Hi all,
I don't know the manufacturer as it is second hand and I can't see any maker's mark on it. The poles are 2.5inches (6cm) in diameter and measure 6.4m in length ie half the arch.
I was told the width would be 7m across but it would be longer than 30m given that there are 36 poles.
As I've not seen it up I can't be any clearer on the size.
If I can work out how to put pictures on this site I could upload some for you.