W24x117 — Dimensions, Weight & Section Properties
American wide-flange (W) beam per ASTM A6 / AISC Steel Construction Manual
W24x117 is an American wide-flange beam 24.3 inches (617.2 mm) deep with a 12.8 in (325.1 mm) flange, weighing 117 pounds per foot (174.1 kg/m) — that is what the "117" in the designation means. All values below are the standard AISC published section properties used in US structural design, with metric equivalents alongside.
Typical uses: floor and roof framing, columns, headers, and general steel construction. For a quick stiffness check, see the deflection example below or open the beam calculator with your own span and load.
Dimensions
| Depth d | 24.3 in (617.2 mm) |
| Flange width bf | 12.8 in (325.1 mm) |
| Web thickness tw | 0.55 in (14 mm) |
| Flange thickness tf | 0.85 in (21.6 mm) |
Weight & Cross-Section
| Weight per foot | 117 lb/ft (174.1 kg/m) |
| 20 ft bar | 2,340 lb |
| 40 ft bar | 4,680 lb |
| Area A | 34.4 in² (221.9 cm²) |
Section Properties (strong / weak axis)
| Moment of inertia Ix | 3,540 in⁴ (147,345 cm⁴) |
| Section modulus Sx | 291 in³ (4,769 cm³) |
| Radius of gyration rx | 10.1 in |
| Moment of inertia Iy | 297 in⁴ (12,362 cm⁴) |
| Section modulus Sy | 46.5 in³ (762 cm³) |
| Radius of gyration ry | 2.94 in |
Compared with the neighbouring sizes
| Shape | d × bf (in) | lb/ft | Ix (in⁴) | Sx (in³) | Δ weight | Δ Ix |
|---|---|---|---|---|---|---|
| W24x104 | 24.1 × 12.8 | 104 | 3,100 | 258 | −11 % | −12 % |
| W24x117 (this page) | 24.3 × 12.8 | 117 | 3,540 | 291 | — | — |
| W24x131 | 24.5 × 12.9 | 131 | 4,020 | 329 | +12 % | +14 % |
Deflection example
A simply supported W24x117 spanning 39 ft with a 10 kip point load at midspan deflects 0.21 in (E = 29,000 ksi, Ix = 3,540 in⁴). The L/360 serviceability limit for this span is 1.3 in — the shape passes this quick check.
Calculate with your own span and load →
Frequently asked questions
How much does a W24x117 beam weigh?
W24x117 weighs 117 pounds per foot (174.1 kg/m). The number after the "x" in the designation is always the weight in lb/ft. A 20 ft bar weighs 2,340 lb and a 40 ft bar 4,680 lb.
What are the dimensions of a W24x117?
W24x117 is 24.3 in (617.2 mm) deep with a 12.8 in (325.1 mm) wide flange. The web is 0.55 in thick and the flanges are 0.85 in thick. Note the actual depth differs from the nominal W24 label — always design with the actual value.
What are the dimensions of a W24x117 in mm?
W24x117 is 617.2 mm deep with a 325.1 mm wide flange; the web is 14 mm and the flange 21.6 mm thick. In metric section properties: Ix = 147,345 cm⁴, Sx = 4,769 cm³.
How much does a W24x117 weigh in kg?
174.1 kg per meter. A 6 m bar weighs 1,045 kg and a 12 m bar 2,089 kg — handy when ordering US shapes from metric suppliers.
What is the moment of inertia of a W24x117?
About the strong axis, Ix = 3,540 in⁴ (147,345 cm⁴) with section modulus Sx = 291 in³. About the weak axis, Iy = 297 in⁴ and Sy = 46.5 in³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
W24x117 or W24x131 — what does one size up change?
W24x131 is about 12% heavier (131 vs 117 lb/ft) but about 14% stiffer (Ix 4,020 vs 3,540 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