Join Date: Jul 2008
Location: Florida Panhandle
What species of wood are these fence posts? I am somewhat concerned about the top post upon which the swings hang. This is going to have to be a knot free, strong member.
As for joining, I would flatten the area where any posts are to be joined. I would then use carriage bolts to fasten them together. Again, this 4" round starting point bothers me. I am going two want to bolts at all stress points. I am not sure that there is room on 4" round stock to do this.