W10x33 — Dimensions, Weight & Section Properties
American wide-flange (W) beam per ASTM A6 / AISC Steel Construction Manual
W10x33 is an American wide-flange beam 9.73 inches (247.1 mm) deep with a 7.96 in (202.2 mm) flange, weighing 33 pounds per foot (49.1 kg/m) — that is what the "33" 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 | 9.73 in (247.1 mm) |
| Flange width bf | 7.96 in (202.2 mm) |
| Web thickness tw | 0.29 in (7.4 mm) |
| Flange thickness tf | 0.435 in (11 mm) |
Weight & Cross-Section
| Weight per foot | 33 lb/ft (49.1 kg/m) |
| 20 ft bar | 660 lb |
| 40 ft bar | 1,320 lb |
| Area A | 9.71 in² (62.6 cm²) |
Section Properties (strong / weak axis)
| Moment of inertia Ix | 171 in⁴ (7,118 cm⁴) |
| Section modulus Sx | 35 in³ (574 cm³) |
| Radius of gyration rx | 4.19 in |
| Moment of inertia Iy | 36.6 in⁴ (1,523 cm⁴) |
| Section modulus Sy | 9.2 in³ (151 cm³) |
| Radius of gyration ry | 1.94 in |
Compared with the neighbouring sizes
| Shape | d × bf (in) | lb/ft | Ix (in⁴) | Sx (in³) | Δ weight | Δ Ix |
|---|---|---|---|---|---|---|
| W10x30 | 10.5 × 5.81 | 30 | 170 | 32.4 | −9 % | −1 % |
| W10x33 (this page) | 9.73 × 7.96 | 33 | 171 | 35 | — | — |
| W10x39 | 9.92 × 7.99 | 39 | 209 | 42.1 | +18 % | +22 % |
Deflection example
A simply supported W10x33 spanning 16 ft with a 10 kip point load at midspan deflects 0.3 in (E = 29,000 ksi, Ix = 171 in⁴). The L/360 serviceability limit for this span is 0.53 in — the shape passes this quick check.
Calculate with your own span and load →
Frequently asked questions
How much does a W10x33 beam weigh?
W10x33 weighs 33 pounds per foot (49.1 kg/m). The number after the "x" in the designation is always the weight in lb/ft. A 20 ft bar weighs 660 lb and a 40 ft bar 1,320 lb.
What are the dimensions of a W10x33?
W10x33 is 9.73 in (247.1 mm) deep with a 7.96 in (202.2 mm) wide flange. The web is 0.29 in thick and the flanges are 0.44 in thick. Note the actual depth differs from the nominal W10 label — always design with the actual value.
What are the dimensions of a W10x33 in mm?
W10x33 is 247.1 mm deep with a 202.2 mm wide flange; the web is 7.4 mm and the flange 11 mm thick. In metric section properties: Ix = 7,118 cm⁴, Sx = 574 cm³.
How much does a W10x33 weigh in kg?
49.1 kg per meter. A 6 m bar weighs 295 kg and a 12 m bar 589 kg — handy when ordering US shapes from metric suppliers.
What is the moment of inertia of a W10x33?
About the strong axis, Ix = 171 in⁴ (7,118 cm⁴) with section modulus Sx = 35 in³. About the weak axis, Iy = 36.6 in⁴ and Sy = 9.2 in³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
W10x33 or W10x39 — what does one size up change?
W10x39 is about 18% heavier (39 vs 33 lb/ft) but about 22% stiffer (Ix 209 vs 171 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