# 4.15.2.1. 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).