amanbh997/skills-architects/country-china

Country: People's Republic of China

Architectural code and regulatory reference for projects in mainland China. Hong Kong SAR has a distinct regulatory regime briefly summarised at Section 12 (different code system, English language, Common Law tradition). Macao SAR also distinct. Taiwan is not covered here.

Activate this skill on any Chinese city reference (Beijing, Shanghai, Guangzhou, Shenzhen, Chengdu, Chongqing, Hangzhou, Nanjing, Tianjin, Wuhan, Xi'an, Suzhou, etc.), CNY/RMB/Yuan currency, mention of "GB 50016"/"GB 50352"/"GB 50011"/"JGJ"/"DB11"/"DGJ08", or Chinese architectural terminology (容积率 yongji-lv, 建筑密度 jianzhu-midu, 日照 rizhao, 抗震 kangzhen, 防火 fanghuo).

1. Regulatory Hierarchy

China operates as Archetype D (Centralised National + Strong-Form Mandatory Clauses). National GB codes are mandatory throughout the country; local DB supplements may only be more stringent, never less.

1.1 Authority Stack

LEVEL 1 -- NATIONAL
  Ministry of Housing and Urban-Rural Development (MOHURD, Zhufang he Chengxiang Jianshe Bu)
    -- primary building authority
    + State Administration for Market Regulation (SAMR) -- approves standards
    + Standardization Administration of China (SAC) -- standards body
  Ministry of Emergency Management (MEM, Yingji Guanli Bu) -- fire approvals
    (transferred from Public Security Fire Department in 2018)
  Ministry of Ecology and Environment (MEE)
  National Energy Administration (NEA) -- energy policy
  Ministry of Industry and Information Technology (MIIT) -- industrial
  China Disabled Persons' Federation (Canlianhui) -- accessibility policy
 
LEVEL 2 -- PROVINCE (sheng) + AUTONOMOUS REGION + MUNICIPALITY DIRECTLY UNDER CENTRAL GOVT
  4 Municipalities: Beijing, Shanghai, Tianjin, Chongqing
  23 Provinces (Guangdong, Jiangsu, Zhejiang, Shandong, etc.)
  5 Autonomous Regions (Guangxi, Tibet, Inner Mongolia, Ningxia, Xinjiang)
  2 SARs (Hong Kong, Macao) -- own systems
    Each issues:
    DB Local Standards (e.g., DB11 Beijing, DGJ08 Shanghai, DBJ Guangxi 45, DB Guangdong 44, DB Zhejiang 33)
    Provincial Construction Department (Sheng Jianshe Ting)
    Provincial Fire Department (now Yingji Ting)
 
LEVEL 3 -- PREFECTURE / CITY
  Local Construction Bureau (Jianshe Ju)
  Planning Bureau (Guihua Ju, now usually merged with Natural Resources Bureau Ziyuan Ju)
  Emergency Management Bureau (Yingji Guanli Ju) -- former Fire Department
  Land + Resources Bureau (Guotu Ju, now Natural Resources Bureau)
  Environmental Protection Bureau (Huanbao Ju)
 
LEVEL 4 -- DISTRICT / COUNTY
  Smaller cities + counties -- delegated authority from prefecture
 
LEVEL 5 -- PROJECT
  Construction Engineering Planning Permit (Jianshe Gongcheng Guihua Xuke Zheng) from Planning
  Construction Permit (Shigong Xuke Zheng) from Construction Bureau
  Construction-Engineering Quality Supervision (Zhiliang Jiandu) from Construction Quality Office
  Fire approval (Xiaofang Shenpi) from Emergency Management Bureau
  Inspection by accredited testing institutes

1.2 GB Code Type Classification

Codes are classified by mandatory level:

• GB Mandatory (Qiangzhi Xing) -- printed in red -- legally binding, must comply; deviation requires special approval
• GB Recommended (Tuijian Xing) -- printed in black -- advisory; can be followed but not legally binding
• JGJ Industry Standards -- MOHURD industry standards, generally recommended but commonly adopted
• DB Local Standards -- provincial/municipal; may only be more stringent than national GB
• DBJ -- Local Building Standards (subset)

A single project must comply with the strictest applicable provision across these layers.

1.3 Construction Drawing Review (Shigong Tu Shencha)

Distinct Chinese process: before construction can begin, all construction drawings must be reviewed by an accredited Construction Drawing Review Institute (Shigong Tu Shencha Jigou) -- private body certified by provincial government. They check compliance with all applicable GB/DB codes. Review takes typically 15-30 days, longer for complex projects.

