Extension Roof. Steel hip beams and steel ridge beam or Timber ring beam?

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Minatoar

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• 27 Oct 2016

• #1

SE-Crop-1

• Minatoar
• 27 Oct 2016

My architect drew plans for my extension and proposed that the roof be constructed using steel hip beams and steel ridge beam, (see dotted line on drawing) and that I would need a structeral enginneer to specify the steels. I contacted an on line SE firm regarding this and he came back with a proposal to use a timber ring beam and rafters being the hip and ridge non-structural beams (timber boards). He said that this would be cheaper and more rational.
Please can anyone advise the merits of either method?
Many thanks.

 

Last edited: 27 Oct 2016

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Minatoar

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• 27 Oct 2016

• #2

How do I attached a picture to this post?

 

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garyo

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• 27 Oct 2016

• #3

Upload them to your gallery (//www.diynot.com/diy/media/add) then paste the image link in to your post.

 

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garyo

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• 27 Oct 2016

• #4

I presume this is a vaulted ceiling, so this is about controlling roof spread, and will depend to some extent on the pitch of the roof and the roof covering.

Your other option is some 'feature' flying beams like this: http://europecinefestival.org/cotta...m-contemporary-with-sliding-doors-wall-art-1/

 

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• 27 Oct 2016

• #5

Thank you for help in uploading pictures.
The roof pitch is circa 30 degrees with interlocking concrete roof tiles.

 

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John D v2.0

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• 27 Oct 2016

• #6

Sounds like you have a good SE as he has input into the design. If you can avoid steel you should as it's heavy to install and expensive to buy and has to be custom made so can't be altered on site

 

^woody^

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• 27 Oct 2016

• #7

I propose you get a better plan drawer who can draw something that's clear.

Where's the head, where's the tail?

Yeah, the ring beam is much more logical

 

Last edited: 27 Oct 2016

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• 28 Oct 2016

• #8

Thank you for the advice. I'm sorry that I didn't include any more detail than the crop attached.
End elevation now included: Perhaps this will help?

 

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• 28 Oct 2016

• #9

Both views

 

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• 28 Oct 2016

• #10

End elevation

 

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dom_k

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• 28 Oct 2016

• #11

The ring beam may work in timber but would be quite chunky to span 4m whilst minimising deflection. What size is proposed. Hopefully not 50x100...

 

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• 3 Jan 2017

• #12

The ring beam is to be constructed by bolting 4 200x50 timbers run in parallel tied together along the deepest side (square section) they will be bolted together at 500mm centres using M12 bolts. This will effectivly result in a 200x200 mm beam.