I am looking for advice on how to replace the floor of the covered porch on a cinderblock house. It is currently floored with painted plywood and I am unfamiliar with the way it is framed. I would like recommendations on what wood to replace it with and if the framing should be modified. Should I run another course of cinderblock or is the current design with a sill plate and joists fine? I have attached a couple of pictures that I hope will help explain. How do you recommend I fix this porch the right way? Thanks.