MC18x58 — Dimensions and Section Properties

Dimensions and key properties

MC18x58 drawn to the proportions tabulated below, with the y axis at the centroid, x̄ = 0.86″ from the back. The inner flange faces are drawn at the standard 1:6 slope, which is not exact for every size. The flange toe radius is not drawn.

Weight: = 58 lb/ft
A: = 17.1 in²
d: = 18 in
bf: = 4.2 in
Ix: = 675 in⁴
Sx: = 75 in³
Zx: = 95.4 in³
rx: = 6.29 in
ry: = 1.02 in

Section properties

Property	Value	Unit	Description
Weight	58	lb/ft	Nominal weight per foot
A	17.1	in²	Cross-sectional area
d	18	in	Overall depth
bf	4.2	in	Flange width
tf	0.625	in	Flange thickness
tw	0.7	in	Web thickness
Ix	675	in⁴	Moment of inertia, strong axis
Sx	75	in³	Elastic section modulus, strong axis
Zx	95.4	in³	Plastic section modulus, strong axis
rx	6.29	in	Radius of gyration, strong axis
Iy	17.6	in⁴	Moment of inertia, weak axis
Sy	5.28	in³	Elastic section modulus, weak axis
Zy	10.7	in³	Plastic section modulus, weak axis
ry	1.02	in	Radius of gyration, weak axis

Other sizes in the MC18 series

All 4 MC18 sizes MC18x51.9 (lighter) →

Relevant tools

Steel Shape Properties Table
search and compare MC18x58 against other sections
Beam Shear, Moment and Deflection Diagram Calculator
find the moment this section has to carry, and how far it deflects under load
ASTM A36
the preferred grade for channels

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