A = Area
x = Distance from neutral axis to farthest fibre
I = Moment of Inertia
S = Section Modulus
r = Radius of gyration
The strut width has been deliberatelty increased to show the geometry.
The struts are built with the quad-edge passing through the profile center. The line which bisects the dihedral is coincident with the normal of the strut’s outer plane.
To account for hubs, you can specify the hub radius in the ‘Strut Options’ where you can also specify the strut ingress distance – i.e., what portion of the strut is clamped, fixed or inserted within the hub.