Compression strut system

Adjustable compression struts with a central tubular section and a threaded fork end and pin connection at each end, in carbon steel and stainless steel.

M12 to M100 carbon · M12 to M56 stainless

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 drawing showing parts 1 to 5, load P in kN, effective length S1, pin to pin length S2 and pin to point of resistance S3

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

Carbon Steel
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

Stainless Steel
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

Partial factors
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

Partial factors (2)
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.