P HY S I C A L P R O P E R T IES
STANDARD 25 CM UNITS
ACTUAL DIMENSIONS (mm)
Width 240
Length 390
Height 190
HOLLOW
SEMI SOLID
FULL SOLID
H/20/A/O
H/15/D/O
SS/20/A/O
SS/15/D/O
SF/20/A/O
SF/15/D/O
35
28
127
75
30
187
N/A
N/A
240
93.6x103
49.6x103
93.6x103
73.0x103
93.6x103
93.6x103
17.784x106
9.426x106
8.358x106
17.784x106
13.870x106
3.912x106
17.784x106
17.784x106
N/A
P R O P E R TIE S
CDS Designated Code
Normal Weight
Lightweight
Dimensions (mm)
Minimum Face Shell Thickness
Minimum Web Thickness
Equivalent Thickness
Area (mm2)
Gross Area
Net Area
Volume (mm3)
Gross Volume
Net Volume
Void Volume
Percent Solid (%)
Net Volume/Gross Volume
53%
78%
100%
Typical Unit Mass (kg)
Normal Weight
Lightweight
CSA “A” Concrete
CSA “D” Concrete
19.8
15.5
29.1
22.9
37.3
29.3
Wall Mass, Ungrouted
(kg/m2)
Normal Weight
Lightweight
CSA “A” Concrete
CSA “D” Concrete
248
194
364
286
466
366
Specific Compressive
Strength Minimum
(MPa)
Normal Weight
Based on Net Area
Based on Gross Area
20.0
10.6
20.0
15.6
20.0
20.0
Lightweight
Based on Net Area
Based on Gross Area
15.0
8.0
15.0
11.7
15.0
15.0
Fire Performance
Rating (hours)
Normal Weight - N.B.C.
Lightweight - L220S
2.4
3.5
4+
4+
4+
4+
Sound Properties
Sound Transmission Class - (STC)
Normal Weight
CSA “A” Concrete
Lightweight
CSA “D” Concrete
50.0
47.0
55.0
52.0
59.0
55.0
RSI Factors
Normal Weight
Lightweight
0.19
0.26
N/A
N/A
N/A
N/A
Thermal Properties
(m2 °C/w)
CSA “A” Concrete
CSA “D” Concrete
*Note: all data and measurements are based off theoretical calculation.
Refer to CSA Standards on concrete masonry units.
**75% Solid and Solid 25 cm units are only available on special order,
please contact your sales representative for more information.
PRODUCT GUIDE
CMU | 2012
P R OD U C T S P EC I F IC A TIO NS
CONCRETE MASONRY UNITS
25 CM STANDARD
Heavyweight: 20.0kg
Lightweight: 15.5kg
PRODUCT GUIDE
The most common unit of block in
masonry, stretcher units are used in most
wall applications. They usually consist of
two cores, are smooth faced and have
either one or two frogged (concaved)
ends.
CMU | 2012
P R OD U C T S P EC I F IC A TIO NS
CONCRETE MASONRY UNITS
25 CM HALF
Heavyweight: 10.0kg
Lightweight: 7.8kg
PRODUCT GUIDE
Half blocks are most commonly used at
the end of a straight wall. The Half block
is also available in single and double
bullnose.
CMU | 2012
P R OD U C T S P EC I F IC A TIO NS
CONCRETE MASONRY UNITS
25 CM SINGLE BULLNOSE
Heavyweight: 20.0kg
Lightweight: 15.5kg
PRODUCT GUIDE
Bullnose blocks usually have either one
rounded corners or two. They are typically
inserted on the end of a wall or in a door
jam to apply a smooth, finished look to a
wall.
CMU | 2012
P R OD U C T S P EC I F IC A TIO NS
CONCRETE MASONRY UNITS
25 CM DOUBLE BULLNOSE
Heavyweight: 20.0kg
Lightweight: 15.5kg
PRODUCT GUIDE
Bullnose blocks usually have either one
rounded corners or two. They are typically
inserted on the end of a wall or in a door
jam to apply a smooth, finished look to a
wall.
CMU | 2012
P R OD U C T S P EC I F IC A TIO NS
CONCRETE MASONRY UNITS
25 CM SINGLE BULLNOSE HALF
Heavyweight: 10.0kg
Lightweight: 7.8kg
PRODUCT GUIDE
Half blocks are most commonly used at
the end of a straight wall. The Half block
is also available in single and double
bullnose.
CMU | 2012
P R OD U C T S P EC I F IC A TIO NS
CONCRETE MASONRY UNITS
25 CM DOUBLE BULLNOSE HALF
Heavyweight: 10.0kg
Lightweight: 7.8kg
PRODUCT GUIDE
Half blocks are most commonly used at
the end of a straight wall. The Half block
is also available in single and double
bullnose.
CMU | 2012
P R OD U C T S P EC I F IC A TIO NS
CONCRETE MASONRY UNITS
25 CM BOND BEAM
Heavyweight: 20.0kg
Lightweight: 15.5kg
PRODUCT GUIDE
The bond beam is a U-shaped block
designed to accommodate horizontal
reinforcing bars. They are filled with
mortar or grout as a part of the reinforcing
system.
CMU | 2012
P R OD U C T S P EC I F IC A TIO NS
CONCRETE MASONRY UNITS
25 CM OPEN CORE
Heavyweight: 23.6kg
Lightweight: 13.0kg
PRODUCT GUIDE
These concrete masonry units have
one large cell. They are designed to be
stacked in rectangular columns.
CMU | 2012