I am getting my local brickie to build a garden wall using common 'heather'
bricks. This will be a single skin width (i.e. 4ins) so will be stretcher
bond, and will be 2.1 metre high. At approx 4 metre intervals there will be
450mm square piers which will be visible from outside (and inside).
Obviously I will need some intermediate smaller piers (visible from inside
only) to give some extra support. We have some similar ones on an existing
wall which are 2 metres apart and project inside by the length of 1 brick
(i.e. 215mm). Will this be sufficient, or will I need piers which are closer
together and/or have a larger cross section? I am aware that there are
guidelines issued to architects which give information on heights and spans
for different parts of the country (depending on the prevailing wind
strength) but I can't seem to find them. I live in the Reading area, so not
too windy here! I could avoid the problem if I specified a double skin wall
(i.e. 215mm wide) but this would be a lot more expensive.