L6x4x3/8 — Dimensions, Weight & Section Properties
Steel angle (L-shape) per ASTM A6 / AISC Steel Construction Manual
L6x4x3/8 is a hot-rolled steel angle with a 6 in (152.4 mm) long leg and a 4 in (101.6 mm) short leg, 0.375 in thick, weighing 12.3 pounds per foot (18.3 kg/m). All values below are the standard AISC published section properties, with metric equivalents alongside.
Typical uses: bracing, lintels, shelf supports, frames, and connection material. Angles are weak about their minor axis — long unbraced angles need lateral restraint. For a quick check, see the deflection example below or open the beam calculator.
Dimensions
| Long leg | 6 in (152.4 mm) |
| Short leg | 4 in (101.6 mm) |
| Thickness t | 0.375 in (9.5 mm) |
Weight & Cross-Section
| Weight per foot | 12.3 lb/ft (18.3 kg/m) |
| 20 ft bar | 246 lb |
| 40 ft bar | 492 lb |
| Area A | 3.61 in² (23.3 cm²) |
Section Properties (strong / weak axis)
| Moment of inertia Ix | 13.4 in⁴ (558 cm⁴) |
| Section modulus Sx | 3.3 in³ (54 cm³) |
| Radius of gyration rx | 1.93 in |
| Moment of inertia Iy | 4.86 in⁴ (202 cm⁴) |
| Section modulus Sy | 1.58 in³ (26 cm³) |
| Radius of gyration ry | 1.16 in |
Compared with the neighbouring sizes
| Shape | legs (in) | lb/ft | Ix (in⁴) | Sx (in³) | Δ weight | Δ Ix |
|---|---|---|---|---|---|---|
| L6x4x3/8 (this page) | 6 × 4 | 12.3 | 13.4 | 3.3 | — | — |
| L6x4x1/2 | 6 × 4 | 16.2 | 17.3 | 4.31 | +32 % | +29 % |
Deflection example
A simply supported L6x4x3/8 spanning 10 ft with a 10 kip point load at midspan deflects 0.93 in (E = 29,000 ksi, Ix = 13.4 in⁴). The L/360 serviceability limit for this span is 0.33 in — the shape does NOT pass this quick check.
Calculate with your own span and load →
Frequently asked questions
How much does a L6x4x3/8 angle weigh?
L6x4x3/8 weighs 12.3 pounds per foot (18.3 kg/m). A 20 ft bar weighs 246 lb and a 40 ft bar 492 lb.
What are the dimensions of a L6x4x3/8?
L6x4x3/8 has a 6 in long leg and a 4 in short leg, both 0.375 in thick. Angle legs are measured outside-to-outside, and both legs share the same thickness.
What are the dimensions of a L6x4x3/8 in mm?
L6x4x3/8 has a 152.4 mm long leg and a 101.6 mm short leg, 9.5 mm thick. In metric section properties: Ix = 558 cm⁴, Sx = 54 cm³.
How much does a L6x4x3/8 weigh in kg?
18.3 kg per meter. A 6 m bar weighs 110 kg and a 12 m bar 220 kg — handy when ordering US shapes from metric suppliers.
What is the moment of inertia of a L6x4x3/8?
About the strong axis, Ix = 13.4 in⁴ (558 cm⁴) with section modulus Sx = 3.3 in³. About the weak axis, Iy = 4.86 in⁴ and Sy = 1.58 in³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
L6x4x3/8 or L6x4x1/2 — what does one size up change?
L6x4x1/2 is about 32% heavier (16.2 vs 12.3 lb/ft) but about 29% stiffer (Ix 17.3 vs 13.4 in⁴). Going one step up within the same depth group is usually the cheapest way to cut deflection.
Values are entered from the governing standard’s published tables and cross-checked programmatically against its mass and section formulas before publication. Spotted an error? Write to advertising@metalabout.net — verified corrections ship within days. About