Coop layout questions/feedback request

[jwgreen]

Hi! I've been reading a bunch and we finally have started construction on our coop. The entire coop will be 12'x40', with the henhouse building 12'x12' and run 12'x28'. Wall height will be 9', give or take. We have the floor framing about done. I have some layout's drawn up in excel to get an idea on wall framing that I would appreciate any advise and feedback. I like the Carolina Coops designs, so doing something similar here. The current plan is to have an 8'x6' roosting area with storage underneath. I have the chicken door on the same side as the nest box. I've been reading about how high the roost bars should be. Scale on the grids is one square = 6", and each wall will lose some square footage for wall studs.

I plan on building the hen house first, then doing the run with a shorter wall height - maybe 7-8'.

We plan on deep litter method and starting with 6-8 chickens. Have no clue on breeds yet.

Questions -
1) I've read here and elsewhere about chickens roosting on rafter ties. There won't be any rafter ties over the roost area, but I'm concerned that with a 12' width in the run, I will need at least a few sets of rafter ties here and there. I do not plan on decking the roof, just a metal roof over rafters and purlins, with a ridge vent in the hen house. But I see Carolina Coops, and lots of others, that don't have rafter ties and have some pretty long runs. Plan on probably a 6/12 pitch for both.
2) I've read about ventilation, a lot, and the Carolina Coops typically have a window above the nesting box, which puts it at about the same height as the roosting bars. Not sure if that will be a bad thing - Central TX here and it's hot more than cold.
3) I have 2 feet between the roost bars and the roost bar closest to the chicken door at 2.5 feet. Is that enough space for them to get up and down?

Any other advice or suggestions for the design? Thank you all!

 

[ChaosMom]

2) I've read about ventilation, a lot, and the Carolina Coops typically have a window above the nesting box, which puts it at about the same height as the roosting bars. Not sure if that will be a bad thing - Central TX here and it's hot more than cold.

Just a quick comment on this from a noob who has probably spent way too much time researching: Think of two types of ventilation in areas with warm summers:

1) Year-round ventilation, above their heads when they are on the roost, that is never closed off. Up in the eaves, up in gable ends, etc. One square foot per bird of this permanent ventilation. This is to keep air and circulating, reducing ammonia, and moisture minimized, reducing chances of frostbite on winter nights.

2) Ventilation that can be opened and closed, including potentially at roost level for welcome breezes during miserable heat.

Chickens do NOT like drafts most times. My 12-week-old pullets have gone back in their coop in temps in the mid-70's when our very common brisk breezes literally ruffle their feathers. But when it's in the 80's (we're having a weird spring - 29 degrees forecast for Tuesday night), they love it.

I'm jealous of all your space! Good luck!