|
Hazelton, Kansas | Pokey,
Yep, I gave you the I value for the 8x12 on edge, which would be the strong way for a bridge beam.
If you lay the 8x12 flat, the I value becomes:
I = (12x8x8x8/12) - (11.25x7.25x7.25x7.25/12) = 155in^4
I've often thought there would be a market for a condensed version of a strength of materials textbook for farmers. I just dunno what parts to condense, and the liability behind such a book could be serious.
Mark's ME handbook, a Machinery's Handbook, or a Bosch Automotive Handbook might be a good investment. My favorite, in terms of packing an incredible amount of information into a small package, is the Bosch Handbook.
And..."I think I actually understand it somewhat" is about all I was ever able to achieve with my students in my former life. So don't feel bad. :-)
FWIW
MDS | |
|
Square vs. rectangle? Tube bridge physics.
