For what little it is worth, my roosts are tree limbs and a 2x4 narrow side up.
Should i incorporate a poop board under roost?
Some people do, some don't. Wherever they go, chickens poop. There are a lot of different ways to manage poop. If your coop and run are big enough for your number of chickens small so poop doesn't build up, you usually don't have to do much. Most of us don't have that. You might need to clean regularly (some scoop poop daily or change out bedding regularly, some turn the coop and/or run into compost piles. Others do other things. There are a lot of things other than chicken density that comes into play.
Chickens also poop a lot on the roosts at night. Since they are not walking around the poop tends to build up under there. That's usually your biggest poop management issue. If they have a big enough coop and few enough chickens, some people rake that poop to mix it with the rest of the bedding in the coop or toss scratch under there so the chickens mix the poop when they are scratching for the scratch. These may need to change out coop bedding fairly often. Some people clean it out under the roosts, maybe with a shovel or fork, when they see a need.
A way to collect that poop can make poop management a lot easier. There are all kinds of different ways to collect that poop. Some people build trays and put sand, shavings, or PDZ in it so they can scoop the poop, often daily. Some put flat surfaces (maybe painted, covered with linoleum, or just plain wood) and scrape the poop off. I use bare wood. Some people scrape daily, I scrape a lot less often. We are all different with different circumstances. In one area I put plastic bins from
Walmart to catch that poop. I don't see anything wrong with putting down cardboard, old feed bags, whatever works for you.
What are you going to do with the poop or bedding when you remove it? My pure poop goes straight on my compost pile. When I clean out the entire coop (once every three or four years) I put that on my garden in the fall so it's ready for me to plant in he spring. Most clean their bedding out much more often, some weekly or monthly. We are all different.
There are lots of different ways to manage poop. I'm not saying mine is any better than anyone else's, it's just what works for me. Try something and see how it goes. You can always try something later if it doesn't work.