## 4 Results and Discussion
### Linear Static Finite Element Analysis Results
\begin{table}
\begin{tabular}{c c c c c} \hline \hline  & \multicolumn{4}{c}{**Secondary Girder (Sub-Grider)**} \\ \hline  & \multicolumn{2}{c}{**Transverse Bracing**} \\  & \multicolumn{2}{c}{**Top**} & \multicolumn{2}{c}{**Web**} & \multicolumn{2}{c}{**Bottom**} \\ \hline Size & 200 UB29.8 & 150 UB14.0 & 150 UB14.0 & 310 UB46.2 \\ Length (mm) & 5000 & 3000 & 5000 & 4070 \\
1.35G & 777, \(-\)244 & 197, \(-\)377 & 186, \(-\)405 & 615, \(-\)786 \\
1.2G + 1.5Q & 979, \(-\)244 & 199, \(-\)438 & 416, \(-\)411 & 1096, \(-\)1268 \\
1.2G + \(Q+W_{orth}\) & 890, \(-\)194 & 280, \(-\)449 & 412, \(-\)502 & 994, \(-\)1422 \\
1.2G + \(Q+W_{up}\) & 873, \(-\)179 & 276, \(-\)434 & 398, \(-\)475 & 962, \(-\)1214 \\
1.2G + \(Q+W_{down}\) & 943, \(-\)244 & 282, \(-\)451 & 417, \(-\)492 & 992, \(-\)1465 \\ \hline
**Maximum** & **979, \(-\)244** & **282, \(-\)451** & **417, \(-\)502** & **1096, \(-\)1465** \\
**Axial Capacity** & **1073, \(-\)1238** & **500, \(-\)577** & **500, \(-\)577** & **1666, \(-\)1764** \\
**Utilisation** & **0.91, 0.20** & **0.56, 0.78** & **0.83, 0.87** & **0.66, 0.83** \\ \hline \hline \end{tabular} Note: Compressive forces are shown as negative and tensile forces as positive.  
\end{table} 
Table 20: Analysis results of axial forces and member selection for secondary girder (sub-grider) transverse bracing component (kN). \begin{table}
\begin{tabular}{c c c c c} \hline \hline  & \multicolumn{4}{c}{**Primary Girder (Main Girder) Transverse Bracing**} \\ \hline  & \multicolumn{2}{c}{**Top**} & \multicolumn{2}{c}{**Web**} & \multicolumn{2}{c}{**Bottom**} \\ \hline Size & 460 UB82.1 & 180 UB18.1 & 200 UB29.8 \\ Length (mm) & 8000 & 7890 & 8000 \\ Axis & X & Y & X & Y \\
1.35G & 53 & 4 & 2 & 0 & 6 & 2 \\
1.2G + 1.5Q & 62 & 3 & 4 & 0 & 9 & 3 \\
1.2G + \(Q+W_{orth}\) & 58 & 3 & 4 & 0 & 7 & 3 \\
1.2G + \(Q+W_{up}\) & 69 & 12 & 5 & 4 & 7 & 4 \\
1.2G + \(Q+W_{down}\) & 67 & 12 & 5 & 5 & 7 & 4 \\ \hline
**Maximum** & **69** & **12** & **5** & **5** & **9** & **4** \\
**Flexural Capacity** & **164** & **72** & **9** & **6** & **26** & **17** \\
**Utilisation** & **0.42** & **0.17** & **0.58** & **0.82** & **0.35** & **0.23** \\ \hline \hline \end{tabular} Note: Bending moments are presented as absolute values.  
\end{table} 
Table 18: Analysis results of bending moments and member selection for primary girder (main girder) transverse bracing component (kNm). \begin{table}
\begin{tabular}{c c c c} \hline \hline  & \multicolumn{2}{c}{**Chord**} & \multicolumn{2}{c}{**Web**} \\  & \multicolumn{2}{c}{**Top**} & \multicolumn{2}{c}{**Bottom**} & \multicolumn{2}{c}{**Bracing**} & \multicolumn{2}{c}{**Vertical**} \\ \hline Size & 150 UB18.0 & 350 WC197 & 310 UC118 & 200 UC59.3 \\ Length (mm) & 5500 & 2750 & 4854 & 4000 \\
1.35G & 248, \(-\)90 & 1409, \(-\)3940 & 1790, \(-\)1746 & 460, \(-\)134 \\
1.2G + \(1.5Q\) & 556, \(-\)247 & 2824, \(-\)7796 & 3580, \(-\)2979 & 1828, \(-\)320 \\
1.2G + \(Q+W_{orth}\) & 478, \(-\)202 & 2467, \(-\)7046 & 2877, \(-\)2462 & 1417, \(-\)317 \\
1.2G + \(Q+W_{up}\) & 451, \(-\)202 & 2364, \(-\)6429 & 2853, \(-\)2442 & 1347, \(-\)305 \\
1.2G + \(Q+W_{down}\) & 487, \(-\)196 & 2507, \(-\)7396 & 2907, \(-\)2493 & 1489, \(-\)321 \\ \hline
**Maximum** & **556, \(-\)247** & **2824, \(-\)7796** & **3580, \(-\)2979** & **1828, \(-\)321** \\
**Axial Capacity** & **646, \(-\)745** & **7051, \(-\)8132** & **4214, \(-\)4590** & **2141, \(-\)2332** \\
**Utilisation** & **0.86, 0.33** & **0.40, 0.96** & **0.85, 0.65** & **0.85, 0.14** \\ \hline \hline \end{tabular} Note: Compressive forces are shown as negative and tensile forces as positive.  
\end{table} 
Table 19: Analysis results of axial forces and member selection for secondary girder (sub-grider) truss component (kN).