Oh man...I hate it when chicken math leads to ACTUAL math.
OK, so, in my 20 x 8 coop, I have 30 nesting boxes mounted along 1 of the long walls, and they kick out about a foot from the wall. The first box pretty much touches the back wall, so I have maybe 3-4 feet of bare wall on that side at front (people door) side of the coop. I have a 4th 10-nesting box unit that I don't think I need for the # of birds the coop will hold (someone feel free to express another opinion if you disagree).
So, if I took 6 feet of depth from the other long side, that'd leave me about a 1 foot walkway between the roosts and nesting boxes to collect eggs. That's a little tight but potentially doable.
6 feet, with roosts every 18 inches, gives me room for 4 roosts (6 ft x 12 in = 72 in, 72 in / 18 in = 4).
4 roosts times say, 16 feet long gives me 64 feet of roost space. At one foot of roost space per chicken, that's....<scratches head> 64 chickens worth of space. With a more tight 10 inches of roost space per chicken, that's 76 chickens (64 feet x 12 inches/foot = 768 inches / 10 inches per chicken).
I could probably add a little more roost space (maybe one 4 ft roost) along the back wall connecting the roost structure to the nesting boxes. That's 80 chickens max.
Now, if I wanted to only use 5 feet of width for the roost setup, giving myself 2 feet of space in which to collect eggs...
5 feet, with roosts every 18 inches, gives me room for 3 roosts (5 ft x 12 in = 60 in, 60 in / 18 in = 3.33).
3 roosts by 16 feet each is 48 horizontal feet of roost space, plenty for 50 chickens. At 10 inches of roost space per bird, that's closer to 60 birds.
I'm planning on laying hybrids like Red Stars, so not particularly large birds.
First off....check my math. It's been a LONG time since I've been in school.
I'm leaning towards the second setup which is a bit fewer birds, but more space for birds and more room for me to work.
I was thinking 80 chickens when I bought this thing (it was advertised as able to hold 100, but I knew THAT was too many), but I'm thinking the 50 I mentioned starting with is probably about right.
Once mature and laying well, that could still be 3 dozen eggs a day, which is quite a few (21 a week, 80-85 a month, 1,000 a year) - obviously adjusted somewhat for molt, season changes in laying, etc.
#math