in this article we know about what is the standard size of Indian brick? various countries have various standard brick size and dimensions, however, brick can be made in multiple shapes and sizes, depending on its application.
If bricks are large, it is difficult to burn them properly and they become too heavy to be placed with a single hand. On the other hand, if bricks are small, more quantity of mortar is required. Hence, a standard dimension is determined for various brick works.
Actual size (or the specified size), is the real dimension of the brick. Nominal size is the actual size plus the width of the mortar joint. Most bricks are manufactured in such a way that the nominal sizes fit into a grid of 4 inch, which comply with the modules of other building materials such as doors, windows, and wood components.
Standard & Nominal Brick size in India
There are two size of brick used in india standard brick and nominal brick size. The standard brick size is 190 mm x 90 mm x 90 mm as per the recommendation of BIS. With mortar thickness, the dimension of the brick becomes 200 mm x 100 mm x 100 mm which is also known as the nominal size of the modular brick.
Modular brick means brick along with cement mortar joints, standard modular brick size is 200mm ×100mm ×100mm, volume of one standard modular brick is 0.2m×0.1m×0.1m =0.002m3, so volume of one standard modular brick is 0.002m3.
Conventional/ traditional size of brick:- conventional size of brick specification (Length × breadth × height), the length varies from 20 to 25 cm, width varies from 10 to 13 cm and thickness varies from 5 cm to 7.5 cm. The commonly adopted nominal size of traditional/conventional brick is 23 cm x 11.4 cm x 7.6 cm (9”x4 ½ “x3”) approximately.
Conventional/ traditional size of brick in inches:- conventional size of brick specification (Length × breadth × height), the length varies from 8″ to 10″ , width varies from 4″ to 5″ and thickness varies from 2″ to 3″. The commonly adopted nominal size conventional/ traditional brick is 9”x4 ½ “x3” approximately.
Conventional/ traditional size of brick in mm:- conventional size of brick specification (Length × breadth × height), the length varies from 200 to 250 mm, width varies from 100 to 130 mm and thickness varies from 50 mm to 75 mm. The commonly adopted nominal size of traditional/conventional brick is 230 mm x 114 mm x 76 mm (9”x4 ½ “x3”) approximately.
Standard size of brick used in India are two types:- 1) modular brick and 2) non modular brick. The standard modular size of common building brick specification (length × breadth × height) used in india shall be 190mm × 90mm × 90mm and 190mm × 90mm × 40mm and non – modular size of bricks like 230mm × 110mm × 70mm & 230mm × 110mm × 30mm may also be used.
Indian standard brick size:- Standard size of brick used in India are two types:- 1) modular brick and 2) non modular brick. Indian standard modular size of common building brick specification (length × breadth × height) used shall be 190mm × 90mm × 90mm and 190mm × 90mm × 40mm and non – modular size of bricks like 230mm × 110mm × 70mm & 230mm × 110mm × 30mm may also be used.
Brick Shall be hand moulded or machine moolded and shall be made from suitable soil this will be free from cracks, flaws dust and nodules of free lime.
Standard size of brick are hand moulded or machine moulded should have length 190mm, breadth 90mm and depth 90 mm or 70mm provided with a frog dimension 10 to 20mm deep on one of its flat side. Bricks of 40mm height as well as those made by extrusion process may not be provided with frog.
Standard size of brick in cm are following:- 1) modular brick size (l × b × h) – 19cm × 9cm × 9cm and 19cm × 9cm × 4cm and 2) non – modular size of bricks like 23cm × 11cm × 7cm & 23cm × 11cm × 3cm may also be used. 9cm & 7cm height of brick is provided with a frog dimension 1 to 2cm deep on one of its flat side,bricks of 4cm & 3cm height as well as those made by extrusion process may not be provided with frog.
