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The Red Inverted Triangles/赤の逆三角計

During tours, I get interesting questions from tourists visiting Japan. Here are the answers to the questions that I got stumped by!


Q:What are those red inverted triangles on the windows of some buildings?

They signify that the windows are emergency entrances. Not for the residents or tenants to climb through, of course, but for fire fighters. In case of fire, they are permitted to break the window to deal with the fire. So, tenants have to keep obstacles clear from the window.

Q: Why are the triangles not on all windows?

The windows on the third floor and above and those below a height of 31 meters need to have the triangles. Why 31 meters? That is how high the ladder on the fire ladder truck can reach. Buildings that have emergency elevators, and other windows that firefighters can break don’t need the triangles on their windows.

The red inverted triangles on the windows

“The Red Inverted Triangles/赤の逆三角計” への2件のフィードバック

  1. Sarah より:

    Wow! I love this kind of information.

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