What are the main differences between HW, HM, and HN H-beam series?

The primary difference is the flange-to-web ratio. HW (Wide Flange) has a width nearly equal to its height (ratio ≈ 1:1). HM (Middle Flange) has a ratio of 1:1.5 to 1:1.8. HN (Narrow Flange) has a ratio of 1:2 or higher, making it much taller than it is wide.

Should I use HW or HN H-beams for structural columns?

For structural columns, HW (Wide Flange) is the professional choice. Its square-like profile provides balanced strength in both axes, offering superior resistance to axial compression compared to the narrow HN series.

Can HN H-beams be used as a replacement for traditional I-beams?

Yes, HN H-beams are the modern standard for replacing I-beams in bending applications. While they share a narrow profile, HN beams feature parallel inner flange surfaces which make them significantly easier to bolt and weld in steel frameworks.

The Definitive Guide to H-Beam Weight: HW, HM, and HN Series

Published by Ruixiang Steel Technical Department | February 2026

In structural engineering, selecting the correct H-beam series is crucial for balancing load-bearing capacity and cost-efficiency. H-beams are categorized into three main types: HW (Wide Flange), HM (Middle Flange), and HN (Narrow Flange). Each serves a specific purpose based on its cross-sectional modulus and weight.

How to Calculate H-Beam Weight?

The standard formula for H-beam weight is based on the cross-sectional area. However, for quick estimates, you can use the theoretical weight per meter (kg/m):

Weight (kg/m) = [Height × Web Thickness + (Flange Width - Web Thickness) × Flange Thickness × 2] × 0.00785

Theoretical Weight Chart (Common Sizes)

Below is a selection of the most frequently used sizes in the HW, HM, and HN series. For a full catalog, please contact our sales team.

Series	Size (mm) Height × Width	Web Thickness (t1)	Flange Thickness (t2)	Weight (kg/m)
HW (Wide)	100 × 100	6.0	8.0	17.2
HW (Wide)	200 × 200	8.0	12.0	50.5
HM (Middle)	150 × 100	6.0	9.0	21.1
HM (Middle)	300 × 200	8.0	12.0	56.7
HN (Narrow)	200 × 100	5.5	8.0	21.3
HN (Narrow)	400 × 200	8.0	13.0	66.0

Frequently Asked Questions: HW, HM & HN H-Beams

1. What are the main differences between HW, HM, and HN series?

The key distinction lies in the flange-to-web ratio. HW (Wide Flange) is nearly square (1:1), HM (Middle Flange) is slightly taller, and HN (Narrow Flange) is significantly taller than it is wide (1:2+), similar in appearance to an I-beam.

2. Which H-beam is best for building columns?

HW H-beams are specifically engineered for columns. Their balanced width-to-height ratio provides excellent stability under axial compression and resists lateral bending better than HM or HN profiles.

3. Can HN H-beams replace I-beams in girders?

Yes. HN beams are the preferred modern alternative to I-beams. Their parallel flange design simplifies structural connections (bolting and welding), making them highly efficient for use as horizontal girders and bending members.

H-Beam Weight Chart: Ultimate Guide for HW, HM, and HN Series

The Definitive Guide to H-Beam Weight: HW, HM, and HN Series

How to Calculate H-Beam Weight?

Theoretical Weight Chart (Common Sizes)

Frequently Asked Questions: HW, HM & HN H-Beams

1. What are the main differences between HW, HM, and HN series?

2. Which H-beam is best for building columns?

3. Can HN H-beams replace I-beams in girders?

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