W18x119 — Dimensions, Weight & Section Properties
American wide-flange (W) beam per ASTM A6 / AISC Steel Construction Manual
W18x119 is an American wide-flange beam 19 inches (482.6 mm) deep with a 11.3 in (287 mm) flange, weighing 119 pounds per foot (177.1 kg/m) — that is what the "119" 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 | 19 in (482.6 mm) |
| Flange width bf | 11.3 in (287 mm) |
| Web thickness tw | 0.655 in (16.6 mm) |
| Flange thickness tf | 1.06 in (26.9 mm) |
Weight & Cross-Section
| Weight per foot | 119 lb/ft (177.1 kg/m) |
| 20 ft bar | 2,380 lb |
| 40 ft bar | 4,760 lb |
| Area A | 35.1 in² (226.5 cm²) |
Section Properties (strong / weak axis)
| Moment of inertia Ix | 2,190 in⁴ (91,154 cm⁴) |
| Section modulus Sx | 231 in³ (3,785 cm³) |
| Radius of gyration rx | 7.9 in |
| Moment of inertia Iy | 253 in⁴ (10,531 cm⁴) |
| Section modulus Sy | 44.9 in³ (736 cm³) |
| Radius of gyration ry | 2.69 in |
Compared with the neighbouring sizes
| Shape | d × bf (in) | lb/ft | Ix (in⁴) | Sx (in³) | Δ weight | Δ Ix |
|---|---|---|---|---|---|---|
| W18x106 | 18.7 × 11.2 | 106 | 1,910 | 204 | −11 % | −13 % |
| W18x119 (this page) | 19 × 11.3 | 119 | 2,190 | 231 | — | — |
| W18x130 | 19.3 × 11.2 | 130 | 2,460 | 256 | +9 % | +12 % |
Deflection example
A simply supported W18x119 spanning 30 ft with a 10 kip point load at midspan deflects 0.15 in (E = 29,000 ksi, Ix = 2,190 in⁴). The L/360 serviceability limit for this span is 1 in — the shape passes this quick check.
Calculate with your own span and load →
Frequently asked questions
How much does a W18x119 beam weigh?
W18x119 weighs 119 pounds per foot (177.1 kg/m). The number after the "x" in the designation is always the weight in lb/ft. A 20 ft bar weighs 2,380 lb and a 40 ft bar 4,760 lb.
What are the dimensions of a W18x119?
W18x119 is 19 in (482.6 mm) deep with a 11.3 in (287 mm) wide flange. The web is 0.66 in thick and the flanges are 1.06 in thick. Note the actual depth differs from the nominal W18 label — always design with the actual value.
What are the dimensions of a W18x119 in mm?
W18x119 is 482.6 mm deep with a 287 mm wide flange; the web is 16.6 mm and the flange 26.9 mm thick. In metric section properties: Ix = 91,154 cm⁴, Sx = 3,785 cm³.
How much does a W18x119 weigh in kg?
177.1 kg per meter. A 6 m bar weighs 1,063 kg and a 12 m bar 2,125 kg — handy when ordering US shapes from metric suppliers.
What is the moment of inertia of a W18x119?
About the strong axis, Ix = 2,190 in⁴ (91,154 cm⁴) with section modulus Sx = 231 in³. About the weak axis, Iy = 253 in⁴ and Sy = 44.9 in³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
W18x119 or W18x130 — what does one size up change?
W18x130 is about 9% heavier (130 vs 119 lb/ft) but about 12% stiffer (Ix 2,460 vs 2,190 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