Remodeling fence Question

[Nack]

I currently have a chain link fence 5' h with 10' spacing on posts .....

I want to change to a 6' Dog Ear Privacy fence.

Roughly 400 " of fencing, 3-5 % downward slope with a long side roughly 210'..

So I will be stick building this one.

I live in North Carolina with hurricanes as a mild factor. I like the stronger side of building to "make sure" fence doesnt get wind blown.

I want to use PGT's to set my 2" x 4" X 6' frame on, attach 3 ea. 2" x 4" x 12' horizontally and then place the next section of 12' on or below the previous one set.

Should using 3 ea 12' be enough support / strength for the added distance of 10' or should I place another pole and make it 5' on center and shorten my frame boards?

Do the metal poles hold more strength over the time than the wood posts?

I would rather not replace the posts unless it was really needed.

Thank you,

Nack

[lefty]

Your plan for the wood framing is fine. I would add a post between the existing one to shorten the span of the rails. The wood rails will be the weak point -- not the posts.

[Nack]

What type of wood do you suggest? Moving from Colorado, cedar was a must - should I be concerned with pressure treating due to the humidity here?

And screws or nails?