Hi - I'll be bolting some angle iron to an I-beam and would like to use strong bolts. I'm somewhat familiar with various grades of bolts (5, 8, etc.) but don't know for sure what those grades mean. Does a higher grade simply mean the bolt is stronger?
Other than price, are there any disadvantages to a stronger bolt (for example, do they fatigue any differently, are they more brittle, etc.)?
Thanks for any help.