Post or frame in concrete foundation?

[Manne N]

I am going to build a deck on sloping ground and think it would be smart to place the posts in the plinth. All the drawings I find have the frame mounted in the plinth.

Do you see any problems with mounting the post in the plinth?

 

[corre]

Which post, the railing post or a post for reaching between plinth and joist?
But generally speaking, it usually works fine. You have to consider the placement and that it's harder to get a taller post straight in a plinth than to level the joist and screw into the plinth. It's easy for it to lean slightly outward/inward; an angle error over 2m is more noticeable.

 

[Manne N]

The post should be at least three meters high because I am going to build a flat roof on the patio. I understand the problem with the angle errors. But it should be resolved by fastening the beams to the roof before inserting the second screw at the bottom in the plinth.

 

[corre]

Sure, you just need to be skilled with the level so it is plumb in both the x&y directions. Only one is adjustable via the post base, the other depends on how straight the plinth is.