Standard size of brick in mm are following:- 1) modular brick size (l × b × h) – 190mm × 90mm × 90mm and 190mm × 90mm × 40mm and 2) non – modular size of bricks like 230mm × 110mm × 70mm & 230mm × 110mm × 30mm may also be used. 90mm & 70mm height of brick is provided with a frog dimension 10 to 20mm deep on one of its flat side,bricks of 40mm & 30mm height as well as those made by extrusion process may not be provided with frog.
Standard size of brick in inches are following:- 1) modular brick size (l × b × h) – 7.5″ × 3.5″ × 3.5″ and 7.5″ × 3.5″ × 1.5″ and 2) non – modular size of bricks like 9″ × 4.3″ × 2.75″ & 9″ × 4.3″ × 1.18″ may also be used. 3.5″ & 2.75″ height of brick is provided with a frog dimension 0.4″ to 0.8″ deep on one of its flat side,bricks of 1.5″ & 1.18″ height as well as those made by extrusion process may not be provided with frog.
Standard size of modular brick are following :- 1) 190mm × 90mm × 90mm (l×b ×h) – 90mm height brick provided with 10mm to 20mm deep frog on one of its flat side.
2) 190mm × 90mm × 40mm (l × b × h)- 40mm brick height may not be provided with frog.
Nominal size of brick– when we add thickness of brick joint or cement mortar thickness in actual size of brick that is nominal size of brick, such that nominal size of brick = Actual size of brick + thickness of cement mortar, actual size of modular brick is 190mm × 90mm × 90mm,when we add 10mm thickness in which dimension we get nominal size of brick in mm as 200mm × 100mm × 100mm, in cm as 20cm × 10cm × 10cm and in inches as 9″ × 4″ × 4″.
The common burnt clay bricks shall be classified on the basis of average compressive strength into different class designation like 35, 30, 25, 20, 17.5, 15, 12.5, 10, 7.5, 5 & 3.5 having compressive strength are 35 N/mm2, 30 N/mm2, 25 N/mm2, 20 N/mm2, 17.5 N/mm2, 15 N/mm2, 12.5 N/mm2, 10 N/mm2, 7.5 N/mm2, 5 N/mm2 and 3.5 N/mm2 respectively.
Standard brick size and weight: According to Indian practice the weight of standard size of brick is kept between 3- 3.5 kg, depending upon the class of brick, so that a mason can lift it by one hand and work full day. The width should be 4 to 5″ so that a mason can hold it using his fingers and thumb.
What is called frog in brick size?
An indent on one surface of longer side of brick is called Frog, the depth of Frog shall be 10–20 mm, and the size of shall be 10 X 40 X 10 cm. The purpose of providing frog is to hold the mortar. The side of frog is considered as Top surface. It is not provided in the 40 cm high bricks and extruded bricks.
But practically to match with the beam width a brick or block of width 230 mm is used widely in construction industry. The 115 mm is considered for half brick. The size 230 mm X 110 mm X 110 mm or 230 mm X 110 mm X 75 mm is generally used in construction industry.
Popular size of brick used in india
Modular/ Metric Brick: nominal size 20 x 10 x 10 cm. This size is common in MP and only some other places where machine made bricks are available.
English size: 23 x 11.5 x 7.5 cm or 9″ x 4.5″ x 3″ nominal size. This is the most popular size available in most parts of India.
Bengal size: 25 x 12.5 x 7.5 cm size or 10″ x 5″ x 3″. This size is popular in in West Bengal and some parts adjoining West Bengal and North East. A few other sizes are also used in some localized areas.
Basically the size of a brick is governed by its weight, which should not be more than 3 Kg, so that a mason can lift it by one hand and work full day. The width should be 4 to 5″ so that a mason can hold it using his fingers and thumb.
The ratios of length: breadth: thickness are so chosen that the bricks when laid in masonry make a pattern (or Bond) so that vertical joints do not come one above the other in alternate courses.
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Larger sizes that require a mason to use his both hands to lift and place in masonry should be about 17-18 Kg and are termed as Blocks.
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