Most official rugby posts are made from rustproof aluminium posts. Hope this has helped answer your question =)
There are two uprights.
All rugby posts have a 3m cross bar and the posts are allowed to be as high as possible.
2p
normally steel
Wednesbury Rugby Football Club, Wednesbury, West Midlands, UK. Posts are 138.26ft tall.
I believe it is 13m high
rugby league goal posts are 10 or 15 metres high
16 metres
I don't know personally, but my school plays tag rugby and we have a rugby club, where we play touch rugby and some full contact.
Nothing they are exactly the same in every way.
Rugby field dimensions include the posts - 5.6 metres wide. The top edge of the cross bar is 3.0 metres from the ground. The minimum height of the posts is 3.4 metres.