2. Building Code Core Requirements

2.1 GB 50352-2019 Civil Buildings Unified Design Standard

The "constitution" of Chinese building design. Replaces 2005 version. Defines:

• Civil Building (Minyong Jianzhu) Classification:
• Residential (Juzhu Jianzhu)
• Public Building (Gonggong Jianzhu) -- offices, commercial, hotels, hospitals, schools, etc.
• Building Heights:
• Low-rise residential: 1-3 storeys
• Multi-storey residential: 4-6 storeys
• Mid-rise residential: 7-9 storeys
• High-rise residential: ≥10 storeys OR ≥28 m
• High-rise public building: > 24 m
• Super-high-rise: > 100 m

2.2 GB 50352 General Provisions

• Floor-to-floor height: residential 2.8-3.0 m; office 3.6-4.5 m; hospital 4.0-4.5 m; commercial 4.5+ m
• Net ceiling height (Jingkong Gao): residential 2.4 m min; corridor 2.1 m min
• Stair: width 1.10 m residential, 1.20 m public; max riser 0.18 m, min going 0.26 m
• Door clear width: 800 mm general, 1000 mm main entrance public
• Setback to road red line: per municipal Detailed Regulation Plan
• Setback to property line: per municipal regulation; typically 3-12 m

2.3 Yongji-lv (容积率) -- FAR Equivalent

• Yongji-lv = total above-grade GFA / lot area
• Jianzhu Midu (建筑密度) = building footprint / lot area (similar to coverage)
• Both controlled by Konngzhi Xing Xiangxi Guihua (Detailed Regulation Plan) for each plot
• Typical residential yongji-lv: 1.0-3.5; commercial 4.0-8.0; CBD towers higher

2.4 Sunlight Rights (Rizhao Quan, 日照权)

Distinctive Chinese regulation: every residential dwelling must receive a specified number of hours of unobstructed sunlight on the worst day of winter (大寒 Da Han, around 20 January), measured at the lowest occupied window. Targets:

This drives Chinese urban form: long parallel slab blocks (north-south or oriented), substantial spacing between blocks, distinct from Western tower-on-podium. Calculation per GB 50180-2018 + local rules.

2.5 Setbacks Between Buildings (Jianzhu Jianju, 建筑间距)

• For residential blocks, minimum distance between facing facades = function(building height + use + sunlight ratio).
• Common rule of thumb: distance = 1.0 - 1.3 × north building height in Cold zone (more for higher latitude)
• Local DB specifies exact formula

2.6 Height & Use Classification (GB 50352 + GB 50016)

3. Fire Safety (GB 50016 + GB 51251)

3.1 GB 50016-2014 (2018 Edition) -- "Code for Fire Protection Design of Buildings"

The single most-cited code on Chinese projects. Major 2018 amendment post the SCMP-reported high-rise fires. Replaces older legacy codes including GB 50045-95 (high-rise specific).

Structure:

• Ch. 1 General
• Ch. 2 Terminology
• Ch. 3 Production + Storage Buildings (industrial)
• Ch. 4 Hazardous Materials Storage + Use
• Ch. 5 Civil Buildings -- the most-used chapter; fire-resistance, compartmentation, egress for all civil buildings
• Ch. 6 Building Construction (combustibility, materials)
• Ch. 7 Building Equipment
• Ch. 8 Active Fire Protection Systems
• Ch. 9 Heating, Ventilation, Air Conditioning
• Ch. 10 Electrical
• Ch. 11 Wood-Frame Buildings
• Ch. 12 Existing Buildings
• Annexes A-F

3.2 Civil Building Classification by Fire Hazard (GB 50016 Ch. 5)

3.3 Fire-Resistance Class (Naohuo Dengji)

High-rise (Class I + II) must be at least First Class. Residential mid-rise often Second Class.

3.4 Egress (GB 50016-2014 Ch. 5)

3.5 Sprinklers (GB 50084-2017)

• Mandatory for high-rise residential ≥ 54 m (or 100 m per latest amendment)
• Mandatory for high-rise public buildings ≥ 24 m
• Mandatory for hospitals, hotels, schools above certain scales
• Mandatory for underground spaces

3.6 Smoke Control (GB 51251-2017)

Dedicated code for smoke control + smoke prevention. Required for:

• Atriums
• Underground spaces
• Long corridors > 20 m without natural ventilation
• All compartment areas > 100 m2 without natural ventilation

Specifies mechanical extract rates, makeup air, pressurization, smoke barriers, dampers.

3.7 External Cladding (GB 50016-2014 Section 5.5)

Post-2010s fires (multiple in Shanghai, Urumqi, Shenyang):

• High-rise residential ≥ 50 m: cladding must be Class A non-combustible (GB 8624-2012)
• High-rise public buildings: same
• Non-high-rise but ≥ 24 m: Class B1 acceptable but increasingly Class A preferred
• Insulation behind cladding: separate fire-rating; Class A non-combustible required in most high-rise

3.8 Refuge Floors (Bi Nan Ceng)

For super-high-rise:

• Public buildings > 100 m: refuge floor every 15 storeys (or 50 m vertical interval)
• Residential > 100 m: refuge floor every 15 storeys
• Refuge floor: not used for occupancy; sized for evacuation capacity; ventilated to outside; protected fire doors

4. Energy Code

4.1 GB 55015-2021 -- General Code for Building Energy + Renewable Energy

Highest-level energy code, replacing fragments of older codes. Applies to all civil buildings nationally. Co-exists with detailed prescriptive codes below.

4.2 GB 50189-2015 -- Public Buildings Energy Conservation

Detailed prescriptive code for offices, hotels, hospitals, large commercial. Sets envelope U-values + HVAC efficiency + lighting power density by climate zone.

4.3 Residential Energy by Zone