Table 1: Material properties for composite cross arms [9].

Beam Series Ave. Bending Stress - Tangent
(MPa)
Ave. Bending Stress - Dead End
(MPa)
Ave. Modulus of Elasticity E
(GPa)
Section Dimensions
(mm x mm)
Wall Thickness *
(mm)
(1) (2) (3) (4) (5) (6)
2200 257.2 342.0 33.79 92.08 x 117.48 4.57, 5.08
2000 344.8 447.5 24.82 92.08 x 117.48 6.10, 6.86
2500 462.0 513.7 35.85 92.08 x 117.48 6.10, 6.86
3000 648.1 717.1 37.92 92.08 x 117.48 8.13, 8.89

* The two thickness values represent the thickness along long and short sides.