Yes, They will be able to support the weight of the coop and not flex or bend.
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Hi and thank you for your suggestions. In looking at the all the other wichita coops they all used 2x4 for the roof rafters. I know 2x6 would be better. Hmmm. Are you saying this because I am building my wichita bigger than the standard wichita? I thought I read not to buy OSB for the sheathing because it breaks when you screw into it, not to mention expansion if it get wet. But then again I am a total newbie and have been reading so much I don't really know which way is up anymore.
Also on my roof I'm putting alot of rafters attached with rafter ties for the middle portion. On the outer "overhang" portion Im going to ladder frame it for more strength. The regular wichita does not have this but I planned on this because my wichita is bigger and I wanted the extra support for the roof.
The other thing is the roof will not be on 2x4's because once I put the hardware cloth on I will sister another 2x4 over the hardware cloth so essentially all my posts will be 4x4's. Do you still think the 2x6's are needed? If I did 2x6's for the rim of the roof I would then have to use 2x6 for all the rafters too right? And 2x6's to fill in the soffet etc etc etc right? I plan on doing this today hopefully and thank you again.
Please, Scott, no need to apologize. I have never built anything so this is trial by fire so to speak and I appreciate any advice from more knowledgeable folk. Thats a great firewood shed and I love your coop. I think Im going to regret not having a little room on the side for storage like you have (even though the geese have taken over) I do have a big shed about 20' away so Ill probably store my stuff there even though my DH has it pretty full of his yard stuff.Sorry I'm not familiar with the Wichita coop. I think I misread what you were doing. I thought your rafters were going to be 16' long so from the top of your slope to low side of slope was 16'. I was stating at that span I'd go 2x6. . your pics look more like 8' wide and 16' long. If that spans around 8'. Then 2x4 should work. I have a firewood shed it close to what your building I think . Its @8' x 16' with 2x4x10 for the rafters. Except these I milled and there true 2x4, 2x6 and 4x4. It has 1'2" ply on it. If You are not shingling the roof then you wont be able to seal off and trim the osb. so in that case I would not use it.
Anyways here is that shed and let me tell you with no walls the roof sways under my weight. It can be a little scary.
walls would help sturdy up this structure more. but for now its for drying firewood so I add small cross bracing at the 4x4 pole to the 2x6 horizontal roof support. 2x4 have a bird mouth cut in them to sit flush on 2x6.
sorry to confuse you.
Scott