Design Guidelines for Beam Joints

according to VDI 2230 Guidelines

Beam Joints
Item Guidelines for design Disadvantages Advantages
1 Preloads: Preloads as high as possible *Higher strength grade *Exact tightening method *Low coefficients of friction Low Preloads High preloads (Choose tightening method with small tightening factor)
Width of beam: Utilise the recommended beam width b=dw =h if possible  Very narrow joints Width of b=dw =h min beam
Beam Joint Diagram 1 Beam Joint Diagram 2
Height of the beam: Greater beam heights result in lower additional bolt forces  Small height of beams Large height of beams
Beam Joint Diagram 3 Beam Joint Diagram 4
Overhang: If possible, design an overhang so that the supporting effect can completely develop. Point U (limit of the bearing surface) is defined by a step.  Minimal overhang Overhang ü =h
Beam Joint Diagram 5 Beam Joint Diagram 6
Connecting parts: The additional bolt force (difference force) decreases when when the connecting parts force a parallel movement on the beam  Loose coupling Tight coupling
Beam Joint Diagram 7 Beam Joint Diagram 8


Note: Due to the fact that fastening applications differ greatly, the above information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.