I have an I beam that is S type with tapering legs that is A36 steel.
The width is 3.5" and the height is 6". The web is .5" thick and the
ends of the legs start out at .25" thick and taper to .5" thick at the
web. I need the Moment of Inertia for this beam. I figured it using
Machinery's Handbook at I=26.49. I just want to make sure this is
correct. I also figured that with both ends of this beam simply
supported with a beam length of 38" and a single load point exactly in
the middle of the beam of 20 tons the Deflection at Load would be
3.42x10 to the fifth inches. That sounds a little low for that kind of
load. Can anyone help me out? Thanks, Steve