Therefore, a B1 connection is sometimes used as an alternative. This can be an issue when space is limited. Regular splice connections (A1 & A2) can add as much as 100mm to the depth of a beam, with the additional plates and bolts. If your beam flanges and web are 12mm thick then the plates used for the splice connection should also be 12mm thick. These bolts are expensive, so if you are told they are necessary it might be a good idea to talk to your Structural Engineer to see if there is a possibility of a redesign enable you to use the normal, more cost effective, 8.8 grade bolts.Īs a general rule of thumb the flat plates used in splice connections should be the same thickness as the flange or web they are affixed to. In some cases, HSFG (High Strength Friction Grip) bolts are required, in which case the beam ends and the splice plates must not be primed. Your structural engineer will have specified which connection is best for your structure. The flat plates are connected in different ways (listed below) depending on the requirements. Splice connections are flat plates of steel fixed to the beam to hold the joint/splice secure. This configuration can also be used when access is a concern. Instead the beam is cut into two or possibly even three sections and then fixed together using a splice connection in situ. Splices are a cut in a beam usually needed when a beam is too long or heavy to be installed in one piece.
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