How do I determine the theoretical burst speed of a rotating disk, such as a flywheel? I went through my physics textbooks from 30 years ago with no luck. I googled, and found WAY too much information, but still no equation.
Is this similar to the formula for hoop stress in a pressure...
1400 LBS/IN^2 Sounds too low to be the modulus of rupture. It sounds more like ALLOWABLE STRESS.
Is the beam going to suffer a catastrophic structural failure, or fail by an unacceptable amount of deflection? e.g. L/360
Try the Forest Products Laboratory at [PLAIN]www.fpl.fs.fed.us[/url] or the Engineered wood Association at www.apawood.org
If you can quantify the modulus of rupture (maximum stress at the extreme fiber), and the section modulus, you can solve the FLEXURE FORMULA for the maximum moment...
tribdog,
Since a contractor is self-employed and not your employee, you may specify what you expect as an end-result, but not the method to be used to complete the work. That is, unless the method to be used is in the construction documents.
As the years pass, you will find that...
tribdog,
I suspect that you are about to find out why the "guy on the blade" is operating excavating equipment, and not operating surveying equipment. Don't expect too much out of these guys. Math flows out of the office, and into the ditch, not vice-versa. Cover your own rear end.
-Mike