Is this allowed?

[Warior135]

Are you allowed to barricade a transparent (Glass material; You can shoot through it) door with breakable wooden props

[Adman]

From what you've described here I don't see the problem. You are barricading a prop with more props. People do that all the time. It's like barricading windows with bullet proof props to block out any nosy raiders. As long as neither of them is a door then I think it's fine.