What are regulations on construction materials in Vietnam?
What are regulations on construction materials in Vietnam? Thank you!
Pursuant to Section 2.2 of the QCVN 06:2021/BXD (national technical regulations on fire safety for buldings and constructions) issued together with the Circular 02/2021/TT-BXD stipulating as follows:
2.2.1. With respect to fire safety, construction materials shall be characterized with only fire risks.
Fire risk of construction materials shall be determined based on: flammability, combustibility, ability to spread fire on the surface, and ability to produce smoke and toxic substances.
2.2.2. With respect to flammability, construction materials shall be classified as non-flammable construction materials and flammable construction materials. Flammable materials shall be divided into 4 categories:
- Ch1 (mildly flammable).
- Ch2 (moderately flammable).
- Ch3 (flammable).
- Ch4 (highly flammable).
Flammability and groups of construction materials classified according to flammability shall conform to B.2, Annex B.
With respect to non-flammable construction materials, fire risk and other properties are not required to be determined.
2.2.3. With respect to combustibility, flammable construction materials shall be classified into 3 categories:
- BC1 (hardly combustible).
- BC2 (moderately combustible).
- BC3 (combustible).
Groups of construction materials classified according to combustibility shall conform to B.3, Annex B.
2.2.4. With respect to surface fire spread, flammable construction materials shall be classified into 4 categories:
- LT1 (no spread).
- LT2 (weak spread).
- LT3 (moderate spread).
- LT4 (fast spread).
Groups of construction materials classified according to ability to spread fire on the surface are applied to surface materials of roofs, floors and flooring materials according to B.4, Annex B.
With respect to other construction materials, classifying in terms of ability to spread fire on surfaces is not required.
2.2.5. With respect to ability to produce smoke, flammable construction materials shall be classified into 3 categories:
- SK1 (low smoke production).
- SK2 (moderate smoke production).
- SK3 (high smoke production).
Groups of construction materials classified according to ability to produce smoke shall conform to B.5, Annex B.
2.2.6. With respect to toxicity of combustion products, flammable construction materials shall be classified into 4 categories:
- DT1 (low toxicity).
- DT2 (moderate toxicity).
- DT3 (high toxicity).
- DT4 (particularly high toxicity).
Groups of construction materials classified according to toxicity of combustion products shall conform to B.6, Annex B.
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