4.16.2.1. Fiber Command

fiber(yloc, zloc, A, matTag)

This command allows the user to construct a single fiber and add it to the enclosing FiberSection or NDFiberSection.

yloc (float)	y coordinate of the fiber in the section (local coordinate system)
zloc (float)	z coordinate of the fiber in the section (local coordinate system)
A (float)	cross-sectional area of fiber
matTag (int)	material tag associated with this fiber (UniaxialMaterial tag for a FiberSection and NDMaterial tag for use in an NDFiberSection).