I love the idea of these deck catio spaces, What a good way to keep cats safe while giving them fresh air and sunshine. 

OK I want a Catio! They need to be made properly and strong so that Coyottes and other animals can't break into it or dig underneath it and the cats stay safe. Check out the plans Catio Spaces offers. https://catiospaces.com/catios-cat-enclosures/videos/deck-delight-catio/

From Her youtube channel Video.

Louie and Sampson, two Maine Coon rescues, enjoy fresh air while lounging in their garden catio and watching backyard activities. Their human mom enjoys the benefits of catios too. Life is good in a catio! Designed and built by Catio Spaces. www.CatioSpaces.com Catio Spaces designs and builds outdoor cat enclosures and offers a variety of DIY Catio Plans for cat owners who want to build their own catio. Founder Cynthia Chomos, a catio designer and general contractor, started Catio Spaces out of a desire to keep her cat safe, healthy and happy outdoors while protecting birds and wildlife.