Proctologically Violated©® wrote:
How did you determine what an "acceptable" deflection would be? Building
codes?


i personally use the moment and bending stresses , and a safety
factor of 3 to four , with 36000 psi being a standard for most beams you
dont want to get over 9 to 11 k in the bending and moments , you will
see deflections of less that 1/16 inch for a properly designed beam ,
while anything over 1/8 inch you will see the bending and moment
stresses edgeing up into unacceptable levels