Design Guidelines for Beam Joints

according to VDI 2230 Guidelines

Beam Joints
ItemGuidelines for designDisadvantagesAdvantages
1Preloads: Preloads as high as possible *Higher strength grade *Exact tightening method *Low coefficients of frictionLow PreloadsHigh preloads (Choose tightening method with small tightening factor)
Width of beam: Utilise the recommended beam width b=dw =h if possible Very narrow jointsWidth of b=dw =h min beam
Height of the beam: Greater beam heights result in lower additional bolt forces Small height of beamsLarge height of beams
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 overhangOverhang ü =h
Connecting parts: The additional bolt force (difference force) decreases when when the connecting parts force a parallel movement on the beam Loose couplingTight coupling

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.