All YAGI elements can, and most are, center mounted on a conductive boom.

Reason: Voltage minimum.

You could use wood, but, man oh man, the problems that will surface
under weather condx.

wrote:

greetings,

can someone direct me on the ways driven element of a yagi is attached
to a boom. can a driven element (folded dipole or ordinary
dipole)electrically connected to a boom or not? what will be the
effect? or can i use wood as a boom? can someone also give me some
formula on yagi design (length, spacing etc)

help would be greatly appreciated.

thanks,

ian