I'm working with the local telecom provider to get internet access to a remote property in California.
There is a 5' tall 8x8 pressure treated post with an electric meter and some other equipment mounted to it. Electric service runs underground from a utility pole about 30' away, which is on the property.
I'd like to put an ~18 foot tall mast on this post so that the telecom provider can do an aerial drop from the utility pole to the mast. One option seems to be 1-1/2" or 2" rigid metal conduit. One issue is I can only find it locally in 10' lengths, so I'd have to use a threaded coupling to go higher, which seems like a weak spot. Also, I'm not sure if such a tall mast is going to be rigid enough to support the aerial drop. Is there some better way to do this?