Large cavities in block walls.

gears · 13-10-2009 10:05am #1

When building in block construction I am aware that when using cavities larger than 100mm, extra engineer works or supports of some kind may be required. But if going from 100mm to 150mm is there a need for much extra works or can you simply have a wider foundation and simply build as normal.

Quazzie · 13-10-2009 10:51am

gears wrote: »

When building in block construction I am aware that when using cavities larger than 100mm, extra engineer works or supports of some kind may be required. But if going from 100mm to 150mm is there a need for much extra works or can you simply have a wider foundation and simply build as normal.

The correct answer is that anything over a 100mm cavity needs to be designed by an engineer, and I doubt you will get many here offering advice otherwise.

Originally Posted by C&P Charter
On construction related matters any specifying of structural components is prohibited. Any queries in this regard need to be dealt with by an architect/engineer privately.

The engineer will specify the different components that need to be modified to make the wall structurally sound. Things like, vertical and horizontal wall ties spacing, max linear lenghts, max heights are all factors that contribute and may require modification depending on the cavity size, and the orientation of the wall. It would be extremely foolish to do anything other than what is advised in the Charter. Professional advice is most definitely needed.

gears · 13-10-2009 10:56am

That's what I was thinking but I wasn' tsure if it applied to 150mm cavities or just to those about that level. Thanks.

Large cavities in block walls.

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