Off the Grounders (Kennel)

I have had a 3 run set up on concrete for 6 years. 6' chainlink around treated lumber frame with the dog boxes about 18" off the ground on the outside of the back . It has worked fine. I wish I would have had the money to put in at least a drain trough, but you know.

I scoop it out and wash it out. This past Winter I just bedded the boxes deep with hay and had no problems during the 2 cold spells we had.

I am seriously planning a set of the wood floor kennels. I need 12 runs and I am thinking about building them with a walk way in the middle, door facing each other with a tin roof.

Still planning at this point.
I forgot to ask about this. What size are y'all's runs? The ones I have on concrete are 5' x 10'. And I double up my Britts with no problems. I am thinking using the same size for the new ones.