W5x19 — Dimensions, Weight & Section Properties
American wide-flange (W) beam per ASTM A6 / AISC Steel Construction Manual
W5x19 is an American wide-flange beam 5.15 inches (130.8 mm) deep with a 5.03 in (127.8 mm) flange, weighing 19 pounds per foot (28.3 kg/m) — that is what the "19" 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 | 5.15 in (130.8 mm) |
| Flange width bf | 5.03 in (127.8 mm) |
| Web thickness tw | 0.27 in (6.9 mm) |
| Flange thickness tf | 0.43 in (10.9 mm) |
Weight & Cross-Section
| Weight per foot | 19 lb/ft (28.3 kg/m) |
| 20 ft bar | 380 lb |
| 40 ft bar | 760 lb |
| Area A | 5.56 in² (35.9 cm²) |
Section Properties (strong / weak axis)
| Moment of inertia Ix | 26.3 in⁴ (1,095 cm⁴) |
| Section modulus Sx | 10.2 in³ (167 cm³) |
| Radius of gyration rx | 2.17 in |
| Moment of inertia Iy | 9.13 in⁴ (380 cm⁴) |
| Section modulus Sy | 3.63 in³ (59 cm³) |
| Radius of gyration ry | 1.28 in |
Compared with the neighbouring sizes
| Shape | d × bf (in) | lb/ft | Ix (in⁴) | Sx (in³) | Δ weight | Δ Ix |
|---|---|---|---|---|---|---|
| W5x16 | 5.01 × 5 | 16 | 21.4 | 8.55 | −16 % | −19 % |
| W5x19 (this page) | 5.15 × 5.03 | 19 | 26.3 | 10.2 | — | — |
Deflection example
A simply supported W5x19 spanning 8 ft with a 10 kip point load at midspan deflects 0.24 in (E = 29,000 ksi, Ix = 26.3 in⁴). The L/360 serviceability limit for this span is 0.27 in — the shape passes this quick check.
Calculate with your own span and load →
Frequently asked questions
How much does a W5x19 beam weigh?
W5x19 weighs 19 pounds per foot (28.3 kg/m). The number after the "x" in the designation is always the weight in lb/ft. A 20 ft bar weighs 380 lb and a 40 ft bar 760 lb.
What are the dimensions of a W5x19?
W5x19 is 5.15 in (130.8 mm) deep with a 5.03 in (127.8 mm) wide flange. The web is 0.27 in thick and the flanges are 0.43 in thick. Note the actual depth differs from the nominal W5 label — always design with the actual value.
What are the dimensions of a W5x19 in mm?
W5x19 is 130.8 mm deep with a 127.8 mm wide flange; the web is 6.9 mm and the flange 10.9 mm thick. In metric section properties: Ix = 1,095 cm⁴, Sx = 167 cm³.
How much does a W5x19 weigh in kg?
28.3 kg per meter. A 6 m bar weighs 170 kg and a 12 m bar 339 kg — handy when ordering US shapes from metric suppliers.
What is the moment of inertia of a W5x19?
About the strong axis, Ix = 26.3 in⁴ (1,095 cm⁴) with section modulus Sx = 10.2 in³. About the weak axis, Iy = 9.13 in⁴ and Sy = 3.63 in³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
W5x19 or W5x16 — what does one size down change?
W5x16 is about 16% lighter (16 vs 19 lb/ft) but about 19% less stiff (Ix 21.4 vs 26.3 in⁴). Check deflection before downsizing — stiffness falls much faster than weight.
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