Section Properties — Built-Up Section

1

Geometry

For each part: width b, height h and bottom-left corner coordinates (x, y); parts marked "hole" are subtracted

#	b	h	x (left)	y (bottom)	hole

Parallel-axis theorem: I_x = Σ(I_x,i + A_id_i²). Parts must not overlap (an overlapping area is counted twice). Suitable for plate girders, box sections and welded profiles.

2

Geometric properties

Area, centroid, moment of inertia, elastic section modulus, radius of gyration

3

Plastic modulus and torsion

Z_x, Z_y, shape factor, J

4

Principal axes

I_xy, θ, I₁, I₂