L12x12x1-3/8 — Dimensions and Section Properties

Dimensions and key properties

L12x12x1-3/8 drawn to the proportions tabulated below, with the axes at the centroid, x̄ = 3.5″ and ȳ = 3.5″. z is the principal axis of least radius of gyration, the one a compression check uses. The toe radii are not drawn.

Weight: = 105 lb/ft
A: = 31.1 in²
d: = 12 in
b: = 12 in
t: = 1.38 in
Ix: = 413 in⁴
Sx: = 48.6 in³
Zx: = 88.1 in³
rx: = 3.64 in
ry: = 3.64 in
rz: = 2.3 in

Section properties

Property	Value	Unit	Description
Weight	105	lb/ft	Nominal weight per foot
A	31.1	in²	Cross-sectional area
d	12	in	Long leg
b	12	in	Short leg
t	1.38	in	Leg thickness
Ix	413	in⁴	Moment of inertia, strong axis
Sx	48.6	in³	Elastic section modulus, strong axis
Zx	88.1	in³	Plastic section modulus, strong axis
rx	3.64	in	Radius of gyration, strong axis
Iy	413	in⁴	Moment of inertia, weak axis
Sy	48.6	in³	Elastic section modulus, weak axis
Zy	88.1	in³	Plastic section modulus, weak axis
ry	3.64	in	Radius of gyration, weak axis
Iz	165	in⁴	Moment of inertia, principal z axis
Sz	33.3	in³	Elastic section modulus, principal z axis
rz	2.3	in	Radius of gyration, principal z axis

Other sizes in the L12x12 series

All 4 L12x12 sizes L12x12x1-1/4 (lighter) →

Relevant tools

Steel Shape Properties Table
search and compare L12x12x1-3/8 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 angles

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