Frog - Revision history

Designing Buildings at 09:01, 14 January 2021

2021-01-14T09:01:02Z

← Older revision		Revision as of 09:01, 14 January 2021
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	= Introduction =		= Introduction =

−	~~In the production of bricks, the~~ frog is an indentation in ~~the~~ brick~~. It~~ can be on one or two surfaces.	+	A frog is an indentation in a brick that can be on one or two surfaces.
−		+
−	~~= Origins of the term 'frog' =~~	+

	It is thought that the word frog is a translation of the Dutch word 'kikker' and refers to a kicker placed in the bottom of the wooden boxes traditionally used to make clay bricks, which forced the clay material outwards when the brick was being formed.		It is thought that the word frog is a translation of the Dutch word 'kikker' and refers to a kicker placed in the bottom of the wooden boxes traditionally used to make clay bricks, which forced the clay material outwards when the brick was being formed.
−
−	~~= Purpose of the frog =~~
−
−	The frog must be filled with mortar when bricks are laid, otherwise the structural and acoustic performance of the wall will be affected. For this reason it is best practice to lay bricks with the frog facing upwards so that it is easy to fill. Where there are two frogs, the larger frog should face upwards.

	The frog reduces the amount of material used to form the brick, makes it easier to remove from the form, and gives the completed wall better shear resistance. It may also help heat reach the centre of clay bricks in the kiln.		The frog reduces the amount of material used to form the brick, makes it easier to remove from the form, and gives the completed wall better shear resistance. It may also help heat reach the centre of clay bricks in the kiln.

−	Where there are two frogs, the larger frog should face upwards.	+	The frog must be filled with mortar when bricks are laid, otherwise the structural, thermal and acoustic performance of the wall will be affected. For this reason it is best practice to lay bricks with the frog facing upwards so that it is easy to fill. Where there are two frogs, the larger frog should face upwards.

−	Where an acoustic internal partition is required, frogged bricks may also be specified. ~~These~~ should be laid with the frog uppermost, so it can be filled with mortar.	+	Where an acoustic internal partition is required, frogged bricks may also be specified. Again, these should be laid with the frog uppermost, so it can be properly filled with mortar.

	= Other 'frog' meanings =		= Other 'frog' meanings =
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	== Kerbs ==		== Kerbs ==

−	The term ‘frog’ is also used to describe ~~the~~ recess of a kerb, which reduces the weight of each unit. Haunch concrete fills the frog, so there is no loss of performance when laid.	+	The term ‘frog’ is also used to describe a recess in a kerb, which reduces the weight of each unit. Haunch concrete fills the frog, so there is no loss of performance when laid.

	== Switches ==		== Switches ==

Editor at 18:34, 13 January 2021

2021-01-13T18:34:33Z

← Older revision		Revision as of 18:34, 13 January 2021
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	Where there are two frogs, the larger frog should face upwards.		Where there are two frogs, the larger frog should face upwards.
		+
		+	Where an acoustic internal partition is required, frogged bricks may also be specified. These should be laid with the frog uppermost, so it can be filled with mortar.

	= Other 'frog' meanings =		= Other 'frog' meanings =
−
−	~~== Acoustic partitions ==~~
−
−	~~Where an acoustic internal partition is required, frogged bricks may also be specified. These should be laid with the frog uppermost so it can be filled with mortar.~~

	== Kerbs ==		== Kerbs ==

Editor at 18:33, 13 January 2021

2021-01-13T18:33:03Z

← Older revision		Revision as of 18:33, 13 January 2021
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	* Brick.		* Brick.
		+	* How to lay bricks.
	* Kerbs.		* Kerbs.
	* Specifying brick.		* Specifying brick.

Editor at 18:28, 13 January 2021

2021-01-13T18:28:48Z

← Older revision		Revision as of 18:28, 13 January 2021
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−	[[File:LBC.jpg]]	+	[[File:LBC.jpg\|link=File:LBC.jpg]]

	= Introduction =		= Introduction =
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	In the production of bricks, the frog is an indentation in the brick. It can be on one or two surfaces.		In the production of bricks, the frog is an indentation in the brick. It can be on one or two surfaces.

−	= Origins of the term =	+	= Origins of the term 'frog' =

	It is thought that the word frog is a translation of the Dutch word 'kikker' and refers to a kicker placed in the bottom of the wooden boxes traditionally used to make clay bricks, which forced the clay material outwards when the brick was being formed.		It is thought that the word frog is a translation of the Dutch word 'kikker' and refers to a kicker placed in the bottom of the wooden boxes traditionally used to make clay bricks, which forced the clay material outwards when the brick was being formed.

−	= Purpose =	+	= Purpose of the frog =

	The frog must be filled with mortar when bricks are laid, otherwise the structural and acoustic performance of the wall will be affected. For this reason it is best practice to lay bricks with the frog facing upwards so that it is easy to fill. Where there are two frogs, the larger frog should face upwards.		The frog must be filled with mortar when bricks are laid, otherwise the structural and acoustic performance of the wall will be affected. For this reason it is best practice to lay bricks with the frog facing upwards so that it is easy to fill. Where there are two frogs, the larger frog should face upwards.
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	Where there are two frogs, the larger frog should face upwards.		Where there are two frogs, the larger frog should face upwards.

−	= Other meanings =	+	= Other 'frog' meanings =

	== Acoustic partitions ==		== Acoustic partitions ==

Editor: Created page with "File:LBC.jpg = Introduction = In the production of bricks, the frog is an indentation in the brick. It can be on one or two surfaces. = Origins of the term = It is though..."

2021-01-13T18:25:45Z

Created page with "File:LBC.jpg = Introduction = In the production of bricks, the frog is an indentation in the brick. It can be on one or two surfaces. = Origins of the term = It is though..."

New page

[[File:LBC.jpg]]

= Introduction =

In the production of bricks, the frog is an indentation in the brick. It can be on one or two surfaces.

= Origins of the term =

It is thought that the word frog is a translation of the Dutch word 'kikker' and refers to a kicker placed in the bottom of the wooden boxes traditionally used to make clay bricks, which forced the clay material outwards when the brick was being formed.

= Purpose =

The frog must be filled with mortar when bricks are laid, otherwise the structural and acoustic performance of the wall will be affected. For this reason it is best practice to lay bricks with the frog facing upwards so that it is easy to fill. Where there are two frogs, the larger frog should face upwards.

The frog reduces the amount of material used to form the brick, makes it easier to remove from the form, and gives the completed wall better shear resistance. It may also help heat reach the centre of clay bricks in the kiln.

Where there are two frogs, the larger frog should face upwards.

= Other meanings =

== Acoustic partitions ==

Where an acoustic internal partition is required, frogged bricks may also be specified. These should be laid with the frog uppermost so it can be filled with mortar.

== Kerbs ==

The term ‘frog’ is also used to describe the recess of a kerb, which reduces the weight of each unit. Haunch concrete fills the frog, so there is no loss of performance when laid.

== Switches ==

In railway switches and crossings a frog is the term assigned to the V-shape which allows the flange of a wheel to pass where two rails cross.

= Related articles on Designing Buildings Wiki =

* Brick.
* Kerbs.
* Specifying brick.
* Railway engineering.
* Which way up should you lay a brick?

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