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Load Capacity Data

The tables below give the size of the compression strut required, based on the strut length and the load capacity required by your design.

Compression Strut Diagram

Carbon Steel

Each compression strut is custom made, so alternative designs and end connections can be accommodated. Below are examples of typical loads which can be expected at the tabulated lengths.

T8 Carbon steel tubes: BS EN10210-1 Grade S355JR

Fork/Bar Sizes M12 M16 M20 M24 M30 M36 M42 M48 M56 M64 M76 M90 M100
CHS Size (diameter x t mm) 33.7 x 4 42.4 x 4 48.3 x 5 60.3 x 5 76.1 x 5 88.9 x 5 114.3 x 6.3 139.7 x 10 168.3 x 10 193.7 x 10 244.5 x 16 273 x 16 323.9 x 16
S1 (m) P  -- Design Resistance in kN
1.5 8 25 45 74 127 216 306 426 600 837 1207 1807 2376
2   17 29 56 127 216 306 426 600 837 1207 1807 2376
2.5   13 22 40 98 202 306 426 600 837 1207 1807 2376
3   10 18 31 74 153 306 426 600 837 1207 1807 2376
3.5     15 26 60 122 306 426 600 837 1207 1807 2376
4     13 22 51 102 199 359 600 837 1207 1807 2376
4.5     12 20 44 88 168 300 560 837 1207 1807 2376
5     10 17 39 78 146 258 480 781 1207 1807 2376
5.5       16 35 66 129 226 416 683 1207 1807 2376
6       14 32 55 116 201 367 600 1194 1807 2376
6.5       13 29 47 106 182 328 532 1074 1783 2376
7       11 24 40 97 166 297 478 965 1624 2376
7.5       10 21 35 90 154 272 434 872 1475 2376
8         18 30 82 143 251 398 793 1342 2226
8.5         16 27 72 133 233 368 727 1226 2062
9         14 23 64 125 218 342 670 1126 1908
9.5         12 21 57 118 205 320 623 1041 1767
10         11 18 51 112 194 301 582 968 1640
11         9 15 41 101 175 270 515 849 1429
12           12 34 93 159 245 464 759 1265
S3  (mm) max 50 50 50 75 100 100 100 125 125 175 200 225 250

Tubes with a higher minimum yield can be acquired on a longer lead time for specific projects. We can provide our calculations to ensure your design meets the building requirements.

Stainless Steel

T9 Stainless steel tubes in grade 316 to BS EN10296 - min. Yield Stress of 230 N/mm2

Fork/Bar Sizes M12 M16 M20 M24 M30 M36 M42 M48 M56
CHS Size (diameter x t mm) 33.7 x 4 42.4 x 4 48.3 x 5 60.3 x 5 76.1 x 5 88.9 x 5 114.3 x 6.3 139.7 x 10 168.3 x 10
S1 m P  --- Design Resistance in kN
1.5 6 18 39 78 159 270 382 426 772
2   12 26 48 123 261 382 426 772
2.5   10 19 35 84 178 382 426 772
3     16 27 65 133 287 400 772
3.5     13 23 53 107 222 388 600
4     12 20 45 90 181 327 636
4.5     10 17 39 78 154 275 523
5       16 35 67 134 237 441
5.5       14 32 55 119 208 381
6       12 27 45 108 187 336
S3 (mm) max 50 50 50 75 100 100 100 125 125

Tubes with a higher minimum yield can be acquired on a longer lead time for specific projects. We can provide our calculations to ensure your design meets the building requirements.

Partial factors

The allowable loads refer to the minimum design resistance in KN, calculated using the UK National Annex, material and Load Factors.

Partial factors for design of building members/sections EN1993-1-1

YM0 YM1 YM2 YM3 YM4 YM5 YM6 YM7
1.00 1.00 1.10 1.25 1.10 1.00 1.00 1.00

Partial factors for design of building connections/joints EN1993-1-8

YM0 YM1 YM2 YM3 YM4 YM5 YM6 YM6,ser YM7
1.00 1.00 1.25 1.25 1.10 1.00 1.00 1.00 1.10

Daver Steels Structural Design Service

Daver Steels offer a structural design service for our compression struts when incorporated to your structural design. This is supplied with certification, verified by a third party consultant engineer. Please enquire for a quotation.