Helpful article! Perhaps splitting up the dual purpose section to Dual purpose-egg layers and a second group called Dual purpose-Meat would be helpful. That way, you can put the Rhode island red into dual purpose egg layers group for example.
Sadly this article used a web storage site for the images, which is gone now leaving blank pages. images should be uploaded to the BYC server.
The article does not have build details. There is a link to a photo album and the coop is very nice looking.