L3-1/2x3-1/2x1/2 — Dimensions and Section Properties

Dimensions and key properties

L3-1/2x3-1/2x1/2 drawn to the proportions tabulated below, with the axes at the centroid, x̄ = 1.05″ and ȳ = 1.05″. z is the principal axis of least radius of gyration, the one a compression check uses. The toe radii are not drawn.

Weight: = 11.1 lb/ft
A: = 3.25 in²
d: = 3.5 in
b: = 3.5 in
t: = 0.5 in
Ix: = 3.63 in⁴
Sx: = 1.48 in³
Zx: = 2.66 in³
rx: = 1.05 in
ry: = 1.05 in
rz: = 0.679 in

Section properties

Property	Value	Unit	Description
Weight	11.1	lb/ft	Nominal weight per foot
A	3.25	in²	Cross-sectional area
d	3.5	in	Long leg
b	3.5	in	Short leg
t	0.5	in	Leg thickness
Ix	3.63	in⁴	Moment of inertia, strong axis
Sx	1.48	in³	Elastic section modulus, strong axis
Zx	2.66	in³	Plastic section modulus, strong axis
rx	1.05	in	Radius of gyration, strong axis
Iy	3.63	in⁴	Moment of inertia, weak axis
Sy	1.48	in³	Elastic section modulus, weak axis
Zy	2.66	in³	Plastic section modulus, weak axis
ry	1.05	in	Radius of gyration, weak axis
Iz	1.51	in⁴	Moment of inertia, principal z axis
Sz	1.02	in³	Elastic section modulus, principal z axis
rz	0.679	in	Radius of gyration, principal z axis

Other sizes in the L3-1/2x3-1/2 series

All 5 L3-1/2x3-1/2 sizes L3-1/2x3-1/2x7/16 (lighter) →

Nearby angles at a similar d

L4x3x1/2d 4 in · 11.1 lb/ft
L4x4x7/16d 4 in · 11.3 lb/ft
L4x3-1/2x1/2d 4 in · 11.9 lb/ft
L3-1/2x3x1/2d 3.5 in · 10.2 lb/ft
L3-1/2x2-1/2x1/2d 3.5 in · 9.4 lb/ft
L3-1/2x3x7/16d 3.5 in · 9.1 lb/ft

Relevant tools

Open L3-1/2x3-1/2x1/2 in the Steel Shape Properties Table
the full table, filtered to this size, ready to compare against another
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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