Not in the catalogue - enter it from the section tables. 0 ignores the root fillets (conservative: smaller plastic modulus).
Both beams are the same section; the two end plates are identical.
ArcelorMittal Orange Book.
The bottom of the plate mirrors the top (moment reversal); the bolts below the compression flange carry the vertical shear.
For butt-welded flanges the leg is used only in the compression dispersion (2s); 0 = none.