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Crane Knee Joints

Crane knee joints for cranes rails to run on.

When supporting or attaching an overhead crane to a building some clients ask that we use knee joints, or knee brackets as they are often called to support the crane rails.

Knee joints, pictured below, are fastened the building upright column. This saves our customers money, as they do not need crane free standing column steelwork as well.

We can supply knee joints, however some clients fasten the knee joints themselves prior to the crane being delivered. Alternatively you can ask your builders to include knee joints when the factory is being built. We can supply crane weights and the forces imposed if required.

We can advise on crane beam depths etc prior to an order being placed.

  Crane tracks on knee joints


Please remember. If we are landing our crane onto your free issue rails, please ensure:

  • Your installation team to leave enough room above the knee bracket for the down shop tracks, AND the crane beam and end carriages.
  • You leave a minimum of 250mm between the building uprights to the centre line of the crane rails, so we can lift, turn and land the crane.
  • Please don’t forget the fit the sold bar, or rail. The crane does not run on the universal beam it runs on the solid bar welded to it.
  • Lastly please ensure the span of the rails are parallel and within plus or minus 2mm tolerance.

If any of the above are not done correctly the crane installation will have to be aborted. Alternatively we can take this headache away for you, by supplying and installing your crane steelwork. It’s what we do.

crane solid bar

Crane solid bar/rail

If this page has been helpful and you would like to learn a little more about crane steelwork, click here.