How close together can roosts be??

[Donkeygrl]

First coop build - I want to put two roosts in my coop -how close together can the two roosts be when running parallel and same height ? Also how close to the wall can the roosts be ?

 

[rosemarythyme]

12" from wall and 12" from roost to roost.

 

[aart]

I'd go 18" roost to roost.