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ClarifyComplete howthe areSection sectionscut cuts drawn in 3D viewView handledsection.
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ThisThe testprocess problemsfor demonstrates the use of drawing [section cuts drawn in|kb:Section cut] within the graphical user interface using a model shown in the figure below. The model is 1mdemonstrated long cantilever column with using a 1mcantilevered longframe horizontalsystem arm(Figure that1) supportswhich anotherhas 1m longsegments horizontalextending arm oriented in perpendicular direction to along the firstpositive arm.global TheZ firstaxis, arm is aligned with Global X direction and the second arm is aligned with Global Y direction. The column is fixed at the bottom and the end joint of the second arm is loaded by point forces then X, then Y. A point load of Fx = 1kN, Fy = 10 kN10kN, and Fz = 100 kN. The model 100kN is analyzedapplied and various section cuts are drawn using the "Draw > Draw Section Cut" menu command. This test problems provided a discussion of how the section cut forces are obtained and how they should be interpreted.

to the free end. After analysis is run, section cuts are drawn to obtain section-cut forces.

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!Cantilever_model_with_arms_and_section_cuts.png|align=center,border=0!

{center-text}Figure 1 - Caption{center-text}

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h1. Section Cutscut in 2D View

For section cuts drawn in a 2D viewView, the programsoftware internallyautomatically definesprojects the section cut by a quadrilateral cutting planes,plane asinto canthe bedepth shownof from the second figure belowdisplay. TheThis Zdepth coordinatesis inspecified thethrough quadrilateralOptions cutting> planeDimensions definitionand areTolerances determined> from the "2D View Cutting Planes \+/-". parameterRelevant thatparameters canare beshown setin via "Options > DimensionsFigures 2 and Tolerances" menu command.3:

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!Section_cut_drawn_in_2D_view.png|align=center,border=0!

{center-text}Figure 2 - Section cut in 2D View{center-text}

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!Section_cut_drawn_in_2D_view_-_saved_section_cut_data.png|align=center,border=0!

{center-text}Figure 3 - Section-cut data{center-text}


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h1. Section Cutscut in 3D View

For section cuts drawn in a 3D viewView, thereopen questions are thelisted followingas open questionsfollows:

* How is the section cut internally defined? Using groups or quadrilateral cutting planes?

* If quadrilateral cutting planes are used, how is the plane determined from the line representing the section cut? (The plane is not uniquely defined by the line that is drawn to represent the section cut.)

* Why can section cuts drawn in 3D viewviews cannotnot be saved?

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!Section_cut_drawn_in_3D_view.png|align=center,border=0!

{center-text}Figure 4 - Section cut in 3D View{center-text}
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h1. Attachments

* [SAP2000 V14.1.0 model |Section cuts drawn within the graphical user interface^SAP2000 V14.1.0 model.zip] (zipped .SDB file)

* [Section cuts defined by groups and cutting planes |Section cuts drawn within the graphical user interface^report - section cuts defined by groups and cutting planes.pdf] (.PDF)

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*TO DO:* clarify how section cuts drawn in 3D are used
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