W14x43 — Dimensions, Weight & Section Properties
American wide-flange (W) beam per ASTM A6 / AISC Steel Construction Manual
W14x43 is an American wide-flange beam 13.7 inches (348 mm) deep with a 8 in (203.2 mm) flange, weighing 43 pounds per foot (64 kg/m) — that is what the "43" 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 | 13.7 in (348 mm) |
| Flange width bf | 8 in (203.2 mm) |
| Web thickness tw | 0.305 in (7.7 mm) |
| Flange thickness tf | 0.53 in (13.5 mm) |
Weight & Cross-Section
| Weight per foot | 43 lb/ft (64 kg/m) |
| 20 ft bar | 860 lb |
| 40 ft bar | 1,720 lb |
| Area A | 12.6 in² (81.3 cm²) |
Section Properties (strong / weak axis)
| Moment of inertia Ix | 428 in⁴ (17,815 cm⁴) |
| Section modulus Sx | 62.6 in³ (1,026 cm³) |
| Radius of gyration rx | 5.82 in |
| Moment of inertia Iy | 45.2 in⁴ (1,881 cm⁴) |
| Section modulus Sy | 11.3 in³ (185 cm³) |
| Radius of gyration ry | 1.89 in |
Compared with the neighbouring sizes
| Shape | d × bf (in) | lb/ft | Ix (in⁴) | Sx (in³) | Δ weight | Δ Ix |
|---|---|---|---|---|---|---|
| W14x38 | 14.1 × 6.77 | 38 | 385 | 54.6 | −12 % | −10 % |
| W14x43 (this page) | 13.7 × 8 | 43 | 428 | 62.6 | — | — |
| W14x48 | 13.8 × 8.03 | 48 | 484 | 70.2 | +12 % | +13 % |
Deflection example
A simply supported W14x43 spanning 22 ft with a 10 kip point load at midspan deflects 0.31 in (E = 29,000 ksi, Ix = 428 in⁴). The L/360 serviceability limit for this span is 0.73 in — the shape passes this quick check.
Calculate with your own span and load →
Frequently asked questions
How much does a W14x43 beam weigh?
W14x43 weighs 43 pounds per foot (64 kg/m). The number after the "x" in the designation is always the weight in lb/ft. A 20 ft bar weighs 860 lb and a 40 ft bar 1,720 lb.
What are the dimensions of a W14x43?
W14x43 is 13.7 in (348 mm) deep with a 8 in (203.2 mm) wide flange. The web is 0.31 in thick and the flanges are 0.53 in thick. Note the actual depth differs from the nominal W14 label — always design with the actual value.
What are the dimensions of a W14x43 in mm?
W14x43 is 348 mm deep with a 203.2 mm wide flange; the web is 7.7 mm and the flange 13.5 mm thick. In metric section properties: Ix = 17,815 cm⁴, Sx = 1,026 cm³.
How much does a W14x43 weigh in kg?
64 kg per meter. A 6 m bar weighs 384 kg and a 12 m bar 768 kg — handy when ordering US shapes from metric suppliers.
What is the moment of inertia of a W14x43?
About the strong axis, Ix = 428 in⁴ (17,815 cm⁴) with section modulus Sx = 62.6 in³. About the weak axis, Iy = 45.2 in⁴ and Sy = 11.3 in³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
W14x43 or W14x48 — what does one size up change?
W14x48 is about 12% heavier (48 vs 43 lb/ft) but about 13% stiffer (Ix 484 vs 428 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