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I-beam

As the name suggests, the I-beam is an “I”-shaped cross-section steel. The inner surface of the upper and lower flanges has a slope, so the cross-sectional properties of the I-beam on the two main planes are very different, and it is difficult to use the steel in the application. strength properties. Although thickened I-beams have also appeared on the I-beam market, the structure of I-beams has determined its shortcomings in torsional performance.

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The use of I-beam

Widely used in various building structures and engineering structures, such as beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks and warehouse shelves, etc.

The selection of I-beams in structural design should be based on its mechanical properties, chemical properties, weldability, structural dimensions, etc. to select reasonable I-beams for use.

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I-Beam
I-beam specification

Standard of Chinese Mill Plant GB/T 11263-2010

Designation Mass per Unit Length Depth of Section Width of Section Web Thickness Flange Thickness
kg/m h(mm) b(mm) s(mm) t(mm)
10 11.3 100 68 4.5 7.6
12.6 14.2 126 74 5.0 8.4
14 16.9 140 80 5.5 9.1
16 20.5 160 88 6.0 9.9
18 24.1 180 94 6.5 10.7
20a 27.9 200 100 7.0 11.4
20b 31.1 200 102 9.0 11.4
22a 33.1 220 110 7.5 12.3
22b 36.5 220 112 9.5 12.3
25a 38.1 250 116 8.0 13.0
25b 42.0 250 118 10.0 13.0
28a 43.5 280 122 8.5 13.7
28b 47.9 280 124 10.5 13.7
32a 52.7 320 130 9.5 15.0
32b 57.7 320 132 11.5 15.0
32c 62.8 320 134 13.5 15.0
36a 60.0 360 136 10.0 15.8
36b 65.7 360 138 12.0 15.8
36c 71.3 360 140 14.0 15.8
40a 67.6 400 142 10.5 16.5
40b 73.9 400 144 12.5 16.5
40c 80.2 400 146 14.5 16.5
45a 80.4 450 150 11.5 18.0
45b 87.5 450 152 13.5 18.0
45c 94.6 450 154 15.5 18.0
50a 93.7 500 158 12.0 20.0
50b 101.5 500 160 14.0 20.0
50c 109.4 500 162 16.0 20.0
56a 106.3 560 166 12.5 21.0
56b 115.1 560 168 14.5 21.0
56c 123.9 560 170 16.5 21.0
63a 121.4 630 176 13.0 22.0
63b 131.3 630 178 15.0 22.0
63c 141.2 630 180 17.0 22.0
12① 14.0 120 74 5.0 8.4
24a① 37.5 240 116 8.0 13.0
24b① 41.2 240 118 10.0 13.0
27a① 42.8 270 122 8.5 13.7
27b① 47.1 270 124 10.5 13.7
30a① 48.1 300 126 9.0 14.4
30b① 52.8 300 128 11.0 14.4
30c① 57.5 300 130 13.0 14.4
55a① 105.3 550 168 12.5 21.0
55b① 114.0 550 168 14.5 21.0
55c① 122.6 550 170 16.5 21.0

Non-standard sizes and thicknesses can be customized according to customer requirements. Welcome to call: +852-65561469.

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