Hi
I live in a very standard 1930s semi-detached property.
I'm in the midst of trying to get a loft conversion done with a dormer.
I have had some building control plans produced by a firm. They've used a structural engineer for the calculations, steels, etc.
I have a question which I will approach them with after the bank holiday but just wanted to crowd source also.
The engineer has specified 5 steels:
My questions are:
I live in a very standard 1930s semi-detached property.
I'm in the midst of trying to get a loft conversion done with a dormer.
I have had some building control plans produced by a firm. They've used a structural engineer for the calculations, steels, etc.
I have a question which I will approach them with after the bank holiday but just wanted to crowd source also.
The engineer has specified 5 steels:
- Ridge steel 152x152 UC 30kg/m.
- Two floor steels running from side to side at the positioned towards the front and back of the property: 152x152 UC 37 kg/m S355.
- A floor steel inline with the ridge: 152x152 UC 30kg/m.
- A floor steel, acting as a header, that connects the 2 front and rear steel, transferring the load from the floor steel that runs inline with the ridge since the staircase means that this steel can't continue to the wall: 152x152 UC 30kg/m.
My questions are:
- If the steels are 152 and the timbers are 200 then the timbers will need notching to fit into the web of the steels. Am I saving anything by not having taller steels that the timbers will fit into without notching?
- There's roughly 5200mm between the front and back steels. I'm assuming that the reason for the floor steel inline with the ridge is because this distance is too long for the floor joists to run without support? If it was possible to span this distance then I could save on the cost of 2 steels.
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