A perfect design drawing is meaningless if the manufacturing process at the factory and the erection process at the construction site do not comply with the technical requirements. How can you ensure that the components are manufactured to the correct dimensions? Are the welds strong enough? Is the protective coating thick enough?
All these questions are answered by the Standards for construction and acceptance of steel structuresThis article will focus on TCVN 170:2022, the latest technical standards, and other important regulations in the process.
1. TCVN 170:2022 – Core Standards on Construction (Execution)
TCVN 170:2022 (standard set replacing TCXDVN 170:2007) is a national standard set on "Construction of steel structures and aluminum structures". Specifically, TCVN 170-2:2022 is the most important part, regulating “Technical requirements for steel structures”.
- Scope of application: This standard provides technical requirements for the construction and manufacture of components from hot-rolled structural steel (strength up to S700), cold-formed steel, and the welding of reinforcing steel into steel structures.
- General technical requirements: The standard specifies requirements for:
- Material: All steel and welding materials must be inspected, graded, marked, straightened and cleaned of rust and grease before processing.
- Processing: Must comply with detailed drawings, priority given to mechanical methods.
- Assembly and connection: Regulations on tolerances, welding techniques, and bolt assembly.
2. TCVN 8790:2011 – Vital Standards for Protective Paints
An important part of construction and acceptance work is protecting the structure from corrosion. TCVN 8790:2011 The name "Steel structure protective paint - Construction and acceptance process" is a mandatory standard for this category.
This standard details three stages:
a. Surface Preparation
This is a key factor. The standard requires that the surface must be cleaned of rust, grease and dissolved salts (if any). The cleaning level must meet the requirements (e.g. level 2 according to TCXDVN 334:2005).
b. Paint application
Clearly specify construction conditions to ensure paint film quality:
- Weather: Do not paint when it is about to rain, humidity is not more than 85%, do not paint when there is strong wind.
- Method: Can be sprayed, rolled or brushed.
c. Inspection & Acceptance of paint layer
A structure is considered to meet the requirements for protective paint when it passes the following tests:
- External inspection: The paint film must be even, not peeling or wrinkled.
- Dry film thickness (DFT): Use a specialized measuring device to check and ensure the thickness is as designed.
- Adhesion: Test with a knife to ensure the paint adheres firmly to the steel surface.
3. Other Support Standards
Like the design standard, TCVN 170 also refers to a system of auxiliary standards for materials and connections, including:
- TCVN 1916:1995: Technical requirements for bolts and nuts.
- TCVN 3223:1994: Electric welding rod.
- TCVN 8789:2011: Standards on technical requirements of paint materials.
- TCVN 10307:2014: Although specialized in “Steel Bridge Structures”, this standard also provides very detailed general technical requirements for fabrication, assembly and acceptance, often used as a reference for heavy industrial steel structures.
Conclusion: “Acceptance” is not a job done at the end of the project, but a continuous quality control (QC) process at each stage. Strict compliance with TCVN 170:2022 and TCVN 8790:2011 from the factory to the construction site is Hai Long Construction’s commitment to ensure that the completed project has the highest quality, durability and safety, in accordance with the approved design drawings.
WHY SHOULD YOU CHOOSE HAI LONG CONSTRUCTION AS A STEEL STRUCTURE PRODUCTION AND INSTALLATION UNIT?
With over 26 years of experience in the field of manufacturing & assembling steel structures, Hai Long Steel Structure is proud to be Leading reputable unit, providing customers with complete construction solutions, meeting all needs and requirements.
- Team experienced engineers, architects and experts, knowledgeable about the design and construction of warehouse factories according to international standards.
- Diverse construction capacity, meeting all project sizes and requirements, from simple to complex factories.
- Possessing a system of modern machinery and equipment, with a capacity of nearly 50.000 tons/year, ensuring fast, accurate and safe construction.
- Professional construction process, is strictly managed.
You are looking for one Prestigious and professional steel structure manufacturing and erection unit? Please contact Hai Long Construction for free consultation and quote:
- HAI LONG CONSTRUCTION JOINT STOCK COMPANY – MEMBER OF TAIYO GROUP
- Address: Taiyo Building, 97 Bach Dang, Hong Bang Ward, Hai Phong City, Vietnam.
- Hotline: 084 6625 888
- Email: info@hailongjsc.vn
