[TowerTalk] re installing my hdxmdpl72 question on rebar

[Bill NY9H]

  planning the rebar cage for the 72 footer,,,so I  downloaded from 
UST the california engineering drawing.

Went to acquire the rebar,,,  the spec calls for some # 4(1/2 ) 
ok  &     qty 8   # 9 (1 1/4")   wow.....
Nowhere can I find stuff that big....  the contactor supplier 
suggested that might be because of CA earthquakes,,,,&@$#@ ....

While I'm trying to follow the factory spec ,,,,is that way overkill....???
I plan on calling UST when CA awakes.

bill  / 3