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The figures shown below
are intended for “rule of thumb” use only.
Unit Quantities
-
2 1/2 High Block (21/4x8x16)–3.10
block per SF of wall area
-
Half High Block (4x8x16)–2.25 block
per SF of wall area
-
Standard Block (4”, 8”, 10”,
12”)–1.125 block per SF of wall area
-
Face Brick Modular–7.0 brick per SF of
wall area
-
Oversize Brick–6.0 brick per SF of
wall area
-
Utility Brick–3.0 brick per SF of wall
area
Mortar
Quantities
-
Block–3 bags per 100 block
-
Face Brick Modular–7 bags per 1000
brick
Oversized Brick–8 bags per 1000 brick
-
Utility brick–10 bags per 1000 brick
Sand Quantities
Horizontal Wall
Reinforcing Quantities
Cavity Fill
Insulation Quantities
Approximate
Volume Required To Fill Core Voids In Block
-
6x8x16 2 core 0.17 CF/block
-
8x8x16 2 core 0.25 CF/block
-
10x8x16 2 core 0.33 CF/block
-
12x8x16 2 core 0.39 CF/block
Approximate
Quantities Of Concrete Required To Fill Bond Beams
-
6x8x16 BBL 0.173 CF concrete per LF
-
8x8x16 BBL 0.22 CF concrete per LF
-
8x8x16 DEEP BBL 0.46 CF concrete per
LF
-
12x8x16 BBL 0.37 CF concrete per LF
-
12x8x16 DEEP BBL 0.74 CF concrete per
LF
|
Number Of Blocks
Per Cube
|
|
Size |
Arch PSF
No Per Cube |
Arch PSMF
No Per Cube |
Arch GF
No Per Cube |
|
21/4x4x16 |
270 |
--- |
--- |
|
4x4x16 |
240 |
240 |
288 |
|
4x8x16 |
120 |
120 |
144 |
|
6x4x16 |
100 |
100 |
120 |
|
8x8x16 |
75 |
75 |
90 |
|
12x8x16 |
50 |
50 |
60 |
|
Typical Concrete
Masonry Unit Dimensions
|
|
Nominal
|
Actual
Unit Size
|
Faceshell
Thickness( a)
|
Web
Thickness (a)
|
|
Inch-
Pound
|
Metric
|
Inch-
Pound
|
Metric
|
Inch-
Pound
|
Metric
|
Inch-
Pound
|
Metric
|
|
(in.)
|
(mm)
|
(in.)
|
(mm)
|
(in.)
|
(mm)
|
(in.)
|
(mm)
|
|
4x8x16 |
102x203x406 |
35/8x75/8x155/8 |
92x194x397 |
3/4 |
19 |
3/4 |
19 |
|
6x8x16 |
152x203x406 |
55/8x75/8x155/8 |
143x194x397 |
1 |
25 |
1 |
25 |
|
8x8x16 |
203x203x406 |
75/8x75/8x155/8 |
194x194x397 |
11/4 |
32 |
1 |
25 |
|
10x8x16 |
254x203x406 |
95/8x75/8x155/8 |
244x194x397 |
13/8 |
35 |
11/8 |
29 |
|
12x8x16 |
305x203x406 |
115/8x75/8x155/8 |
295x194x397 |
11/2 |
38 |
11/8 |
29 |
|
(a) Dimensions are minimum
required by ASTM C 90 (a) (ref,3). |
Designing
Walls To Avoid Cutting Units On Jobs

Rule 1.
A dimension in even number of feet (2 ft., 4 ft., 6 ft., etc.) will
always work out in full-and half-block.

Rule 2.
A dimension in an even number of feet plus 8 in. (2 ft. 8 in., 4 ft.
8 in., 6 ft. 8 in., etc.) will always work out in full-and
half-block.

Rule 3.
A dimension in an odd number of feet (1 ft., 3 ft., 5 ft., etc.).
will not end in full-and half-block. But an odd number of feet plus
4 in. (1 ft. 4 in., 3 ft. 4 in., 5 ft. 4 in., etc.) will always work
out in full-and half-block.
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Examples of wrong and right
planning of concrete masonry wall openings |
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