Midgirl,
While I accept you have an architect, the reason I first thought you didn't is that the information you were seeking is what typical working drawing details show.
I have little time for architects who do not fully inform the contractor of the detail to be used and he/she should also inform the client if requested.
Working drawings should show that a particular set of details work, and fully inform those persons who are constructing the building.
Its no enough to say "its in the building regulations" when dealing with Quinn-Lite or AAC blocks, because they are not standard.
They are Autoclaved Aerated Concrete, which you can read about here -
http://en.wikipedia.org/wiki/Autoclaved_aerated_concrete
I would be concerned if your builder has been instructed to use standard details on Quinn-Lite/AAC blocks; -
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"Depending on its density, up to 80% of the volume of an AAC block is air.
AAC's low density also accounts for its low structural compression strength.
It can carry loads up to 1,200 PSI, approximately only about 10% of the compressive strength of regular concrete.[4]"
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As I've noted previously in other posts, AAC structure need careful detailing
by an engineer to ensure stability.
This is in part because they are not as robust as standard blocks and not as strong either.
For example, even heavy doors fixed to lightweight blocks need special fixing details.
I would be concerned if you were using slim columns or short walls in the design.
You should immediately get a structural engineer to check your design.
You should also ensure the proposed details offer adequate fire prevention and damp proofing performance.
Ask your architect to give a written confirmation of the Fire Resistance of these blocks used in this way.
Check it with Quinn-Lite themselves and your local building control officer - you cannot be too careful.
ONQ.
[broken link removed]
All advice on AAM is remote from the situation and cannot be relied upon as a defence or support - in and of itself - should legal action be taken.
Competent legal and building professionals should be asked to advise in Real Life with rights to inspect and issue reports on the matters at hand.