Need help collapsing a stadium (tension in crosswire supports)

[lking226]

Homework Statement

I need to find the force of tension in 5 pairs of cross wire supports (10 wires total) 15-25 feet off the ground that support an average high school football stadium.

Homework Equations

Sum of F = Ft + ?

The Attempt at a Solution

I don't even know where to start... =[

 

[pongo38]

Wind forces have something to do with it, but there are also indeterminate forces arising from construction itself whose requirements for robustness might be more demanding than the wind forces.