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The pad stone is 400mm wide x 225mm high and 10mm deep (approx)

Thanks - I am glad you see my predicament - the existing beam sits in the pad 100mm either side - I have been told this is not enough and should be 150 hence I have to replace the beam however once I take the old one out and replace it building compliance insist on seeing calculations confirming...

current beam(s) are 157mm high and 157mm wide by 3.3m long - only a 100mm support on each end and it was a surveyor who said as far as he was concerned they looked inadequate, building control wont help all they say is they need to see calculations before they will confirm anything.

I have been advised that the existing beam is undersized and I need to show proof of suitability to building control via the calculations

Hi all I need some help from someone who can assist with doing the appropriate calculations for the installation of an RSJ for a kitchen renovation in my house. basically there is an existing steel girder in at the moment quite low (about 1.9M from the floor) and I want to raise this to about...