1 The basis for preparation2 Aluminium truss parameters and arrangement3 Load value4 Load combination5 Calculation of 3m 450 x 450 aluminum alloy small truss 6 Calculation of horizontal positioning system of upper camera7 Calculation of 24m 450 x 450 aluminum alloy small truss 8 Calculation of 6m 450 x 710 aluminum alloy large truss 9 Calculation of electric ring hoist and upper anchoring point