W27x102 — Dimensions, Weight & Section Properties
American wide-flange (W) beam per ASTM A6 / AISC Steel Construction Manual
W27x102 is an American wide-flange beam 27.1 inches (688.3 mm) deep with a 10 in (254 mm) flange, weighing 102 pounds per foot (151.8 kg/m) — that is what the "102" 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 | 27.1 in (688.3 mm) |
| Flange width bf | 10 in (254 mm) |
| Web thickness tw | 0.515 in (13.1 mm) |
| Flange thickness tf | 0.83 in (21.1 mm) |
Weight & Cross-Section
| Weight per foot | 102 lb/ft (151.8 kg/m) |
| 20 ft bar | 2,040 lb |
| 40 ft bar | 4,080 lb |
| Area A | 30 in² (193.5 cm²) |
Section Properties (strong / weak axis)
| Moment of inertia Ix | 3,620 in⁴ (150,675 cm⁴) |
| Section modulus Sx | 267 in³ (4,375 cm³) |
| Radius of gyration rx | 11 in |
| Moment of inertia Iy | 139 in⁴ (5,786 cm⁴) |
| Section modulus Sy | 27.8 in³ (456 cm³) |
| Radius of gyration ry | 2.15 in |
Compared with the neighbouring sizes
| Shape | d × bf (in) | lb/ft | Ix (in⁴) | Sx (in³) | Δ weight | Δ Ix |
|---|---|---|---|---|---|---|
| W27x94 | 26.9 × 10 | 94 | 3,270 | 243 | −8 % | −10 % |
| W27x102 (this page) | 27.1 × 10 | 102 | 3,620 | 267 | — | — |
| W27x114 | 27.3 × 10.1 | 114 | 4,080 | 299 | +12 % | +13 % |
Deflection example
A simply supported W27x102 spanning 43 ft with a 10 kip point load at midspan deflects 0.27 in (E = 29,000 ksi, Ix = 3,620 in⁴). The L/360 serviceability limit for this span is 1.43 in — the shape passes this quick check.
Calculate with your own span and load →
Frequently asked questions
How much does a W27x102 beam weigh?
W27x102 weighs 102 pounds per foot (151.8 kg/m). The number after the "x" in the designation is always the weight in lb/ft. A 20 ft bar weighs 2,040 lb and a 40 ft bar 4,080 lb.
What are the dimensions of a W27x102?
W27x102 is 27.1 in (688.3 mm) deep with a 10 in (254 mm) wide flange. The web is 0.52 in thick and the flanges are 0.83 in thick. Note the actual depth differs from the nominal W27 label — always design with the actual value.
What are the dimensions of a W27x102 in mm?
W27x102 is 688.3 mm deep with a 254 mm wide flange; the web is 13.1 mm and the flange 21.1 mm thick. In metric section properties: Ix = 150,675 cm⁴, Sx = 4,375 cm³.
How much does a W27x102 weigh in kg?
151.8 kg per meter. A 6 m bar weighs 911 kg and a 12 m bar 1,822 kg — handy when ordering US shapes from metric suppliers.
What is the moment of inertia of a W27x102?
About the strong axis, Ix = 3,620 in⁴ (150,675 cm⁴) with section modulus Sx = 267 in³. About the weak axis, Iy = 139 in⁴ and Sy = 27.8 in³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
W27x102 or W27x114 — what does one size up change?
W27x114 is about 12% heavier (114 vs 102 lb/ft) but about 13% stiffer (Ix 4,080 vs 3,620 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