Hello Sir

I would like to pour concrete patio of 20' x 10' in my back yard. However, the backyard
is have slopes. i.e. From to the middle (approx. 8' a slope of 8" and from fence to same point is about 12' at drop of nearly 2'. So I construct a patio it will run over the drainage pipe. So to do that. Please suggest me?

Padmanabha Nauduri

Sounds as though you would be better off to build a deck.

Build a deck