Chapter B - Design Requirements

case1(b, t, E, F_y)

Classifies the section of a member subject to axial compression.

Description of applicable member: Flanges of rolled I-shaped sections, plates projecting from rolled I-shaped sections, outstanding legs of pairs of angles connected with continuous contact, flanges of channels, and flanges of tees.

Arguments

• b: width of the plate or half the width of the flange.
• t: thickness of the flange.
• E: elastic section modulous.
• F_y: yield strength of steel.

Returns

• CompressionBucklingType enum whose value is either Nonslender or Slender

Reference

• AISC Table B4.1a

case10(b, t, E, F_y)

Classifies the compressive elements of a member subject to flexural.

Description of applicable member: Flanges of rolled I-shaped sections, channels, and tees.

Arguments

• b: width of the plate or half the width of the flange.
• t: thickness of the flange.
• E: elastic section modulous.
• F_y: yield strength of steel.

Returns

• FlexureBucklingType enum whose value is either Compact, Noncompact, or Slender

Reference

• AISC Table B4.1b

case11(b, t, E, F_L, k_c)

Classifies the compressive elements of a member subject to flexural.

Description of applicable member: Flanges of built-up I-shaped sections (singly or doubly symmetric).

Arguments

• b: width of the plate or half the width of the flange.
• t: thickness of the flange.
• E: elastic section modulous.
• F_L: nominal compression flange stress above which the inelastic buckling limit states apply (ksi)
• k_c:

Returns

• FlexureBucklingType enum whose value is either Compact, Noncompact, or Slender

Reference

• AISC Table B4.1b

case12(b, t, E, F_L, k_c)

Classifies the compressive elements of a member subject to flexural.

Description of applicable member: Flanges of built-up I-shaped sections (singly or doubly symmetric).

Arguments

• b: width of the plate or half the width of the flange.
• t: thickness of the flange.
• E: elastic section modulous.
• E: elastic section modulous.
• F_y: yield strength of steel.

Returns

• FlexureBucklingType enum whose value is either Compact, Noncompact, or Slender

Reference

• AISC Table B4.1b

case13(b, t, E, F_y)

Classifies the compressive elements of a member subject to flexural.

Description of applicable member: Flanges of all I-shaped sections and channels bent about their minor axis.

Arguments

• b: width of the plate or half the width of the flange.
• t: thickness of the flange.
• E: elastic section modulous.
• F_y: yield strength of steel.

Returns

• FlexureBucklingType enum whose value is either Compact, Noncompact, or Slender

Reference

• AISC Table B4.1b

case14(d, t, E, F_y)

Classifies the compressive elements of a member subject to flexure.

Description of applicable member: Webs of doubly-symmetric I-shaped sections and channels.

Arguments

• d: depth of the WT section
• t_w: thickness of the web.
• E: elastic section modulous.
• F_y: yield strength of steel.

Returns

• FlexureBucklingType enum whose value is either Compact, Noncompact, or Slender

Reference

• AISC Table B4.1b

case15(b, t, E, F_y)

Classifies the compressive elements of a member subject to flexural.

Description of applicable member: Webs of doubly-symmetric I-shaped sections and channels.

Arguments

• h:
  • For rolled sections: the clear distance between flanges less the fillet at each flange.
  • For built-up sections: clear distance between flanges when welds are used.
• t_w: thickness of the web.
• E: elastic section modulous.
• F_y: yield strength of steel.

Returns

• FlexureBucklingType enum whose value is either Compact, Noncompact, or Slender

Reference

• AISC Table B4.1b