So I found this a nice model online which includes this piece:
The only method i found is either by making a lot of boolens but that ruins the topology most of the time, or by adding a lot of loop cuts and edge bridgeing between them, but that takes a lot of time. I am curios if there is another maybe easier and more time efficient way to do this. I cant upload the blend file because I am a new user. Thx!
Welcome!
One way to do it would be to first model this as a solid surface made out of triangles, then inset the triangles (the inset tool has an option to do each face individually). a little bit of adjustment will be needed after, as the bars between the triangles will be thicker than the ones on the edges.
A very smart approach thank you!
Make a cylinder, cut it in half. Select all faces, Triangulate (mesh menu). Add a Wireframe modifier, done.
Welcome 
…
Make a circle with 3 points, select the “top” point, set 3D cursor to selection, set pivot point to 3D cursor, select another point, duplicate, rotate edge by 60 degree, use Mesh → Merge by Distance, make faces, extrude top and bottom edge by 0.1, select triangles, inset individual by 0.1, select triangles, delete.
puuuhhh… brezzing in
Add a solidify modiffier wit 0.1, an array modifer with for example 24 , a simple deform modier set to bend 180 degree.
Get mad while finding the correct object/ rotation for the bending 
Add another array modifer…
…and noe “simply” apply the modifier and delete half of the triangles at the bottom and add some rectangles on the top…
Easy isn’t it ??? 
Hangar.blend (117.5 KB)
Thanks man this is really smart and helpful!
And a great answer!
