L2.5x2.5x1/4 — Dimensions, Weight & Section Properties
Steel angle (L-shape) per ASTM A6 / AISC Steel Construction Manual
L2.5x2.5x1/4 is a hot-rolled steel angle with equal 2.5 in (63.5 mm) legs, 0.25 in thick, weighing 4.1 pounds per foot (6.1 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 | 2.5 in (63.5 mm) |
| Equal leg | 2.5 in (63.5 mm) |
| Thickness t | 0.25 in (6.4 mm) |
Weight & Cross-Section
| Weight per foot | 4.1 lb/ft (6.1 kg/m) |
| 20 ft bar | 82 lb |
| 40 ft bar | 164 lb |
| Area A | 1.19 in² (7.7 cm²) |
Section Properties (strong / weak axis)
| Moment of inertia Ix | 0.7 in⁴ (29 cm⁴) |
| Section modulus Sx | 0.39 in³ (6 cm³) |
| Radius of gyration rx | 0.77 in |
| Moment of inertia Iy | 0.7 in⁴ (29 cm⁴) |
| Section modulus Sy | 0.39 in³ (6 cm³) |
| Radius of gyration ry | 0.77 in |
Compared with the neighbouring sizes
| Shape | legs (in) | lb/ft | Ix (in⁴) | Sx (in³) | Δ weight | Δ Ix |
|---|---|---|---|---|---|---|
| L2.5x2.5x1/4 (this page) | 2.5 × 2.5 | 4.1 | 0.7 | 0.39 | — | — |
Deflection example
A simply supported L2.5x2.5x1/4 spanning 4 ft with a 10 kip point load at midspan deflects 1.13 in (E = 29,000 ksi, Ix = 0.7 in⁴). The L/360 serviceability limit for this span is 0.13 in — the shape does NOT pass this quick check.
Calculate with your own span and load →
Frequently asked questions
How much does a L2.5x2.5x1/4 angle weigh?
L2.5x2.5x1/4 weighs 4.1 pounds per foot (6.1 kg/m). A 20 ft bar weighs 82 lb and a 40 ft bar 164 lb.
What are the dimensions of a L2.5x2.5x1/4?
L2.5x2.5x1/4 has two equal 2.5 in (63.5 mm) legs, both 0.25 in thick. Angle legs are measured outside-to-outside, and both legs share the same thickness.
What are the dimensions of a L2.5x2.5x1/4 in mm?
L2.5x2.5x1/4 has two equal 63.5 mm legs, 6.4 mm thick. In metric section properties: Ix = 29 cm⁴, Sx = 6 cm³.
How much does a L2.5x2.5x1/4 weigh in kg?
6.1 kg per meter. A 6 m bar weighs 37 kg and a 12 m bar 73 kg — handy when ordering US shapes from metric suppliers.
What is the moment of inertia of a L2.5x2.5x1/4?
About the strong axis, Ix = 0.7 in⁴ (29 cm⁴) with section modulus Sx = 0.39 in³. About the weak axis, Iy = 0.7 in⁴ and Sy = 0.39 in³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
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