HEB 300 weight and dimensions
117.03 kg/m · 78.64 lb/ft
HEB 300 is a 300 mm deep beam with a 300 mm flange, 11 mm web and 19 mm flange thickness. It weighs 117.03 kg per metre (78.64 lb/ft). It belongs to the HEB wide flange beam series, European (EN).
HEB 300 weight calculator
Weight of standard lengths
| Pieces | 6 m each (kg) | 12 m each (kg) |
|---|---|---|
| 1 | 702.2 | 1,404.4 |
| 5 | 3,510.9 | 7,021.8 |
| 10 | 7,021.8 | 14,043.6 |
| 20 | 14,043.6 | 28,087.2 |
| 50 | 35,109.0 | 70,218.0 |
Pieces per tonne
| 6 m lengths per metric tonne | 1.4 |
| 12 m lengths per metric tonne | 0.7 |
| Length per tonne | 8.5 m |
Useful for converting a tonnage order into a number of bars.
Surface area for painting
| Per metre of length | 1.732 m²/m |
| Per foot of length | 5.68 ft²/ft |
| Per tonne of steel | 14.8 m²/t |
| A 12 m length | 20.78 m² |
Outside perimeter × length, all faces, calculated from the dimensions. Use it to estimate paint, primer, fireproofing or galvanizing quantities.
Cross-section
Drawn to scale. Dimensions in mm.
Dimensions
| Depth h | 300 mm | 11.811 in |
| Flange width b | 300 mm | 11.811 in |
| Web thickness tw | 11 mm | 0.433 in |
| Flange thickness tf | 19 mm | 0.748 in |
| Root radius r | 27 mm | 1.063 in |
| Mass | 117.03 kg/m | 78.64 lb/ft |
Section properties
| Property | Value | Unit |
|---|---|---|
| Area | 149 | cm² |
| Moment of inertia Ix | 25,164 | cm⁴ |
| Moment of inertia Iy | 8,561 | cm⁴ |
| Elastic modulus Zx | 1,678 | cm³ |
| Elastic modulus Zy | 571 | cm³ |
| Radius of gyration rx | 12.99 | cm |
| Radius of gyration ry | 7.58 | cm |
Equivalent sections in other standards
The closest sections by depth and weight. They are not direct substitutes: check bending, buckling and connection details before swapping one for another.
HEB 300 and its closest equivalents, drawn over each other at the same scale.
| Section | Standard | Depth (mm) | kg/m | Weight vs HEB 300 |
|---|---|---|---|---|
| HEB 300 | EN | 300 | 117.03 | — |
| W12x79 | AISC | 315 | 117.00 | -0.0% |
| HP12x74 | AISC | 307 | 110.00 | -6.0% |
HEB series weights
Next lighter: HEB 280 (103.12 kg/m). Next heavier: HEB 320 (126.65 kg/m).
Stiffness and strength per kilogram
The elastic section modulus Zx governs bending strength. Dividing it by the weight shows how efficiently each size uses its steel: higher is better when weight is the cost driver.
| Section | kg/m | Ix (cm⁴) | Zx (cm³) | Zx per kg/m |
|---|---|---|---|---|
| HEB 240 | 83.20 | 11,259 | 938.2 | 11.28 |
| HEB 260 | 92.98 | 14,918 | 1,147.6 | 12.34 |
| HEB 280 | 103.12 | 19,269 | 1,376.4 | 13.35 |
| HEB 300 | 117.03 | 25,164 | 1,677.6 | 14.33 |
| HEB 320 | 126.65 | 30,822 | 1,926.4 | 15.21 |
| HEB 340 | 134.15 | 36,655 | 2,156.2 | 16.07 |
| HEB 360 | 141.80 | 43,192 | 2,399.5 | 16.92 |
Full table: HEB beam weight chart (PDF).
How the weight is calculated
Mass per metre = cross-sectional area × density of steel = 149.08 cm² × 0.785 kg/(cm²·m) = 117.03 kg/m.
Rolled sections are made to a nominal mass, and the actual mass can differ by a few percent within the tolerances of EN 10034 (I and H sections) or EN 10279 (channels). For purchasing, invoicing by weight or checking deliveries, use the producer's stated mass.
Typical uses
Wide flange sections like this are used as columns, heavy beams and transfer girders, where stiffness about both axes matters.
Frequently asked questions
What is the weight of HEB 300 per metre?
HEB 300 weighs 117.03 kg/m, which is 78.64 lb/ft.
How much does a 6 m or 12 m length of HEB 300 weigh?
A 6 m length weighs about 702.2 kg and a 12 m length about 1,404.4 kg.
What is the equivalent of HEB 300 in other standards?
By depth and weight the closest match is W12x79 (117 kg/m, 315 mm deep). Check section properties before substituting one for the other.
Source: EN 10365. Values are nominal; verify with the producer before ordering.