W14x145 — Dimensions, Weight & Section Properties
American wide-flange (W) beam per ASTM A6 / AISC Steel Construction Manual
W14x145 is an American wide-flange beam 14.8 inches (375.9 mm) deep with a 15.5 in (393.7 mm) flange, weighing 145 pounds per foot (215.8 kg/m) — that is what the "145" 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 | 14.8 in (375.9 mm) |
| Flange width bf | 15.5 in (393.7 mm) |
| Web thickness tw | 0.68 in (17.3 mm) |
| Flange thickness tf | 1.09 in (27.7 mm) |
Weight & Cross-Section
| Weight per foot | 145 lb/ft (215.8 kg/m) |
| 20 ft bar | 2,900 lb |
| 40 ft bar | 5,800 lb |
| Area A | 42.7 in² (275.5 cm²) |
Section Properties (strong / weak axis)
| Moment of inertia Ix | 1,710 in⁴ (71,175 cm⁴) |
| Section modulus Sx | 232 in³ (3,802 cm³) |
| Radius of gyration rx | 6.33 in |
| Moment of inertia Iy | 677 in⁴ (28,179 cm⁴) |
| Section modulus Sy | 87.3 in³ (1,431 cm³) |
| Radius of gyration ry | 3.98 in |
Compared with the neighbouring sizes
| Shape | d × bf (in) | lb/ft | Ix (in⁴) | Sx (in³) | Δ weight | Δ Ix |
|---|---|---|---|---|---|---|
| W14x132 | 14.7 × 14.7 | 132 | 1,530 | 209 | −9 % | −11 % |
| W14x145 (this page) | 14.8 × 15.5 | 145 | 1,710 | 232 | — | — |
| W14x159 | 15 × 15.6 | 159 | 1,900 | 254 | +10 % | +11 % |
Deflection example
A simply supported W14x145 spanning 24 ft with a 10 kip point load at midspan deflects 0.1 in (E = 29,000 ksi, Ix = 1,710 in⁴). The L/360 serviceability limit for this span is 0.8 in — the shape passes this quick check.
Calculate with your own span and load →
Frequently asked questions
How much does a W14x145 beam weigh?
W14x145 weighs 145 pounds per foot (215.8 kg/m). The number after the "x" in the designation is always the weight in lb/ft. A 20 ft bar weighs 2,900 lb and a 40 ft bar 5,800 lb.
What are the dimensions of a W14x145?
W14x145 is 14.8 in (375.9 mm) deep with a 15.5 in (393.7 mm) wide flange. The web is 0.68 in thick and the flanges are 1.09 in thick. Note the actual depth differs from the nominal W14 label — always design with the actual value.
What are the dimensions of a W14x145 in mm?
W14x145 is 375.9 mm deep with a 393.7 mm wide flange; the web is 17.3 mm and the flange 27.7 mm thick. In metric section properties: Ix = 71,175 cm⁴, Sx = 3,802 cm³.
How much does a W14x145 weigh in kg?
215.8 kg per meter. A 6 m bar weighs 1,295 kg and a 12 m bar 2,589 kg — handy when ordering US shapes from metric suppliers.
What is the moment of inertia of a W14x145?
About the strong axis, Ix = 1,710 in⁴ (71,175 cm⁴) with section modulus Sx = 232 in³. About the weak axis, Iy = 677 in⁴ and Sy = 87.3 in³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
W14x145 or W14x159 — what does one size up change?
W14x159 is about 10% heavier (159 vs 145 lb/ft) but about 11% stiffer (Ix 1,900 vs 1,710 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