Requirements for width of fire passage: 1. The clear width and clearance height of the lane shall not be less than 4.0m; 2. The turning radius shall meet the requirements of fire truck turning; 3. There shall be no trees, overhead pipelines and other obstacles between the fire lane and the building that hinder the operation of the fire truck; 4. The outer wall of the edge building on the side of the fire lane close to the outer wall of the building shall not be less than 5m; 5. The gradient of fire lane shall not be greater than 3%.
 Legal basis: Article 8 of the Fire Control Law of the People's Republic of China, local people's governments at all levels shall incorporate the fire control planning including fire safety layout, fire stations, fire water supply, fire communication, fire truck access, fire equipment, etc. into the urban and rural planning, and be responsible for organizing the implementation. If the urban and rural fire safety layout does not meet the fire safety requirements, it shall be adjusted and improved; If the public fire control facilities and equipment are insufficient or do not meet the actual needs, they shall be added, rebuilt, allocated or technically reformed. Article 9 of the Fire Protection Law of the People's Republic of China, the fire protection design and construction of construction projects must conform to the national technical standards for fire protection of engineering construction. The construction, design, construction, project supervision and other units shall be responsible for the fire protection design and construction quality of the construction project according to law.