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Thread: Hanging beam and ceiling joists
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7th November 2007, 06:55 AM #16Novice
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John
Just to make sure I understand - the hanging beam is the one that is cut (knotched) and then would you attach joist hangers either side of the counter beam to support the hanging beam?
thanks
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7th November 2007, 12:07 PM #17SENIOR MEMBER
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That's the way.
Instead of joist hangars, you could use Universal Framing Anchors (also called 'multigrips') on all sides, with the flanges bent up over the bottom of the hangars to give extra support. They'd do the same job.
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8th November 2007, 10:53 PM #18
Question1: Yes you can move the beam, My tables show the following
110x30 F17 grade will span 2800 @ 450 centres.
110x30 F14 grade will span 2700 @ 450 centres.
Question 2: Most likely your house is built with F14 grade hardwood if it was built with seasoned timber or it may have been built with unseasoned grade F8 and has dried out with normal ageing.
Question 3: My tables show for hanging beams with ceiling joist span of 1800 ( they don't go lower)
you need 245x45 F14 grade to span 5900 and for F17 245x35 will span 5700.Life is like a novel with the last page missing.:doh:
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8th November 2007, 10:54 PM #19
Oh and don't forget to prop the ceiling underneath when you go to move the beam
Life is like a novel with the last page missing.:doh:
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9th November 2007, 10:15 AM #20New Member
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Another thought - cathedral ceiling?
Haven't found the time to do the job yet, but I've had another thought - why not take out the ceiling completely and create a cathedral ceiling with a couple of skylights? If I was to remove the ceiling joists and hanging beam from the kitchen (this is possible without affecting adjoining rooms), is there anything I need to do to the roof timbers and/or eaves? There are a couple of strutting beams extending from the interior kitchen wall to the roof and these would obviously have to remain. Also all electricals would need to be moved but that's no big deal.
Any help would be appreciated.
Cashy
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9th November 2007, 01:24 PM #21SENIOR MEMBER
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With the proper engineering it could be done.
I'm considering putting a pyramid shaped ceiling leading to a skylight in my kitchen.
The ceiling joists usually provide a tie between opposite outside walls, and lock opposing rafters together to prevent them spreading, but if the ridge is propped, and perhaps a suitable perimeter beam is securely fastened together, then it can be done.
I'd certainly refer you to an engineer first though.
Edit: I might start a thread with photos, outlining my proposal and how I would intend to tackle it. It would then be less hassle for an engineer to certify my design.
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