What are the bars placed outside of windows called?


Apartments and buildings have bars placed on them outside of the windows and I
wanted to know what they are called. Thank you.




If you mean something like this, it's called
[手【て】すり](https://ja.wikipedia.org/wiki/%E6%89%8B%E6%91%BA) or specifically
窓手すり (for preventing an accidental fall):

[![enter image description
here](https://i.stack.imgur.com/oKRt5.png)](https://i.stack.imgur.com/oKRt5.png)

格子 looks like this (for preventing an escape or invasion):

[![enter image description
here](https://i.stack.imgur.com/OjO1W.png)](https://i.stack.imgur.com/OjO1W.png)




「格子{こうし}」 would be the generic word.

Use 「鉄格子{てつごうし}」 if they are made of iron.

Use 「アルミ格子{ごうし}」 if they are made of aluminum.

