W33x141 — Dimensions, Weight & Section Properties
American wide-flange (W) beam per ASTM A6 / AISC Steel Construction Manual
W33x141 is an American wide-flange beam 33.3 inches (845.8 mm) deep with a 11.5 in (292.1 mm) flange, weighing 141 pounds per foot (209.8 kg/m) — that is what the "141" 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 | 33.3 in (845.8 mm) |
| Flange width bf | 11.5 in (292.1 mm) |
| Web thickness tw | 0.605 in (15.4 mm) |
| Flange thickness tf | 0.96 in (24.4 mm) |
Weight & Cross-Section
| Weight per foot | 141 lb/ft (209.8 kg/m) |
| 20 ft bar | 2,820 lb |
| 40 ft bar | 5,640 lb |
| Area A | 41.5 in² (267.7 cm²) |
Section Properties (strong / weak axis)
| Moment of inertia Ix | 7,450 in⁴ (310,091 cm⁴) |
| Section modulus Sx | 448 in³ (7,341 cm³) |
| Radius of gyration rx | 13.4 in |
| Moment of inertia Iy | 246 in⁴ (10,239 cm⁴) |
| Section modulus Sy | 42.7 in³ (700 cm³) |
| Radius of gyration ry | 2.43 in |
Compared with the neighbouring sizes
| Shape | d × bf (in) | lb/ft | Ix (in⁴) | Sx (in³) | Δ weight | Δ Ix |
|---|---|---|---|---|---|---|
| W33x130 | 33.1 × 11.5 | 130 | 6,710 | 406 | −8 % | −10 % |
| W33x141 (this page) | 33.3 × 11.5 | 141 | 7,450 | 448 | — | — |
| W33x152 | 33.5 × 11.6 | 152 | 8,160 | 487 | +8 % | +10 % |
Deflection example
A simply supported W33x141 spanning 53 ft with a 10 kip point load at midspan deflects 0.25 in (E = 29,000 ksi, Ix = 7,450 in⁴). The L/360 serviceability limit for this span is 1.77 in — the shape passes this quick check.
Calculate with your own span and load →
Frequently asked questions
How much does a W33x141 beam weigh?
W33x141 weighs 141 pounds per foot (209.8 kg/m). The number after the "x" in the designation is always the weight in lb/ft. A 20 ft bar weighs 2,820 lb and a 40 ft bar 5,640 lb.
What are the dimensions of a W33x141?
W33x141 is 33.3 in (845.8 mm) deep with a 11.5 in (292.1 mm) wide flange. The web is 0.61 in thick and the flanges are 0.96 in thick. Note the actual depth differs from the nominal W33 label — always design with the actual value.
What are the dimensions of a W33x141 in mm?
W33x141 is 845.8 mm deep with a 292.1 mm wide flange; the web is 15.4 mm and the flange 24.4 mm thick. In metric section properties: Ix = 310,091 cm⁴, Sx = 7,341 cm³.
How much does a W33x141 weigh in kg?
209.8 kg per meter. A 6 m bar weighs 1,259 kg and a 12 m bar 2,518 kg — handy when ordering US shapes from metric suppliers.
What is the moment of inertia of a W33x141?
About the strong axis, Ix = 7,450 in⁴ (310,091 cm⁴) with section modulus Sx = 448 in³. About the weak axis, Iy = 246 in⁴ and Sy = 42.7 in³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
W33x141 or W33x152 — what does one size up change?
W33x152 is about 8% heavier (152 vs 141 lb/ft) but about 10% stiffer (Ix 8,160 vs 7,450 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