mono_i_section

sectionproperties.pre.library.steel_sections.mono_i_section(d: float, b_t: float, b_b: float, t_ft: float, t_fb: float, t_w: float, r: float, n_r: int, material: Material = Material(name='default', elastic_modulus=1, poissons_ratio=0, yield_strength=1, density=1, color='w')) → Geometry

Constructs a monosymmetric I section.

Constructs a monosymmetric I section centered at (max(b_t, b_b)/2, d/2), with depth d, top flange width b_t, bottom flange width b_b, top flange thickness t_ft, top flange thickness t_fb, web thickness t_w, and root radius r, using n_r points to construct the root radius.

Parameters:

• d (float) – Depth of the I section

• b_t (float) – Top flange width

• b_b (float) – Bottom flange width

• t_ft (float) – Top flange thickness of the I section

• t_fb (float) – Bottom flange thickness of the I section

• t_w (float) – Web thickness of the I section

• r (float) – Root radius of the I section

• n_r (int) – Number of points discretising the root radius

• material (Material) – Material to associate with this geometry

Returns:

Monosymmetric I section geometry

Return type:

Geometry

Example

The following example creates a monosymmetric I section with a depth of 200 mm, a top flange width of 50 mm, a top flange thickness of 12 mm, a bottom flange width of 130 mm, a bottom flange thickness of 8 mm, a web thickness of 6 mm and a root radius of 8 mm, using 16 points to discretise the root radius:

from sectionproperties.pre.library import mono_i_section

mono_i_section(
    d=200, b_t=50, b_b=130, t_ft=12, t_fb=8, t_w=6, r=8, n_r=16
).plot_geometry()

(Source code, png, hires.png, pdf)

Monosymmetric I section geometry