8m steel beam will be fun to install and may require steel posts (with footings) at each end.
What's an 8m steel beam and sliding/folding glass going to cost me?
lots
may require steel posts (with footings) at each end
It will require footings. I don't know if it will need steel posts or just big brick pillars (it's an extension, not holding up the back of the house). An engineer will get to decide at some point.
@jellybaby started
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8m steel beam will be fun to install and may require steel posts (with footings) at each end.
lots