Hello, making an attempt to create my first post here because I need some professional help. I'm in the process of extending the house a bit and plan to open an old exterior wall on my old house to get a larger living room. I will need to support the upper floor with a beam instead. It will be a span of 4290mm in the "gap" between the new and old parts. I'm trying to attach a picture where the yellow part should show where it should be. (Not a Picasso either 
), but this is where my knowledge about calculations and loads ends. So now I'm hoping for some awesome person who can help me determine which type of beam I need for this. Thanks in advance.
), but this is where my knowledge about calculations and loads ends. So now I'm hoping for some awesome person who can help me determine which type of beam I need for this. Thanks in advance.
It is a relatively long span, which can lead to significant point loads that the foundation may not be able to handle. I would suggest contacting a structural engineer to perform the calculations for you. That way, you also have protection if something goes slightly wrong.
Thanks for the quick response, it is of course a risk that it is too weak a foundation for this. However, the new part is self-supporting so it will not add any load to this and I also believe that I can distribute the load from the old part on the new one. That's what I was thinking anyway. It's directly on rock, so it’s more about whether you can shorten the span a little, but specifically if there is any specific beam you should use.
It's directly on rock, so it’s more about whether you can shorten the span a little, but specifically if there is any specific beam you should use.
