[TowerTalk] ROHN 65-G where do we get 200' of it.. + mating gin-pole ?

[jimlux]

> In looking through old Rohn catalog I have..... the "safe moment of restraint" is :
> 
> 45g-  9610  ft lbs     aprx $269.00  per 10' section
> 55g-  17,160  ft lbs  aprx $319.00  per  10' section
> 65g-  33,200 ft lbs   aprx $365.00  per  10' section 
> 
> Seems to me that's a huge diff, between  45 g and 55g... another huge diff, between 55g and 65g . 
>

The larger "diameter" (face width) accounts for most of the increased 
strength. A large thin walled tube is stronger in bending than a thinner 
solid bar with the same amount of metal.

The delta price is probably proportional to the change in amount of 
metal  (labor to assemble is about the same: same number of welds, etc.) 
(compare the weight of a section to the price)