L8x4x7/8 — Dimensions and Section Properties

Dimensions and key properties

L8x4x7/8 drawn to the proportions tabulated below, with the axes at the centroid, x̄ = 1″ and ȳ = 2.99″. z is the principal axis of least radius of gyration, the one a compression check uses. The toe radii are not drawn.

Weight: = 33.1 lb/ft
A: = 9.79 in²
d: = 8 in
b: = 4 in
t: = 0.875 in
Ix: = 62.6 in⁴
Sx: = 12.5 in³
Zx: = 21.7 in³
rx: = 2.53 in
ry: = 1.04 in
rz: = 0.846 in

Section properties

Property	Value	Unit	Description
Weight	33.1	lb/ft	Nominal weight per foot
A	9.79	in²	Cross-sectional area
d	8	in	Long leg
b	4	in	Short leg
t	0.875	in	Leg thickness
Ix	62.6	in⁴	Moment of inertia, strong axis
Sx	12.5	in³	Elastic section modulus, strong axis
Zx	21.7	in³	Plastic section modulus, strong axis
rx	2.53	in	Radius of gyration, strong axis
Iy	10.5	in⁴	Moment of inertia, weak axis
Sy	3.51	in³	Elastic section modulus, weak axis
Zy	6.77	in³	Plastic section modulus, weak axis
ry	1.04	in	Radius of gyration, weak axis
Iz	6.97	in⁴	Moment of inertia, principal z axis
Sz	3.04	in³	Elastic section modulus, principal z axis
rz	0.846	in	Radius of gyration, principal z axis

Other sizes in the L8x4 series

← L8x4x1 (heavier)All 7 L8x4 sizes L8x4x3/4 (lighter) →

Relevant tools

Steel Shape Properties Table
search and compare L8x4x7/8 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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