Depending on the material you would want at least 900 inch of thickness in that area.
H beam rods vs i beam rods.
H beam rods are more difficult to machine so they are often more expensive.
An h beam rod has two large flat sides that are perpendicular to the piston pin and crankshaft journal with a thin center.
This design makes these rods more rigid and able to handle compression forces.
Conversely h beam connecting rods are a little bit stiffer and rigid and that makes them ideal for higher horsepower higher torque applications where there is going to be more compressive forces again this comparison only holds true if your comparing rods with the same material finish and length.
Basically the h beam itself where the slot is cut out.
So performance i beam rods are typically made of a higher grade of steel 4340 or 300m and often have a thicker cross section in critical areas to increase strength.
With an h beam rod you should look at the thickness of the blades.
I beam or h beam.
H beam connecting rods have some additional things you want to look at before you pull the trigger on a set according to norris.
H beam connecting rods incorporate two large flat sides with a thin section in the middle.
However ive read that when a h beam distorts or bends it does so much slower and in a more controlled way than an i beam.