Civil Engineering Reference
In-Depth Information
MX2.2
MX2.2
MX2.2
parapet, no coping
not severe rain or
frost
MX2.1
MX2.1
MX2.1
Sheltered by coping
by
re rain or
by
coping
MX1
MX1
internal walls - not
damp
MX1
MX1
innerleaf not
inner
subject to damp
subject to dam
p
inner
leaf not
MX2 values
MX2 v
become MX3 when
subjected to
freeze/tha
MX2 v
alues
freez
e/tha
w
MX2.1
MX2.1
internal walls with
possible damp -
laundri
laund
ri
laund es etc
ri
es etc
MX2.2
freestanding w
no coping - not
servere rain or frost
freestanding wall
freestanding w
all
re rain or frost
MX2.1
MX2.1
MX2.1
MX2.1
non-aggressive soil
non-aggressiv
e soil
l
e soil
l
belo
ne
Figure 20.6
Exposure classifi cations and masonry properties
In load-bearing masonry construction stability is provided
by either a cellular plan, cross wall construction, spine wall
construction or by using geometric sections (e.g. diaphragm or
fi n walls) (IStructE, 2008) (see
Figure 20.7
).
Cellular plan construction is often found in low to medium
rise construction where the internal and external walls form
stiff cellular boxes which can be used to resist lateral loads.
The internal and external walls in this form of construction
