L4x3x3/8 — Dimensions and Section Properties

Dimensions and key properties

L4x3x3/8 drawn to the proportions tabulated below, with the axes at the centroid, x̄ = 0.78″ and ȳ = 1.27″. z is the principal axis of least radius of gyration, the one a compression check uses. The toe radii are not drawn.

Weight: = 8.5 lb/ft
A: = 2.49 in²
d: = 4 in
b: = 3 in
t: = 0.375 in
Ix: = 3.94 in⁴
Sx: = 1.44 in³
Zx: = 2.6 in³
rx: = 1.26 in
ry: = 0.873 in
rz: = 0.636 in

Section properties

Property	Value	Unit	Description
Weight	8.5	lb/ft	Nominal weight per foot
A	2.49	in²	Cross-sectional area
d	4	in	Long leg
b	3	in	Short leg
t	0.375	in	Leg thickness
Ix	3.94	in⁴	Moment of inertia, strong axis
Sx	1.44	in³	Elastic section modulus, strong axis
Zx	2.6	in³	Plastic section modulus, strong axis
rx	1.26	in	Radius of gyration, strong axis
Iy	1.89	in⁴	Moment of inertia, weak axis
Sy	0.851	in³	Elastic section modulus, weak axis
Zy	1.52	in³	Plastic section modulus, weak axis
ry	0.873	in	Radius of gyration, weak axis
Iz	1	in⁴	Moment of inertia, principal z axis
Sz	0.699	in³	Elastic section modulus, principal z axis
rz	0.636	in	Radius of gyration, principal z axis

Other sizes in the L4x3 series

← L4x3x1/2 (heavier)All 5 L4x3 sizes L4x3x5/16 (lighter) →

Relevant tools

Steel Shape Properties Table
search and compare L4x3x3/8 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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