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) |
| 2 | Width of beam: Utilise the recommended beam width b=dw =h if possible |
Very narrow joints
 |
Width of b=dw =h min beam
 |
| 3 | Height of the beam: Greater beam heights result in lower additional bolt forces |
Small height of beams
 |
Large height of beams
 |
| 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
 |
| 5 | 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
 |