2.2.3 Structure of constructions shall be designed in accordance with selected and applied standards in order to ensure durability corresponding to design lifespan of constructions and take into account the following factors:

- Use conditions by occupancies;

- Impact of surrounding environment;

- Properties of materials employed, solutions for protecting them from environmental impact and depreciation of materials.

2.3 Fire-related technical classification of buildings and structures

2.3.1 Fire-related technical classification of construction serves to establish fire safety requirements when designing and installing fire protection systems for constructions and depends on occupancy and fire risk level of constructions.

NOTE: Definitions relating to fire safety under 2.3 are specified in the QCVN 06:2022/BXD.

2.3.2 Fire-related technical classifications shall be implemented on the basis of:

a) Fire resistance category;

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c) Fire risk category by occupancy.

2.3.3 Fire resistance category of constructions shall consist of 5 categories of I, II, III, IV, and V; depend on number of storey (or fire service height of construction), fire risk category by occupancy, fire compartment area, and fire hazard of technology process within the constructions.

NOTE: In respect of apartment buildings taller than 75 m and public housing taller than 50 m, the QCVN 06:2022/BXD stipulates separate requirements regarding fire-resistance rating of elements and structures.

2.3.4 Fire risk levels of structural elements shall be divided into S0, S1, S2, and S3 depending on fire risks of the elements.

2.3.5 Constructions shall be classified into 5 fire risk categories by occupancy of F1, F2, F3, F4, and F5 depending on use characteristics and threat to human safety in case of fire, taking into account age, physicality, possibility of people sleeping, number of people using primary occupancy.

2.3.6 Fire resistance category, structural fire risk level, and fire risk category by occupancy of constructions shall be determined in accordance with the QCVN 06:2022/BXD.

3 ORGANIZING IMPLEMENTATION

3.1 Transition clauses

3.1.1 Investment construction projects that have been approved prior to effective date hereof shall conform to regulations applicable at the time of approval.

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3.1.3 In respect of fire safety, investment construction projects shall carry over in accordance with QCVN of 06:2022/BXD.

3.2 Local construction authorities are responsible for inspecting compliance with this Regulation in production, appraisal, approval, and management of building design and construction.

3.3 Ministry of Construction is responsible for publicizing and providing guidelines on application of this Regulation for relevant entities. Difficulties that arise during the implementation of this Regulation should be reported to the Science - Technology and Environment Department (Ministry of Construction).

APPENDIX A

CONSEQUENCE CLASSES OF BUILDINGS AND CONSTRUCTIONS

A.1 Constructions of consequence class C3

A.1.1 Assembly constructions

A.1.1.1 Airport terminals (primary terminals).

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A.1.1.3 Shopping malls, supermarkets, restaurants, and other similar assembly service and business establishments with multiple storeys and total floor area for business purposes exceeding 30 000 m².

A.1.1.4 Bleachers of stadiums or outdoor sport arenas (and roofs thereof, if any) with maximum capacity of exceeding 5 000 seats.

A.1.1.5 Sports stadiums with bleachers having total capacity of exceeding 5 000 seats.

A.1.1.6 Hospitals having at least 500 hospital beds.

A.1.2 Constructions potentially causing environmental contamination or economic losses in case of emergencies

A.1.2.1 Primary constructions in establishments for manufacturing, processing, using, storing, preserving, treating, disposing potentially leaking or detonating radioactive substances, explosive ordnances.

A.1.2.2 Primary constructions in establishments for manufacturing, processing, using, storing, preserving, treating, disposing potentially leaking or detonating dangerous, toxic chemicals.

A.1.2.3 Primary constructions in establishments such as: oil refineries, gas processing plants, gas supply stations (LPG, CNG, LNG), biofuel manufacturing plants, crude oil storage facilities, petroleum storage facilities, liquefied gas storage facilities, liquefied gas refilling stations, gas distribution facilities; gas and oil pipelines that can cause heavy casualties or high economic or environmental losses.

NOTE: LPG stands for Liquefied Petroleum Gas; CNG stands for Compressed Natural Gas; LNG stands for Liquefied Natural Gas.

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A.1.3 Constructions of socio-political importance

A.1.3.1 National Assembly House, Presidential Palace, headquarters of the Government, headquarters of the Central Communist Party.

A.1.3.2 National museums, libraries, galleries, exhibits.

A.1.4 Constructions with large structures

A.1.4.1 Building-type structures of a height exceeding 75 m.

NOTE: Height of building-type structures is calculated from ground elevation to the highest point of the constructions (including rooftop bulkhead, pitched roof if any; not including technical equipment such as antenna, lightning rod, solar power equipment, metal water tanks, etc. if any). In respect of constructions located on ground with varying ground elevations, the height shall be calculated from the lowest ground elevation.

A.1.4.2 Pillar, tower, mast structures of a height exceeding 75 m.

NOTE: Height of pillar, tower, mast structures shall be calculated from ground elevation or foundation elevation of the constructions, whichever is higher to the top of said structures (not including technical equipment on top of said structures). In respect of constructions located on ground with varying ground elevations, the height shall be calculated from the lowest ground elevation.

A.1.4.3 Tank, silo structures of a height exceeding 75 m or a storage capacity exceeding 15 000 m³.

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A.1.4.5 Underground structures in civil constructions and technical infrastructures in urban areas of a minimum depth of 18 m.

NOTE: Depth of underground structures shall be calculated from ground elevation to the lowest floor.

A.1.5 Other constructions according to decision of individuals deciding on investment and developers of construction projects

NOTE: Dams, walls, embankments, and pressurizing constructions of similar classifications according to other field-specific standards and regulations.

A.2 Constructions of consequence class C1

A.2.1 Single-storey single-family houses utilizing materials of low durability (slag bricks, slag lime, laterites, bamboo, leaves, and similar).

A.2.2 Single-storey buildings serving: temporary accommodation of humans, events, outdoor cultural and service activities of moderate and small scales; temporary processing and manufacturing; temporary storage facilities.

A.2.3 Mobile homes of container type or assembly homes for temporary purposes.

A.2.4 Guard posts, parking garages, tents, temporary fences.

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A.3 Constructions of consequence class C2

Constructions other than those of class C1 and class C3.