replying to etpm , Joe Farmer wrote:
etpm wrote:

On Sun, 23 Mar 2014 16:19:03 +0000, Joe Farmer
Greetings Joe,
It depends on which way the 2 x 6 tubing is loaded. If the tubing is
loaded on the 2 inch wide direction it will be 27 times stiffer that
putting the load across the 6 inch dimension. Which way are you going
to use and how much deflection can you tolerate?
Eric
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I'm loading it on the 2" side . The number of arches can be decided when I
find out how much one will support. The building is an arch building 60' x
150' long. The arches are in a 60' span.


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