Topband: Tall vertical construction ideas?

[Björn Mohr]

Hi gang,

I am replacing my spiderbeam vertical with an aluminium vertical and  
are looking for information on the mechanical construction of a 18-24  
meter tall vertical. I am planning to buy aluminium in 6 meters  
lengths and need tips and ideas about pipe dimensions and construction  
practice for an antenna like this. Are there any good resources on the  
net to use for inspiration?

73 de Björn,
SM0MDG
SE0X