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Re: Commercial Sign stru

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Jim Warne wrote:

. > Why not just design a regular statically determinate frame - it doesn't 
. > have to be two dimensional -  and use statics and a calculator? Start 
. > with the loads at the source and follow them through to the foundation, 
. > resolving the components at each joint and making sure the sum of all 
. > forces and moments anywhere is zero.
. > 
. > Or don't they teach that anymore?

Apparently they don't!

It seems that they teach students to look for a computer program written by 
someone they don't know, who may or may not be an engineer, who may or may 
not be college educated, who may or may not have structural engineering 
experience, and use that program and take the results as gospel.

By the time they locate and obtain a program, they could have done the work 
by hand.

A. Roger Turk, P.E.(Structural)
Tucson, Arizona