{"id":9266,"date":"2026-11-10T17:48:17","date_gmt":"2026-11-10T15:48:17","guid":{"rendered":"https:\/\/www.bunker-bssd.de\/2026\/11\/10\/bunker-door-armored-door-blast-door-which-door-protects-against-what\/"},"modified":"2026-11-11T17:09:54","modified_gmt":"2026-11-11T15:09:54","slug":"bunker-door-armored-door-blast-door-which-door-protects-against-what","status":"publish","type":"post","link":"https:\/\/www.bunker-bssd.de\/en\/2026\/11\/10\/bunker-door-armored-door-blast-door-which-door-protects-against-what\/","title":{"rendered":"Bunker Door, Armored Door, Blast Door: Which Door Protects Against What?"},"content":{"rendered":"

A shelter wall is made of reinforced concrete. The door interrupts this wall, and this is precisely where pressure, debris and hazardous substances reach it first. That is why there is no single type of bunker door. There are doors for the outer shell, emergency exits, airlocks and interior walls, each designed to withstand different loads.<\/p>\n

The terms bunker door, shelter door and armored door are often used interchangeably. They generally refer to a heavy steel door for a shelter. This article explains which door protects against what, where it belongs and what is involved in installing it.<\/p>\n

What does a bunker door need to protect against?<\/b><\/span><\/span><\/h2>\n

According to the German Federal Office of Civil Protection and Disaster Assistance (BBK)<\/a>, explosions pose major risks primarily due to blast waves, flying debris and fragments. Fire and, depending on the situation, hazardous substances are additional threats. An ordinary door cannot withstand any of these forces. A shelter door must be able to withstand them all simultaneously. <\/span><\/p>\n

Five examples:<\/span> <\/span><\/p>\n

A nearby explosion (blast wave).<\/b> For example, a gas accident or an impact in the street. The blast wave hits the door first. An armored door therefore opens outwards: the wave presses it more firmly into the frame instead of forcing it open. <\/span><\/p>\n

Debris and fragments.<\/b> For example, if the building above the shelter partially collapses. The solid steel door leaf withstands the impact. If debris blocks the exit, an optional self-release mechanism helps you open the door anyway. <\/span><\/p>\n

Fire and heat.<\/b> For example, a fire in the building above. The thick steel-and-concrete construction keeps the heat out. <\/span><\/p>\n

Vibrations and shocks.<\/b> For example, when the ground shakes after an impact. The lever locks are secured against accidental opening, even during pressure surges and ground shocks. <\/span><\/p>\n

Hazardous substances and radiation.<\/b> For example, in the event of a chemical accident or radioactive fallout. The rubber seal closes tightly all the way around. Combined with a filtered ventilation system that creates slight positive pressure inside the room, it keeps contaminated air out. You can find out how this works in the article Bunker Ventilation and Filtration.<\/a> The thick door also reduces radiation. <\/span><\/p>\n

What does \u201cbar\u201d mean for shelter doors?<\/span><\/b> <\/span><\/h2>\n

The bar is the unit used to measure the pressure of an explosion. The higher the figure, the more pressure the door can withstand.<\/p>\n

For example: At 1 bar, approximately 15 tonnes of force act on a door measuring 80 \u00d7 185 cm. That is equivalent to the weight of around ten cars. At 3 bar, the force is approximately 45 tonnes.<\/p>\n

When comparing doors, it is worth looking at how they were tested. Was the door tested with a brief blast or with sustained pressure? This makes a difference.<\/p>\n

What types of shelter doors are available?<\/h2>\n

We offer four types. The following explains what each one is designed for. You can find the weights and prices in the table below.<\/p>\n

Armored Door (PT)<\/span><\/span><\/span><\/h3>\n\t
\n\t\t\t\t\t\t\t\t
\n\t\t\t\"Panzert\u00fcr\"\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n