Calculations and solving other people's problems are my life. This is a rooftop A/C stand I designed yesterday. The normal type of AC stand wasn't quite strong enough for the expected wind load from a hurricane, and the contractor had no time to reconfigure everything--it had to be fixed ASAP! The eventual solution was adding an aluminum cross-brace to assist with the frame bending. This is why we need computers and widgets!!! Some of my calcs are below:
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@Muncledave arrived here from your tweet on October 16, 2009.
Trying to estimate the size of a beam to support a wood truss roof over a bank driveup for a new branch bank. Don't have time to ask the usual vendor for a quote. Would be nice if there was an online calculator that would allow a construction estimator to enter some simple known values, push a button, and voila, the result would be a best guess answer to at least, get close. Anyway, here is the link to web site that at least allows me to estimate how many tons of steel I'll need if I already know the size of the beams. http://www.efunda.com/math/areas/RolledSteelBeamsW.cfm
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