Table 5: Calculations for composite dead end ** cross arms.

Case Id * Setup Model Length L #
(mm) 		x
(mm) 		x1
(mm) 		PU
(kN) 		PALL
(kN) 		Deflection at Free End
Δ
(mm) 		Lateral Stiffness kL
(kN/m) 		Arm Weight W
(N) 		Strength-to-Stiffness Ratio
RSS
(1/mm) 		Weight-to-Stiffness Ratio
RWS
(1/mm) 		Cost
($)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13)
CD1 Fig. (3a) 1219.2 1066.8 152.4 35.58 21.57 103.5 1118.4 116 31.80 0.104 56
CD2 Fig. (3b) 1524.0 482.6 152.4 22.24 13.48 152.9 572.6 147 77.62 0.256 69
CD3 Fig. (3a) 1219.2 1066.8 152.4 44.48 26.96 176.0 821.7 120 54.10 0.147 56
CD4 Fig. (3b) 1524.0 482.6 152.4 26.69 16.17 249.8 420.7 151 126.80 0.358 69
CD5 Fig. (3c) 1828.8 965.2 152.4 18.68 11.32 258.9 351.7 165 106.2 0.467 84
CD6 Fig. (3a) 1219.2 1066.8 152.4 65.38 39.62 145.1 1465.3 142 44.70 0.096 79
CD7 Fig. (3b) 1524.0 482.6 152.4 44.48 26.96 233.5 750.2 186.8 118.49 0.249 92
CD8 Fig. (3c) 1828.8 965.2 152.4 31.1 18.9 349.6 434.2 214 143.3 0.490 118
Average 87.88 0.271

*CD1, CD2 Beam Series 2200 (Courtesy: Geotek, Inc.).
CD3, CD4 Beam Series 2000.
CD5 to CD8 Beam Series 2500.
** γ = 1.65 and ψ = 1.00.
# Corresponds to half the total length shown in setup.