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Bulb-girder cross sections, such as that shown in Figure 1, may be created using the [Section Designer|kb:Section Designer].

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!section dimensions.png|align=center,border=0!

{center-text}Figure 1 - Bulb-girder cross section{center-text}

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To model a bulb-girder section, first open the Section Designer, then [use polygons to draw|UsingCreate polygonalcustom shapessections toby createusing custompolygonal sectionsshapes] the outline of the section without the corner radius, as shown in Figure 2:

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!rectangular section.png|align=center,border=0!

{center-text}Figure 2 - Outline without the corner radius{center-text}

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Next, switch to reshape mode by selecting Draw > Reshape Mode. Click on the section, then right-click on each corner [joint|kb:Joint] to specify a radius where needed, as shown in Figure 3:

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!creating radial chamfers.png|align=center,border=0!

{center-text}Figure 3 - Caption{center-text}

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Figure 4 presents the final bulb-girder cross section. All corners other than those at the extreme fibers are properly [modeled|kb:Modeling techniques] with round corners.

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!final section.png|align=center,border=0!

{center-text}Figure 4 - Caption{center-text}


h1. Attachments

* [SAP2000 V14.2.0 model |Create bulb-girder sections with rounded corners^chamfered bulb tee section V14.2.0.zip] (zipped .SDB file)

{related-incident:no=24260|comment=Creating bulb girder sections with rounded corners}