First photo. The plywood wall extends down to the ground below the coop, this serves as a wind block under the coop, the girls really like hanging out under the coop and behind the wind block on windy days and seem to really like the shade it provides in summer. The pop hole and ramp are also behind the wind block so it prevents wind from blowing straight in the pop hole and prevents the chickens from being blasted when they decide to venture outside. The strap dangling on the right is attached through the wall of the coop to the ramp (which is also the door/covering to the pop hole) so I can easily raise/lower the ramp (open/close the door) from the outside of the coop. It hooks on a hook down below to hold the ramp shut. As a secondary lock on my door (I believe everything that opens/closes should have two locks in case one fails, you forget one, or a predator figures one out) a board can be slotted through the hole bottom right and it crosses over the outside of the ramp preventing it from dropping open.
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Second picture, you can see the ramp coming down, it would have been short and steep, so we added a 90 degree turn (that does not raise and lower), this part of the ramp is also behind the wind block. It doesn't have to make a turn, it could extend straight out, personal choice depending on space.
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Picture three is the hole in the floor. The hole is framed with 2x4s and when the ramp is closed it fully covers the hole and we chose to have it come flush with the 2x4s not flush with the inside floor of the coop. The ramp/door is actually bigger than the opening so when shut it extends at least an inch beyond all sides of the hole and there are no gaps. As previously mentioned, I do not have a lip to keep bedding in, but if you are doing deep litter or something this would be helpful. Additionally the roost is on the opposite side of the pop hole, so if a chicken is roosting it's not right above the hole and above a draft or pooping on birds going in and out.
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Last photo is from under the coop behind the ramp. You can see where the ramp attaches to the 2x4 that is framing the pop hole. It is hinged on the 2x4 at one end.
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