W12x96 — Dimensions, Weight & Section Properties
American wide-flange (W) beam per ASTM A6 / AISC Steel Construction Manual
W12x96 is an American wide-flange beam 12.7 inches (322.6 mm) deep with a 12.2 in (309.9 mm) flange, weighing 96 pounds per foot (142.9 kg/m) — that is what the "96" 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 | 12.7 in (322.6 mm) |
| Flange width bf | 12.2 in (309.9 mm) |
| Web thickness tw | 0.55 in (14 mm) |
| Flange thickness tf | 0.9 in (22.9 mm) |
Weight & Cross-Section
| Weight per foot | 96 lb/ft (142.9 kg/m) |
| 20 ft bar | 1,920 lb |
| 40 ft bar | 3,840 lb |
| Area A | 28.2 in² (181.9 cm²) |
Section Properties (strong / weak axis)
| Moment of inertia Ix | 833 in⁴ (34,672 cm⁴) |
| Section modulus Sx | 131 in³ (2,147 cm³) |
| Radius of gyration rx | 5.44 in |
| Moment of inertia Iy | 270 in⁴ (11,238 cm⁴) |
| Section modulus Sy | 44.4 in³ (728 cm³) |
| Radius of gyration ry | 3.09 in |
Compared with the neighbouring sizes
| Shape | d × bf (in) | lb/ft | Ix (in⁴) | Sx (in³) | Δ weight | Δ Ix |
|---|---|---|---|---|---|---|
| W12x87 | 12.5 × 12.1 | 87 | 740 | 118 | −9 % | −11 % |
| W12x96 (this page) | 12.7 × 12.2 | 96 | 833 | 131 | — | — |
| W12x106 | 12.9 × 12.2 | 106 | 933 | 145 | +10 % | +12 % |
Deflection example
A simply supported W12x96 spanning 20 ft with a 10 kip point load at midspan deflects 0.12 in (E = 29,000 ksi, Ix = 833 in⁴). The L/360 serviceability limit for this span is 0.67 in — the shape passes this quick check.
Calculate with your own span and load →
Frequently asked questions
How much does a W12x96 beam weigh?
W12x96 weighs 96 pounds per foot (142.9 kg/m). The number after the "x" in the designation is always the weight in lb/ft. A 20 ft bar weighs 1,920 lb and a 40 ft bar 3,840 lb.
What are the dimensions of a W12x96?
W12x96 is 12.7 in (322.6 mm) deep with a 12.2 in (309.9 mm) wide flange. The web is 0.55 in thick and the flanges are 0.9 in thick. Note the actual depth differs from the nominal W12 label — always design with the actual value.
What are the dimensions of a W12x96 in mm?
W12x96 is 322.6 mm deep with a 309.9 mm wide flange; the web is 14 mm and the flange 22.9 mm thick. In metric section properties: Ix = 34,672 cm⁴, Sx = 2,147 cm³.
How much does a W12x96 weigh in kg?
142.9 kg per meter. A 6 m bar weighs 857 kg and a 12 m bar 1,714 kg — handy when ordering US shapes from metric suppliers.
What is the moment of inertia of a W12x96?
About the strong axis, Ix = 833 in⁴ (34,672 cm⁴) with section modulus Sx = 131 in³. About the weak axis, Iy = 270 in⁴ and Sy = 44.4 in³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
W12x96 or W12x106 — what does one size up change?
W12x106 is about 10% heavier (106 vs 96 lb/ft) but about 12% stiffer (Ix 933 vs 833 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