W30x116 — Dimensions, Weight & Section Properties
American wide-flange (W) beam per ASTM A6 / AISC Steel Construction Manual
W30x116 is an American wide-flange beam 30 inches (762 mm) deep with a 10.5 in (266.7 mm) flange, weighing 116 pounds per foot (172.6 kg/m) — that is what the "116" 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 | 30 in (762 mm) |
| Flange width bf | 10.5 in (266.7 mm) |
| Web thickness tw | 0.565 in (14.4 mm) |
| Flange thickness tf | 0.85 in (21.6 mm) |
Weight & Cross-Section
| Weight per foot | 116 lb/ft (172.6 kg/m) |
| 20 ft bar | 2,320 lb |
| 40 ft bar | 4,640 lb |
| Area A | 34.2 in² (220.6 cm²) |
Section Properties (strong / weak axis)
| Moment of inertia Ix | 4,930 in⁴ (205,201 cm⁴) |
| Section modulus Sx | 329 in³ (5,391 cm³) |
| Radius of gyration rx | 12 in |
| Moment of inertia Iy | 164 in⁴ (6,826 cm⁴) |
| Section modulus Sy | 31.3 in³ (513 cm³) |
| Radius of gyration ry | 2.19 in |
Compared with the neighbouring sizes
| Shape | d × bf (in) | lb/ft | Ix (in⁴) | Sx (in³) | Δ weight | Δ Ix |
|---|---|---|---|---|---|---|
| W30x108 | 29.8 × 10.5 | 108 | 4,470 | 299 | −7 % | −9 % |
| W30x116 (this page) | 30 × 10.5 | 116 | 4,930 | 329 | — | — |
| W30x124 | 30.2 × 10.5 | 124 | 5,360 | 355 | +7 % | +9 % |
Deflection example
A simply supported W30x116 spanning 48 ft with a 10 kip point load at midspan deflects 0.28 in (E = 29,000 ksi, Ix = 4,930 in⁴). The L/360 serviceability limit for this span is 1.6 in — the shape passes this quick check.
Calculate with your own span and load →
Frequently asked questions
How much does a W30x116 beam weigh?
W30x116 weighs 116 pounds per foot (172.6 kg/m). The number after the "x" in the designation is always the weight in lb/ft. A 20 ft bar weighs 2,320 lb and a 40 ft bar 4,640 lb.
What are the dimensions of a W30x116?
W30x116 is 30 in (762 mm) deep with a 10.5 in (266.7 mm) wide flange. The web is 0.57 in thick and the flanges are 0.85 in thick. Note the actual depth differs from the nominal W30 label — always design with the actual value.
What are the dimensions of a W30x116 in mm?
W30x116 is 762 mm deep with a 266.7 mm wide flange; the web is 14.4 mm and the flange 21.6 mm thick. In metric section properties: Ix = 205,201 cm⁴, Sx = 5,391 cm³.
How much does a W30x116 weigh in kg?
172.6 kg per meter. A 6 m bar weighs 1,036 kg and a 12 m bar 2,072 kg — handy when ordering US shapes from metric suppliers.
What is the moment of inertia of a W30x116?
About the strong axis, Ix = 4,930 in⁴ (205,201 cm⁴) with section modulus Sx = 329 in³. About the weak axis, Iy = 164 in⁴ and Sy = 31.3 in³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
W30x116 or W30x124 — what does one size up change?
W30x124 is about 7% heavier (124 vs 116 lb/ft) but about 9% stiffer (Ix 5,360 vs 4,930 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