Reinforced concrete protective sealing door
overview

When selecting, not only should the size of the opening be met, but also the design pressure requirements should be met. Reinforced concrete doors have advantages such as low price and good early nuclear radiation resistance. But due to its large weight, it is generally used for personnel entrances and exits with relatively small dimensions.

1.1 Classification

1) The reinforced concrete protective sealing door adopts a flat opening design. Divided by the number of door panels, there are two types: single panel civil defense doors and double panel civil defense doors.

(1) Single doors are generally used for smaller personnel entrances and exits.

(2) Double doors are generally used for larger vehicle entrances and exits.

2) Reinforced concrete protective airtight doors are divided according to whether there is a threshold at the opening, and there are two types: fixed threshold and movable threshold.

The fixed threshold series of civil air defense doors has the advantages of reliable protection and low cost, but due to the 150mm high fixed threshold at the entrance, it is generally used for door openings where personnel do not enter and exit frequently (such as the door of the filter room).

The cost of the living threshold series civil air defense doors is slightly higher, and their thresholds are installed during wartime to meet corresponding protection, sealing, and other requirements; There is no threshold at the door opening during normal times, which facilitates the passage of personnel and vehicles and meets the requirements of fire evacuation. It is suitable for use in door openings where there are many people and vehicles entering and exiting during normal times.

1.2 Specifications are shown in Table 1.2-1.

Table 1.2-1 Specifications of Some Civil Air Defense Doors


Equipment name


Hole size (width x height) (mm)


Threshold condition


scope of application

Reinforced concrete single leaf protective closed door


700×1600 800×1800

800×2000 900×2000

1000××2000

1300××2000


There are thresholds in both peacetime and wartime


Suitable for entrances and exits with fewer people entering and exiting on a regular basis

Reinforced concrete single leaf movable threshold protective closed door


800×2000 900×2000

1000××2000

1300××2000


There is no threshold in peacetime, but there is a threshold in wartime


Suitable for personnel entrances and exits in both peacetime and wartime air defense basements

Reinforced concrete double leaf protective closed door


2000××2500

3000××2500


There are thresholds in both peacetime and wartime


Suitable for entrances and exits with fewer people and vehicles entering and exiting on a regular basis



1.4 The selection of protective equipment should be based on the protection requirements during wartime, as well as the usage requirements during wartime and peacetime. Standard series products approved by the national civil defense authority should be selected. The selection of protective equipment in the National Building Standard Design Atlas 07FJ01-03 "Design of Air Defense Basement Buildings" (2007 bound edition) is shown in Table 1.4-1.

Table 1.4-1 Atlas of Protective Equipment Selection


Equipment name


Atlas Number


Atlas Name

Reinforced concrete single leaf (fixed threshold) protective airtight door


07FJ03


Selection of Protective Equipment for Air Defense Basements

Reinforced concrete single leaf movable threshold protective closed door



Reinforced concrete double leaf (fixed threshold) protective airtight door