Rectangular

A solid rectangular cross-section.

🔧 Grasshopper component

RectangleCSAlpaca4d ▸ 01_Section

Inputs

SecNameSectionNameText(empty)Label for the section. Shown by Model View when section names are on.

WidthNumber0.30Width, along the local z axis, in m.

HeightNumber0.60Height, along the local y axis, in m.

MaterialMaterialA Uniaxial material.

ColourColour(empty)The colour the section is drawn in when Model View colours the elements by section.

Left empty, Model View gives each section a colour of its own. Display only: the analysis never reads it.

Outputs

SectionSectionBeam section, for a ForceBeamColumn.

📈 When to use it

Use it when

• The member is a rectangular concrete or timber beam or column.
• You want a simple placeholder while the model is taking shape.

Do not use it when

• The profile is a catalogue steel section → Steel Section Library.
• You need reinforcement resolved through the depth → Fiber Section.

🔗 Relation to OpenSees

section Elastic $secTag $E $A $Izz $Iyy $G $J $alphaY $alphaZ

A, Izz, Iyy, J, alphaY and alphaZ are computed from Width and Height; E and G come from the material.