DIMENSION, SIZE, TOLERANCE AND AREA OF BRICK BASED ON DIFFERENT STANDARD CODES



      Hi friends, you are welcomed in the world of Civil Allied Gyan. In this article I have explained about dimensions, size, tolerances and area of brick based on different standard codes.

By the help of this blog you can find the dimensions, size, tolerances and area of brick according to different standard codes easily. So please continue to the end & keep your love and support on me.


Topics included in this Post :-
What is a brick,
Dimensions of Brick According to Different Standard Codes,
Cause of changes in standard brick size,
Bricks Size as per ASTM International,
Bricks Size as per Canadian Standard Associations (CSA),
Bricks Size as per Indian Standard (IS 1077),
Bricks Size as per British Standard,
Bricks Size as per Australian Standard,
Area of Brick According to Different Standard Codes.


Brick is a commonly used building material which is manufactured from burnt clay. It is mostly consisted of clay, sand, lime and bearing soil or other concrete materials.


Brick dimensions is one of the most crucial parameters that need to be considered during the selection of bricks in order to ensure they fit with the design layout. Brick selection is decided based on the certain application in which the brick is used. Due to the fact that bricks are used in various constructions, different brick sizes are needed. All the same only bricks of one standard size shall be used in one work unless specially permitted by the Client / Consultant.


https://civilalliedgyan.blogspot.com/2020/04/dimensions-tolerances-and-area-of-brick-according-to-different-standard.html
Brick Image

There are many standards each of which established by a country that provide standard sizes for bricks for example ASTM (American Standard for Testing Materials), BS (British Standard), CSA (Canadian Standards Association), and IS (Indian Standard). Good quality bricks shall have uniform size. The size of the conventional bricks shall be 225 × 110 × 75 mm³.

Cause of changes in standard brick size:- Commonly, manufacturing process and variations in raw materials due to shrinkage of the clay during drying and firing, wear of the mold or extrusion die, or undue stress on the units during handling prior to firing are the root cause of changes in standard brick size.


The size of the conventional bricks dimension used in the United States is 203 × 92 × 57 mm³. The more commonly used is the modular brick, which dimension is 194 × 92 × 57 mm³ (length x depth x height).

However, the ASTM International Standards such as ASTM C62 (Standard Specification for Building Brick ‘Solid Masonry Units Made From Clay or Shale’), ASTM C216 (Standard Specification for Facing Brick ‘Solid Masonry Units Made from Clay or Shale’), ASTM C652 (Standard Specification for Hollow Brick ‘Hollow Masonry Units Made From Clay or Shale’), and  ASTM C1088 (Standard Specification for Thin Veneer Brick Units Made From Clay or Shale) have all emphasized that the size of bricks shall be specified by the purchaser.

Tolerable variations in the specified brick sizes are set by ASTM International Standards. The following tolerances are permitted in the standard conventional size adopted on the particular work.
  • Length +3.0 mm/3.0 mm
  • Breadth +1.5 mm/–1.5 mm
  • Depth +1.5 mm/–1.5 mm

The maximum permissible variation in dimensions of individual units shall not exceed those given in Table-1 and Table-2 provides different size variations for hollow bricks.

Table1. Variations of dimensions of solid bricks


Specified dimension, mm
Maximum Permissible Variations from Specified Dimension, + or -, mm
Up to 76, inclusive
2.4
Over 76 to 102, inclusive
3.2
Over 102 to 152, inclusive
4.8
Over 152 to 203, inclusive
6.4
Over 203 to 305, inclusive
7.9
Over 305 to 406, inclusive
9.5


Table2. Hollow Brick Minimum Thickness of Face Shells and Webs
Nominal Width of Units, mm
Face Shell Thicknesses, mm
Face Shell Thicknesses, mm
End Shells or End Webs
_
solid
Cored or Double Shell

76 and 101
19.05
-
19.05
152
25.4
38
25.4
203
32
38
25.4
254
35
41
29.5
306
38
50
29.5


Permitted size variation is based on the brick classification and the relative dimensional range measured. Size variation becomes important when vertical alignment of brick (stack bond) is used, when bands of brick from different production runs are combined, or when a short horizontal extent of brickwork is constructed, such as between closely spaced window openings.

