Upon coming across a few bunkers I started wondering how they built them... As lucky as I was, I was recently gifted a handful of civil defense films, one of them featured the technical specifications of bunkers.
Though sadly the films aren't in the greatest condition, the start and end of this one is missing, as it crumbled to pieces.
Places where the protective buildings should be built
Shelters with industrial made equipment and fast set up shelters in zones at danger of complete destruction.
Shelters of fast set up style and anti-radiation shelters in zones of radioactive contamination.

Basic requirements for industrial bunkers
- Protective requirements: Must protect against all means of attack by enemy.
- Capacity: At minimum 150 people.
- Ability to support life: has ventilation, water supply, sewage, electricity and other systems to support life for a long period of time.

Construction types of shelters
- Left - shelter under a building.
- Right - shelter in a backyard.

Shelter under a college

Shelter under a supermarket

Shelter in a garage

Shelter in a mineshaft

Shelter in a metro

Plan of a bunker in a backyard

Types of construction styles for a bunker
- Top left - modular
- Top right - monolithic
- Bottom - semi monolithic

Technical solutions for a semi-monolithic bunker

Construction elements for a bunker in a backyard

Emergency exit

Construction of hermetic doors

Technical solutions for a hermetic feed-through

Ventilation schematic of a bunker

Air filtering systems

Protective systems in the ventilation system

Protective valve in the air vent

Small anti-blast air intake valve

Large anti-blast air intake valve

Construction of the air intake

Anti-dust filter based on an oily metal mesh

Overpressure valve

Adjustable air distribution pipe

Regeneration of air in the bunker

Schematic of the water supply system

Water storage tanks

An example of the sewage system

Examples of a sewage storage tank

Example of the electrical grid

Emergency electrical supply

Examples of connecting to a gas line

Basic devices
- Top left: chemical reconnaissance device.
- Top right: Moisture meter.
- Bottom left: radiation meter.

Firefighting and emergency tools

Inventory of a bunker

Fast set up shelters
- Built: In farms and villages and other places of non strategic importance, or as an addition to industrial shelters.
- Materials: Made from reinforced concrete, built by local people or construction companies.

Fast set up shelter from generic blocks of a water sewage

Fast set up shelter from generic reinforced concrete blocks

Fast set up shelter from pipe of 1,5-2,5m diameter

Fast set up shelter from large concrete plates

Air filter from sand or slag for fast set up shelters

Schematic of the air filtration system for fast set up shelters

Air ventilation with a bicycle

Centrifugal fan driven by a bicycle with a capacity of 200-300 m3/h

Anti-blast air intake

Protective doors with a locking mechanism

An example of seats and beds

Basic requirements and rules of a bunker or a shelter
- A shelter must be ready after hearing a signal "air raid".
- In protective buildings it is forbidden to smoke, make noise, light up candles or lights, take in unnecessary items or animals.
- The commander's tasks:
- After filling up the shelter must organize resting shifts for the people.
- After the nuclear blast must organize the inspection of the shelters condition and a short mission to gather intelligence of the surroundings.
- Must make sure the air ventilation systems and exits are working as intended.

And here the film ends, so that's that :)
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