On Aug 11, 7:29*am, Wood Guy wrote:
A friend wants to build a fence using round, 6" diam cedar posts and 1"
x 6" pine or spruce boards.

He wants to cut slots through the center of the posts (3 slots) that are
just large enough to slide the boards through. *There are going to be
lots of posts - maybe 100 or more.

How would you go about forming these slots? *What sort of tool?

Oh My! That is a LOT of fence.

Need a little more detail on how the fence is going to be built. It
almost sounds like the 1x6's are being put into the slotted holes. Is
this a solid panel privacy fence or a post and rail fence?

RonB

Ron