Lack of wall plate on existing flat roof extension

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Abode Solutions
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Lack of wall plate on existing flat roof extension

Post by Abode Solutions »

My turn to ask a question now, so I want to knock a wall out I'm between a kitchen and a dining room (dining room being an extension built per '91 apparently). I've just broke through the boards to see what's going on in regards to the wall plate as this would have an impact on how low the RSJs would be once the wall is gone. The problem is there doesn't seem to be one and got to be honest, I don't know much in regards to roofing. Anyone know if this is to regs?

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Re: Lack of wall plate on existing flat roof extension

Post by ayjay »

The joist you show in your pic is in/on a masonry hanger. Using these means you don't need a wall plate, in that respect it meets regs OK, (not sure if the clout nail in the side is kosher with the regs, in the lighter weight jiffy hangers often used they have to be twist nails).

One thing that is not well known and consequently often not adhered to is that there should be one metre of brick/blockwork above masonry hangers.
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Re: Lack of wall plate on existing flat roof extension

Post by Abode Solutions »

Ah nice one for the info. So last question is could all those bricks that the hangers sit on be replaced with an RSJ?

(That's the first couple of courses of bricks visible above the plaster line)

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Re: Lack of wall plate on existing flat roof extension

Post by Job and Knock »

No reason why not although it will need a structural engineer's calculation to size it and the UB (universal beam - I've had a telling off for using the term RSJ :oops: ) will probably need to sit on padstones at either end. I've installed more than a few where we've bolted an infill into the web of the steel and then just used standard joist hangers and twist nails to carry the joists
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Re: Lack of wall plate on existing flat roof extension

Post by Abode Solutions »

Talking of beams... Has anyone came across or uses this site before...

http://www.beamcalculation.co.uk/

Seems a lot cheaper than than getting someone out as long as you know what you're doing

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