Trusscalculator App

If you want to use a trusscircle but you don't know if your expensive soundsystem is too heavy to hang it, you can check it in our app.

By entering the diameter of the circle you want to use and the number of hanging points the trusscalculator will give you the answers about the load capacity immediately.

Check out our app:

Rental Catalogue


Roof Systems

Clamps & Rigging



You can download our product library in DWG format here. Our library is made up of a sales and rental section.

You will find Interal’s rental stock in the Rental section, which is made up of products actually available for rental. The Sales section is a great deal more extensive, as this shows all the products we can produce as standard.

Please don’t hesitate to contact us if you can’t find something; we have built up a large archive of special products and custom-made truss elements over the past 15 years. Please do let us know if this doesn’t include what you’re looking for either. We can then discuss matters together and decide whether it’s possible to further develop any specific ideas.

Our libraries have been compiled with the greatest of care, but you, as the draughtsman/builder/user, will remain responsible and liable for whatever you have created. Please contact us with questions of any nature and we’ll work on a suitable solution together with you.

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