L3-1/2x3x5/16 — Dimensions and Section Properties

Dimensions and key properties

L3-1/2x3x5/16 drawn to the proportions tabulated below, with the axes at the centroid, x̄ = 0.8″ 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: = 6.6 lb/ft
A: = 1.95 in²
d: = 3.5 in
b: = 3 in
t: = 0.313 in
Ix: = 2.33 in⁴
Sx: = 0.951 in³
Zx: = 1.72 in³
rx: = 1.09 in
ry: = 0.9 in
rz: = 0.624 in

Section properties

Property	Value	Unit	Description
Weight	6.6	lb/ft	Nominal weight per foot
A	1.95	in²	Cross-sectional area
d	3.5	in	Long leg
b	3	in	Short leg
t	0.313	in	Leg thickness
Ix	2.33	in⁴	Moment of inertia, strong axis
Sx	0.951	in³	Elastic section modulus, strong axis
Zx	1.72	in³	Plastic section modulus, strong axis
rx	1.09	in	Radius of gyration, strong axis
Iy	1.58	in⁴	Moment of inertia, weak axis
Sy	0.718	in³	Elastic section modulus, weak axis
Zy	1.28	in³	Plastic section modulus, weak axis
ry	0.9	in	Radius of gyration, weak axis
Iz	0.758	in⁴	Moment of inertia, principal z axis
Sz	0.602	in³	Elastic section modulus, principal z axis
rz	0.624	in	Radius of gyration, principal z axis

Other sizes in the L3-1/2x3 series

← L3-1/2x3x3/8 (heavier)All 5 L3-1/2x3 sizes L3-1/2x3x1/4 (lighter) →

Nearby angles at a similar d

L4x4x1/4d 4 in · 6.6 lb/ft
L4x3-1/2x1/4d 4 in · 6.2 lb/ft
L4x3x5/16d 4 in · 7.2 lb/ft
L3-1/2x2-1/2x5/16d 3.5 in · 6.1 lb/ft
L3-1/2x2-1/2x3/8d 3.5 in · 7.2 lb/ft
L3-1/2x3-1/2x5/16d 3.5 in · 7.2 lb/ft

Relevant tools

Open L3-1/2x3x5/16 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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