Indicates the out-of-plane sustained stress index (Io) value.
Specify this value for any point in the piping system by selecting the SIFs & Tees check box on the Classic Piping Input dialog box. Type the node number to which the stress index applies. Then, specify the Out-Plane Index (io) value on the SIFs/Tees tab.
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For more information on stress intensification factors (SIFs), see Stress Intensification Factors and Stress Indices Details.
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For more information on using local coordinate systems to define in-plane and out-plane, see Tee Elements and Stress Intensification Factors (SIFs) in CAESAR II Local Coordinate Definitions.
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If you do not specify a value in the In-Plane Index (Ii) box, CAESAR II sets the value to the greater value of either 0.75 multiplied by the In-Plane SIF value (ii) or 1.0.