D1.L.1.1.6 Shear Stress
Allowable shear stress on the gross section [ref. XVII-2263.2 of NF-3000 1974] is calculated as
when h/b > 0.8
= 5.34 + 4.00/(a/h)2 when a/h > 1.0
For actual shear on the web, the gross section is taken as the product of the total depth and the web thickness. For shear on the flanges, the gross section is taken as the total flange areas.