• 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.

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