initial loads. of existing roof systems and constructions. It is necessary to check the bearing capacity of the roof and the structure under the effect of wind loads”
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- Pursuant to Clause b, Point 3.3 of Official Letter No. 3288/CP07-P4 Guiding the appraisal and approval of designs on fire prevention and fighting for solar power plants and rooftop solar power systems: “When installing solar panels and other equipment of the rooftop solar power system, the load affecting the roof structure must be calculated under normal conditions and under fire conditions”;
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- Pursuant to Clause 2 of Decree No. 06/2021/ND-CP detailing a number of contents on quality management, construction and maintenance of construction works: ‘’Construction inspection, testing of bearing capacity of work structures shall be carried out in the following cases:(b) When the work has been constructed, there are signs that the quality does not meet the requirements of the design or there are not enough grounds for quality assessment and acceptance; (d) At the request of competent authorities to inspect the pre-acceptance work as prescribed;’’
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- Pursuant to the Prime Minister’s Decision No. 13/2020/QD-TTg dated April 6, 2020 on the mechanism to encourage the development of solar power in Vietnam: Clause 4, Article 9 stipulates: “Organizations and individuals investing in the installation of rooftop solar power systems must ensure requirements on electrical safety, construction work safety, environment, fire prevention and fighting. under the current regulations”.
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WORKS: TRI THUC TRADE SERVICES AND PRODUCTION CO., LTD
ADDRESS: 99/E3, NGUYEN THI DINH, PHU THANH COMMUNE, BEN TRE CITY, BEN TRE PROVINCE
SCALE: ITEM 1 (1500M2, 270KWP CAPACITY), ITEM 2 (1300M2, 204KWP CAPACITY) 2022’s;
Photo: Overall inspection and assessment of safety of construction load-bearing structures – Item 1
Photo: Overall inspection and assessment of safety of load-bearing structures – Item 2
INSPECTION PURPOSE:
Determine the quality of the current state, check the difference between reality and design, calculate and check the bearing capacity to evaluate the safety of use of the building when renovating and installing solar panels. on the roof of the factory. Proposing reinforcement measures to ensure safe use (If any).
— CONTENTS AND METHODS OF IMPLEMENTATION —
Observation and inspection of the current state of the work: Determine the structural characteristics, the main load-bearing structure of the work. Investigate and identify defects and damage to the surface of building structures. Measure and draw the typical structure of the work, take pictures of defects and damaged locations. Implementation equipment: Steel ruler, laser distance meter, Flycam.
Photo: Check the typical connection structure, roof truss size – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems 
Photo: Check typical connection structure, roof purlin distance – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Photo: Check the typical connection structure, the span of the roof truss beams – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems 
Photo: Check the typical connection structure, roof purlin thickness – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Check structural geometry dimensions: Check the size of steel columns-concrete columns, check the size of steel beams, roof trusses, roof purlins. Implementation equipment: Steel ruler, caliper, Ultrasonic metal thickness machine.
Photo: Ultrasonic inspection of roof purlin cross section thickness – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Photo: Ultrasonic inspection of roof truss steel thickness – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Photo: Ultrasonic inspection of roof purlin cross section thickness – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Check bolt connection: Check the diameter, quantity, and tightness of the bolt connection between the column and the steel truss, between the steel frame and the foundation. Implementation equipment: caliper, force wrench, steel ruler.
Photo: Check the size, the number of connecting bolts – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Photo: Check the strength of tightening bolts connecting the foot of the column – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Photo: Check the strength of tightening bolts connecting the rafter beam and column head – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Concrete strength test: Test by surface hardness method (bouncing gun) – TCXD 162: 2004 Testing concrete strength. Execution device: Shotgun.
Photo: Test concrete strength with bouncing machine – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Photo: Test concrete strength with bouncing machine – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Check position, diameter of reinforcement, thickness of protective layer: Check by electromagnetic method to determine protective concrete layer, position and diameter of reinforcement – TCXD 240 : 2000. Implementation equipment: Machine elcometer.
Photo: Check diameter, position, quantity of reinforcement and concrete coating thickness – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Check strength, hardness of section steel: Check strength of section steel. Implementation equipment: Steel section hardness tester.
Photo: Column steel hardness test – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Photo: Checking the stiffness of roof beam beams – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Check the deflection of beams and roof trusses: Check the deflection of floor beams, steel beam frames, roof truss frames. Implementation equipment: Electronic total station leica.
Photo: Check the slope of the roof beams – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Photo: Check the slope of the roof beams – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Check column tilt and deviation: Check the column tilt and deviation, evaluate the coplanarity (in the same plane) of the columns. Implementation equipment: Electronic total station leica.
Photo: Check column deflection check – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Prepare quality inspection report: Actual condition of the project. Calculating and checking the bearing capacity, assessing the safety of the work when renovating and installing solar panels on the roof of the factory. Make a report on safety inspection of the structure of the building when installing solar batteries on the roof of the factory. Propose reinforcement measures or use plans to ensure safety (if any).
Photo: Make a report on safety inspection of the structure of the structure – Regulations on safety assessment of load-bearing structures and safety of construction works when installing rooftop solar power systems
Testing and assessing the safety of load-bearing structures of works and factories when installing more solar power systems on the roof is a job to ensure quality management requirements and construction safety requirements. , the workshop of this solar power system and give intervention measures, strengthen the structure, when the results of the inspection and assessment determine that the structure has not yet ensured the safety of bearing loads of construction works and factories.
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When your project shows signs of not meeting the quality requirements of the design or not having enough grounds to evaluate the quality, acceptance of the safe bearing capacity of the structure of the workshops, of the rooftop solar power system; Please contact us Vietsum Construction Consultancy and Quality Control Joint Stock Company (VCQC): for advice on solutions to assess the actual condition of the project, determine the cause, and determine the current quality of the project. construction structure in order to have accurate and conclusive assessments for your project and to use the project safely, safely and effectively operate the project.
Hotline: 090 959 8771 – Mr Nam
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