I imagine you could make a splice by slipping a larger pipe over the two and putting in some bolts, but it probably wouldn’t be as strong as an unspliced pipe. I would suggest you contact the manufacturer and see what they recommend.
The auger and poles worked great, i was able to extend my dock in one day.
I found the ID to be a bit under 1-3/8". I had to grind them out a bit to get the Augers I had from Playstar to fit in the pipes
There is no easy way for me to measure this, since the pipes are installed in the dock. However, the pipes are significantly stronger and more rigid, and the walls appear to be thicker than regular galvanized pipes. You will not be disappointed about the sturdiness of these pipes.
You need to drill the pipe deep into the sand/rock to make the pipe sturdy so it does not move or swat. The soil type in your area will determine how deep you need to go.
Though I don’t know your building plans, I would say, yes it is possible. You may want to consider adding cross-braces to make the structure sturdy. Before buying bracing, you can first build the arbor, and then determine if additional bracing is needed.
We recommend this product for use with our Dock System.
This would definitely add strength to prevent the aluminum pole from flexing. If high winds bend this, the damaged flag pole will be the least of your worries.
The outside diameter is 1.66"
It is 1-3/4” dia.