W18x192 — Dimensions, Weight & Section Properties
American wide-flange (W) beam per ASTM A6 / AISC Steel Construction Manual
W18x192 is an American wide-flange beam 20.4 inches (518.2 mm) deep with a 11.5 in (292.1 mm) flange, weighing 192 pounds per foot (285.7 kg/m) — that is what the "192" 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 | 20.4 in (518.2 mm) |
| Flange width bf | 11.5 in (292.1 mm) |
| Web thickness tw | 0.96 in (24.4 mm) |
| Flange thickness tf | 1.75 in (44.4 mm) |
Weight & Cross-Section
| Weight per foot | 192 lb/ft (285.7 kg/m) |
| 20 ft bar | 3,840 lb |
| 40 ft bar | 7,680 lb |
| Area A | 56.2 in² (362.6 cm²) |
Section Properties (strong / weak axis)
| Moment of inertia Ix | 3,870 in⁴ (161,081 cm⁴) |
| Section modulus Sx | 380 in³ (6,227 cm³) |
| Radius of gyration rx | 8.28 in |
| Moment of inertia Iy | 440 in⁴ (18,314 cm⁴) |
| Section modulus Sy | 76.8 in³ (1,259 cm³) |
| Radius of gyration ry | 2.79 in |
Compared with the neighbouring sizes
| Shape | d × bf (in) | lb/ft | Ix (in⁴) | Sx (in³) | Δ weight | Δ Ix |
|---|---|---|---|---|---|---|
| W18x175 | 20 × 11.4 | 175 | 3,450 | 344 | −9 % | −11 % |
| W18x192 (this page) | 20.4 × 11.5 | 192 | 3,870 | 380 | — | — |
| W18x211 | 20.7 × 11.6 | 211 | 4,330 | 419 | +10 % | +12 % |
Deflection example
A simply supported W18x192 spanning 33 ft with a 10 kip point load at midspan deflects 0.12 in (E = 29,000 ksi, Ix = 3,870 in⁴). The L/360 serviceability limit for this span is 1.1 in — the shape passes this quick check.
Calculate with your own span and load →
Frequently asked questions
How much does a W18x192 beam weigh?
W18x192 weighs 192 pounds per foot (285.7 kg/m). The number after the "x" in the designation is always the weight in lb/ft. A 20 ft bar weighs 3,840 lb and a 40 ft bar 7,680 lb.
What are the dimensions of a W18x192?
W18x192 is 20.4 in (518.2 mm) deep with a 11.5 in (292.1 mm) wide flange. The web is 0.96 in thick and the flanges are 1.75 in thick. Note the actual depth differs from the nominal W18 label — always design with the actual value.
What are the dimensions of a W18x192 in mm?
W18x192 is 518.2 mm deep with a 292.1 mm wide flange; the web is 24.4 mm and the flange 44.4 mm thick. In metric section properties: Ix = 161,081 cm⁴, Sx = 6,227 cm³.
How much does a W18x192 weigh in kg?
285.7 kg per meter. A 6 m bar weighs 1,714 kg and a 12 m bar 3,429 kg — handy when ordering US shapes from metric suppliers.
What is the moment of inertia of a W18x192?
About the strong axis, Ix = 3,870 in⁴ (161,081 cm⁴) with section modulus Sx = 380 in³. About the weak axis, Iy = 440 in⁴ and Sy = 76.8 in³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
W18x192 or W18x211 — what does one size up change?
W18x211 is about 10% heavier (211 vs 192 lb/ft) but about 12% stiffer (Ix 4,330 vs 3,870 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