OptionalDescriptionOptionalGlobalExplicit GlobalId (22-char IFC GUID); generated when omitted.
Extrusion height along +Z (metres).
OptionalNameIfcRoot Name attribute (default 'Column').
OptionalObjectBase centre of the column, in storey-local coordinates (metres).
OptionalRefThe placement's RefDirection: where the section's local X (Width)
points, in storey-local coordinates. Must be horizontal; it is
normalised. Default [1, 0, 0]. Written explicitly either way, with
Axis [0, 0, 1], so the column can be turned later (rotateEntity
edits the RefDirection and refuses a placement without one).
OptionalTagProfile width along storey-local X (metres).
Profile depth along storey-local Y (metres).