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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

Compression strut system

Design Principles

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

A compression strut comprises a central tubular section with a threaded taper connection welded at each end.

The taper connection is assembled with a threaded fork/pin end connection and threaded lock cover. The threaded fork end connection enables the compression strut to be adjusted in length. The nominal strut adjustment length is +/- 50 mm.

The tapered lock cover and machined cone conceal the threads.

The installed compression strut is fixed to the final length by use of a grub screw set into the cone.

The strut system is designed in accordance with EN1993-1-1 and EN1993 -1-8 and their respective UK National Annexes. The ultimate capacities quoted take account of self-weight bending of the strut in accordance with equation 6.10, Table NA.A1.2(B) UK National Annex to EN1990.

Critical Sections

1  CHS verification

  • Section capacity (combined bending & axial)

2  Interface between CHS & welded cone

  • Weld size required

3  Threaded bar

  • Combined bending & axial
  • Axial resistance of thread

4Fork

  • Combined bending & axial

5 Pin

  • Combined bending & shear

NB: Reference to ‘bending’ above means the summation of strut buckling and self-weight bending effects.

All material factors are as the UK National Annex.