Similar to ASTM international, Canadian Standard Association CSA A82, does not stipulate specific brick sizes. However, it has established permissible variations in brick size which should not be violated. The maximum permissible variations from specified dimension is similar as Table-1.

Brick sizes based on IS 1077 specification (Common burnt clay building bricks)
The standard modular size of common building bricks shall be as follows:

A.) The standard modular size of common building bricks shall be as follows: 
Length (L)
Depth/Width (D/W)
Height
(H)
mm
mm
mm
190
90
90
190
90
40


B.) The non-modular size of bricks shall be as follows:
Length (L)
Depth/Width (D/W)
Height
(H)
mm
mm
mm
230
110
70
230
110
30


C.) Additionally, for obtaining proper bond arrangement and modular dimensions for the brick work, with the non-modular sizes, the sizes of bricks may be as follows:
Length (L)
Depth/Width (D/W)
Height
(H)
mm
mm
mm
70
110
701/3


Table-3. Tolerable Variations of Dimensions of Brick
Specified Dimension
Maximum Permissible Variation
Over 50 mm and up to 75 mm
±1.5 mm
Over 75 mm and up to 100 mm
±3.0 mm
Over 100 mm and up to 150 mm
±5.0 mm
Over 150 mm and up to 250 mm
±6.0 mm



Tolerances in Brick Dimensions :-

For modular size
Dimensions
Size (IS)
Maximum
Minimum
Length
190
190+4
190-4
Width/Depth
90
90+3
90-3
Height
90
90+3
90-3


For non-modular size
Dimensions
Size (IS)
Maximum
Minimum
Length
230
230+4
230-4
Width/Depth
110
110+3
110-3
Height
70
70+3
70-3



The standard dimension of a modern brick as per British Standard BS shall be as follows:
Length (L)
Depth/Width (D/W)
Height
(H)
mm
mm
mm
215
102.5
65


The standard brick size based on Australian Standard AS 4455 shall be as follows::
Length (L)
Depth/Width (D/W)
Height
(H)
mm
mm
mm
230
110
76
290
90
50


To calculate area of a brick or bricks you will have to find the Dimension of the Brick (Check here: Dimension of Bricks).
  1. First of all, take twenty no. (20) of test specimen.
  2. Lay the twenty No. of brick contact with each other in longitudinal direction to   measure the length of the test piece.
  3. Lay the twenty No. of brick in width wise direction and measure the width.
  4. Lay the twenty No. of brick in height wise direction and measure the thickness.
  5. Calculate the individual and average of the measures.
Now you have the length (L), width/depth (W/D) and height (H) of each brick.



Every brick is a cuboid so its area is derived from the following formula.

Area of a brick = 2(LW+WH+HL), where L is the Length, W is the Width/Depth and H is the Height.

This formula is sufficient for all different type Standards.

For example,
Area of modular size Brick as per IS (190 × 90 × 90) in mm³
=2(190 × 90 + 90 × 90 + 90 × 190) mm³
=2(17100 + 8100 +17100) mm³
=2 × 42300 mm³
=84600 mm³

Note – If the Brick has each 12 sides (6+6) of different length. Then it is difficult to find the area of the brick but not impossible.
  1. Take 10 bricks and measure different length of sides.
  2. Combine theme as well as described above (1. To 5.) with respect to the side of equal length, then measure it’s all 12 (6+6) sides individually and find average of measures.
  3. Now calculate the mean of length of all 12 sides individually.
  4. A brick has 6 faces. After calculating the area of each faces, you find the total area of the brick which is equal to the sum of area of all 6 faces.



https://civilalliedgyan.blogspot.com/2020/04/dimensions-tolerances-and-area-of-brick-according-to-different-standard.html



Thanks for reading. Share this and keep your love and support on me (Civil Allied Gyan).


Note – It is notified that Civil Allied Gyan does not own the whole information contained in this article. Some of these information (like different Standard dimension of brick) of the article are collected on internet. If you have any claim of copyright issue on any content on this article, then you can contact me freely.