Key Points - Intergraph Smart 3D - Help

Intergraph Smart 3D Molded Forms

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3D Design and Visualization
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Intergraph Smart 3D
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Help
Version_S3D
10.1(2014R1)

Profile cross-sections use a numbering system called key points. Members use an equivalent point system called cardinal points. The numbering convention for cardinal points differs from key points, as described below.

Key Point Numbering Conventions

Key points are numbered consistently among all types of profile cross-sections without regard to the number of geometric elements. This assures consistent behavior in the software when changing cross-sections of an existing profile system. As a result, some points are coincident on some cross-sections. Key point numbering is based on an I-beam profile because it is the most complex shape. Numbering for other profiles is derived from the I-beam.

I-beam

Includes rolled and built-up cross-sections.

S-beam

T

Includes T and I-to-T. Midpoint is from top of flange.

Fabricated T

Midpoint is from bottom of flange.

S-T

Midpoint is from top of flange.

Angle

Midpoint is from top of flange.

Fabricated angles

Midpoint is from top of flange.

Midpoint is from bottom of flange.

Channel

S-channel

Flat bar

Bulb

Pipe

Includes pipe, tube, and round bar.

Rectangular tube

Half-round

Cardinal Point Numbering Conventions

A cardinal point defines the location where the software displays a member cross-section. There are 15 cardinal points definable for a member cross-section symbol, but only one can be used at a time when the member is placed. Each cardinal point has a number and a name.

The local y-axis of the member and the center-of-gravity point of the section define load points 11 and 14. The local z-axis of the member and the center-of-gravity point of the section define load points 12 and 13. The location of points 10 (center-of-gravity) and 15 (shear center) depend on the section shape.

  1. Bottom Left

  2. Bottom Center

  3. Bottom Right

  4. Center Left

  5. Center

  6. Center Right

  7. Top Left

  8. Top Center

  9. Top Right

  10. Centroid

  11. Centroid Bottom

  12. Centroid Left

  13. Centroid Right

  14. Centroid Top

  15. Shear Center