What is I beam Steel?
Hot-rolled common I-beams, also known as steel beams, are long steel bars with an I-shaped cross-section. The specifications of I-beams include sizes like 8#, 10#, 12#, 14#, 16#, 18#, 20a, 20b, 22a, 22b, 25a, 25b, 28a, 28b, 30a, 30b, and more.
Their cross-sectional dimensions are represented by the web height (h) x web thickness (d) in millimeters. For example, an I-beam with a web height of 160mm, flange width of 88mm, and web thickness of 6mm is denoted as “I-160x88x6.” Another way to mark I-beams is by using their web height in centimeters, such as I-16#.
I-beams with the same web height but different web thicknesses and flange widths are distinguished by adding a, b, or c after the size, such as 32a#, 32b#, 32c#, etc.
Primary uses: Similar to common I-beams, they are mainly used in large structural components such as factory buildings and bridges, as well as in the manufacturing of vehicles and ships.
I Beam Standard Sizes & Weight Chart
The provided chart can be used as a reference guide for the standard sizes in mm and weight of I-beams in kg.
1. Ordinary Hot Rolled I Beam Sizes & Weight Chart
Spec. | Height (mm) | Flange Width (mm) | Web Thickness (mm) | Theoretical Weight (kg/m) |
---|---|---|---|---|
10 | 100 | 68 | 4.5 | 11.261 |
12.6 | 126 | 74 | 5 | 14.223 |
14 | 140 | 80 | 5.5 | 16.89 |
16 | 160 | 88 | 6 | 20.513 |
18 | 180 | 94 | 6.5 | 24.143 |
20a | 200 | 100 | 7 | 27.929 |
20b | 200 | 102 | 9 | 31.069 |
22a | 220 | 110 | 7.5 | 33.07 |
22b | 220 | 112 | 9.5 | 36.524 |
25a | 250 | 116 | 8 | 38.105 |
25b | 250 | 118 | 10 | 42.03 |
28a | 280 | 122 | 8.5 | 43.492 |
28b | 280 | 124 | 10.5 | 47.888 |
32a | 320 | 130 | 9.5 | 52.717 |
32b | 320 | 132 | 11.5 | 57.741 |
32c | 320 | 134 | 13.5 | 62.765 |
36a | 360 | 136 | 10 | 60.037 |
36b | 360 | 138 | 12 | 65.689 |
36c | 360 | 140 | 14 | 71.341 |
40a | 400 | 142 | 10.5 | 67.598 |
40b | 400 | 144 | 12.5 | 73.878 |
40c | 400 | 146 | 14.5 | 80.158 |
45a | 450 | 150 | 11.5 | 80.42 |
45b | 450 | 152 | 13.5 | 87.485 |
45c | 450 | 154 | 15.5 | 94.55 |
50a | 500 | 158 | 12 | 93.654 |
50b | 500 | 160 | 14 | 101.504 |
50c | 500 | 162 | 16 | 109.354 |
56a | 560 | 166 | 12.5 | 106.316 |
56b | 560 | 168 | 14.5 | 115.108 |
56c | 560 | 170 | 16.5 | 123.9 |
63a | 630 | 176 | 13 | 121.407 |
63b | 630 | 178 | 15 | 131.298 |
63c | 630 | 180 | 17 | 141.189 |
2. Light Duty Hot Rolled I Beam Sizes & Weight Chart
Spec. | Height (mm) | Flange Width (mm) | Web Thickness (mm) | Theoretical Weight (kg/m) |
---|---|---|---|---|
8 | 80 | 50 | 4.5 | 7.52 |
10 | 100 | 55 | 4.5 | 9.46 |
12 | 120 | 64 | 4.8 | 11.5 |
14 | 140 | 73 | 4.9 | 13.7 |
16 | 160 | 81 | 5 | 15.9 |
18 | 180 | 90 | 5.1 | 18.4 |
18a | 180 | 100 | 5.1 | 19.9 |
20 | 200 | 100 | 5.2 | 21 |
20a | 200 | 110 | 5.2 | 22.7 |
22 | 220 | 110 | 5.4 | 24 |
22a | 220 | 120 | 5.4 | 25.8 |
24 | 240 | 115 | 5.6 | 27.3 |
24a | 240 | 125 | 5.6 | 29.4 |
27 | 270 | 125 | 6 | 31.5 |
27a | 270 | 135 | 6 | 33.9 |
30 | 300 | 135 | 6.5 | 36.5 |
30a | 300 | 145 | 6.5 | 39.2 |
33 | 330 | 140 | 7 | 42.2 |
36 | 360 | 145 | 7.5 | 48.6 |
40 | 400 | 155 | 8 | 56.1 |
45 | 450 | 160 | 8.6 | 65.2 |
50 | 500 | 170 | 9.5 | 76.8 |
55 | 550 | 180 | 10.3 | 89.8 |
60 | 600 | 190 | 11.1 | 104 |
65 | 650 | 200 | 12 | 120 |
70 | 700 | 210 | 13 | 138 |
70a | 700 | 210 | 15 | 158 |
70b | 700 | 210 | 17.5 | 184 |
I Beam Sizes Chart PDF Download:
I Beam Weight Calculator
Related reading:
The Difference Between Standard and Light I-Beams
Standard I-beams are processed from regular steel, while light I-beams are made from lightweight alloys such as aluminum and magnesium. When compared to standard I-beams, light I-beams have wider flanges and thinner webs and flanges. Given the same depth, light I-beams offer better stability while ensuring the same load-bearing capacity, thus saving metal and providing better economic efficiency.
Regardless of whether they are standard or light, I-beams tend to have relatively high and narrow cross-sectional dimensions, resulting in a significant difference in the moment of inertia about the two main axes.
Therefore, they are typically used directly for members subjected to bending within the plane of their web or as part of a lattice force member. When used individually, they can only serve as general bending members and eccentric compression members, such as secondary beams or eccentric columns in work platforms.
However, when used as composite sections, they can function as the main compression members.
I-beams come in standard and light varieties.
Compared to the same model of standard I-beam, light I-beams have a smaller thickness and lighter weight. The flange width varies with the model size: smaller models (I32# and below) have narrower flange widths than standard I-beams, while larger models (I40# and above) have wider flange widths.
This is very informative
Thanks.
You’re welcome.
Wanting to lift 500kg with girder trolley on an Hbeam 6 metres long
What size of i beam should i get
What size of h beam should i get
6 inch*6inch I section
400 feet
Hello, my name is Nelson:
I want to build a 2 ton gantry with a span of 10 ft. How tall and thickness does an I beam has to be.
Good morning
i Whant to build a 5 ton single Girder gantry crane, what size I beam should i need for the top main beam and what size beam can i use for the legs.
thank you in advance
Jimmy
Hi can youmplease help. I am building Root cellar 20ftx30ft and on top of it a church for 150people including children can you please give me idea what Ibeam or Hbeam should I used on the rootcellar that can also carry a worshipper 150 more or less? how many post Appreciate much your reply.
All the best
erlinda
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What size I beam should.I want to lift 20 ton genset.
Nneed to calculate load carrying capacity of an I Beam Flange 4″ X Web 6″ thickness 8MM, Length 28′, vertically support structure? Thnx in advance