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peterbocholt23 Oct 2016 11:52Hello forum, this is a general question.
We are planning an extension and want to open up an existing rafter roof on one side by about 7m (23 feet) and add a new roof frame. For this, beams (purlins) need to be installed in the existing roof. These beams are planned to be about 40cm (16 inches) high. On the side opposite to the opening, this becomes very problematic due to the existing living space. Therefore, the question is whether it is possible to use steel beams instead of wooden ones so that the beams do not need to be 40cm (16 inches) high?
It is clear that a structural engineer must calculate this! However, the current engineer is somewhat difficult and does not want to take this into account. She sees no problem with having to renovate the entire existing apartment and therefore does not address my question.
I would probably have to consult another structural engineer, which will of course cost money again. Before doing so, I wanted to ask the experts here whether this would generally be possible and what such a steel beam might look like—welded plates, brackets, supports...? The beam length would be about 7m (23 feet), with support points only at the ends.
Regards,
Peter
We are planning an extension and want to open up an existing rafter roof on one side by about 7m (23 feet) and add a new roof frame. For this, beams (purlins) need to be installed in the existing roof. These beams are planned to be about 40cm (16 inches) high. On the side opposite to the opening, this becomes very problematic due to the existing living space. Therefore, the question is whether it is possible to use steel beams instead of wooden ones so that the beams do not need to be 40cm (16 inches) high?
It is clear that a structural engineer must calculate this! However, the current engineer is somewhat difficult and does not want to take this into account. She sees no problem with having to renovate the entire existing apartment and therefore does not address my question.
I would probably have to consult another structural engineer, which will of course cost money again. Before doing so, I wanted to ask the experts here whether this would generally be possible and what such a steel beam might look like—welded plates, brackets, supports...? The beam length would be about 7m (23 feet), with support points only at the ends.
Regards,
Peter
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